CN111777389B - A kind of quick-setting adjustable cement-based underwater anti-dispersion ultra-fast hard grouting material, preparation method and application - Google Patents

Abstract

The invention provides a quick-setting adjustable cement-based underwater anti-dispersion ultrafast hard grouting material, a preparation method and application thereof, wherein the quick-setting adjustable cement-based underwater anti-dispersion ultrafast hard grouting material comprises a component A: 80-90% of cementing material, 3-10% of active admixture, 3-7% of expanding agent, 2-3% of high-performance underwater anti-dispersant and 0.1-0.3% of polycarboxylic acid high-performance water reducing agent; and B component: 80-90% of rapid hardening cementing material, 4-10% of active admixture, 3-7% of expanding agent, 2-3% of high-performance underwater anti-dispersant, 0.1-0.3% of polycarboxylic acid high-performance water reducing agent, 0.1-0.2% of retarder, 0.1-0.2% of early strength admixture, 0.1-0.15% of thixotropic agent and 0.05-0.1% of interface wetting agent. The A, B component single liquid has long working time, high coagulation and hardening speed after mixing, high strength, good underwater anti-dispersion property, adjustable coagulation time by adjusting A, B component proportion.

Description

A kind of quick-setting adjustable cement-based underwater anti-dispersion ultra-fast hard grouting material, preparation method and application

technical field

The invention belongs to the technical field of underwater quick repair grouting material, and in particular relates to a quick-setting adjustable cement-based underwater anti-dispersion ultra-fast hard grouting material, a preparation method and an application.

Background technique

With the vigorous development of engineering construction in the fields of expressways, railways, water conservancy and hydropower, and rail transit in China, more and more tunnels and underground projects will encounter rock cracking and water seepage during operation. Taking a railway tunnel as an example, it is necessary to strictly control the smoothness of the line during its operation to ensure the safety of the driving line. However, due to factors such as complex geological structure, unstable rock structure, groundwater and driving vibration, railway tunnels are prone to ballast settlement during operation, which in turn leads to deterioration of the tunnel structure and greatly affects the safety of tunnel operations. Reinforcing and remediation for the void settlement of operating railway tunnels is often due to the existence of groundwater and the short skylight period of high-speed trains that can be occupied during the repair process, which poses a test for rapid repair by underwater grouting.

At present, the grouting repair materials for the void settlement of railway tunnel track beds are mainly divided into two categories: organic polymer grouting materials and cement-water glass double-liquid grouting materials. The organic polymer grouting material has the characteristics of low consolidated density, fast hardening, and large expansion coefficient, but the material cost is high, the consolidated strength is low, and in the grouting process, due to the volume of the polymer grouting material The expansion has a certain hysteresis, and the control of the grouting process is delicate and complicated. In addition, the polymer grouting material is an organic material, and the concrete interface with inorganic materials has problems such as unstable bonding and poor durability. The cement-water glass double-liquid grouting material has the advantages of low cost, stable bonding interface and high later strength, but its setting time is difficult to control, the strength after early hardening is low, and it cannot meet the driving conditions during the emergency repair window period, and the underwater The dispersion resistance is poor, and it is easy to be washed away during the grouting process, which further makes it difficult to fill and compact the cavity area.

The rapid underwater repair project of the emptying and settlement of the railway tunnel ballast needs a grouting material suitable for underwater grouting construction, which can complete the grouting in a short period of skylight and quickly solidify and harden, and the strength meets the requirements of driving. This material needs to have the characteristics of underwater anti-dispersion and ultra-fast hardening and high strength at the same time. The flocculation component provides underwater anti-dispersion resistance and will increase the cohesion of the slurry and the resistance of grouting, and the material properties of ultra-fast hardening and high strength It is easy to cause the slurry to harden and block the pipe and the warehouse during the grouting process, and it is difficult to clean the grouting equipment after an abnormality occurs, which will further reduce the construction available time during the skylight period.

Patent 201110347875.5 published on June 20, 2012 proposes a super-early-strength grouting material for the repair of ballastless track structures for high-speed railways. The early strength is high, but it has no underwater dispersion resistance. During underwater grouting repair, the slurry is easily washed away by the mud in the cavity. In the patent 201310169894.2 published on August 28, 2013, an underwater non-dispersing fast-setting inorganic grouting material and its preparation method are proposed. The compressive strength is 15MPa, which is difficult to meet the traffic demand after the repair of the skylight of the railway tunnel. Patent 201910625066.2 published on August 30, 2019 proposes a super early-strength cement-based underwater non-dispersible repair material and its preparation method. The fastest initial setting time of the material example is 48min, and the final setting time is 92min, no early strength data. In addition, the grouting repair construction has taken up most of the skylight period time, and the final setting time of 92 minutes after the construction is completed is too long, and it is also difficult to meet the driving conditions.

To sum up, the grouting repair materials in the prior art are difficult to meet the requirements of rapid underwater repair projects for the emptying and settlement of railway tunnel track beds.

SUMMARY OF THE INVENTION

The invention provides a fast-setting adjustable cement-based underwater anti-dispersion ultra-fast hard grouting material, which has the advantages of low cost, fast hardening, high early strength, good underwater dispersion resistance, adjustable setting time, easy construction and no pipe blockage. Etc.

Another object of the present invention is to provide a preparation method of a quick-setting adjustable type cement-based underwater anti-dispersion ultra-fast hard grouting material, which is simple, efficient and low in cost.

Another object of the present invention is to provide the application of a quick-setting adjustable type cement-based underwater anti-dispersion ultra-fast hard grouting material.

The specific technical scheme of the present invention is as follows:

A quick-setting adjustable cement-based underwater anti-dispersion ultra-fast hard grouting material, comprising A component and B component;

Described A component includes following mass percentage raw material:

80%-90% of cementitious material, 3%-10% of active admixture, 3%-7% of swelling agent, 2%-3% of high-performance underwater anti-dispersing agent, 0.1% of high-performance polycarboxylate superplasticizer ~0.3%;

The sum of the above-mentioned raw materials of component A is 100%;

Described B component includes following mass percentage raw material:

Fast-hardening cementitious material 80%-90%, active admixture 4%-10%, swelling agent 3%-7%, high-performance underwater anti-dispersing agent 2%-3%, polycarboxylate high-performance water reducer 0.1%～0.3%, retarder 0.1%～0.2%, early strength agent 0.1%～0.2%, thixotropic agent 0.1%～0.15%, interface wetting agent 0.05%～0.1%;

The sum of the above raw materials for component B is 100%.

By dividing the grouting material into two components, A and B, the separately prepared single liquid can maintain a long working time, and can be prepared in advance to save time for grouting construction. The slurry prepared by the two components A and B according to the mass ratio is (0.3～1):1. After mixing, the setting and hardening speed is fast, the initial setting time is (5～10)min, and the final setting time is (10～15)min. The two-component grouting method effectively avoids the occurrence of blocked pipes and cleaning of grouting equipment during the construction process, resulting in the reduction of grouting efficiency during the skylight period.

The cementitious material of component A is one or more of ordinary Portland cement with strength grades of 42.5, 42.5R, 52.5 or 52.5R.

The fast-hardening cementitious material of component B is one or more of fast-hardening sulfoaluminate cements with strength grades of 42.5 and 52.5. After the ordinary Portland cement in the A component and the fast-hardening sulfoaluminate cement in the B component are mixed in a certain proportion, the fast-hardening sulfoaluminate cement consumes Ca(OH) ₂ and reduces the alkalinity of the cement. Accelerates the hydration of calcium silicate in ordinary Portland cement. At the same time as the hydration is accelerated, the anhydrous calcium sulfoaluminate in fast-hardening sulfoaluminate cement reacts with gypsum to form ettringite, which causes rapid coagulation and even flashing. The early strength of the mixed slurry is obviously improved. By adjusting the mixing ratio of components A and B, the degree of promotion of the hydration reaction can also be controlled, and then the coagulation time of the mixed slurry can be precisely regulated.

The active admixture in component A and component B is one or more of microbead powder, silica fume or anhydrite powder. The ball effect of the active admixture can improve the fluidity of the slurry, and its high activity can improve the strength of the consolidated body. Anhydrous calcium sulfate in anhydrite can also promote the formation of ettringite in the cementitious material and accelerate the coagulation speed. Among them, microbead powder specific surface area≧900m ² /kg, 28d activity index≧90%, SiO ₂ content in silica fume≧85%, 28d activity index≧85%, anhydrite powder SO ₃ content≧48%.

The expansion agent in the A component and the B component is a mixture of a plastic expansion agent and an expansion agent in the hardening period, and the mass ratio of the plastic expansion agent: the expansion agent in the hardening period=1-2:100. The plastic expansion agent is azodicarbonamide, and the expansion agent in the hardening period is a magnesium oxide expansion agent with an active reaction time of less than 300s. The plastic expansion agent can generate a large number of uniform micropores in the slurry before it is hardened, and form expansion pressure in the cracks and dead corners of the rock formation in the grouting area, which improves the grouting density. After the grouting slurry is hardened, the magnesia expansion agent can make the consolidated body continue to produce micro-expansion for a long time, and compensate for the later shrinkage of the cement-based grouting material.

The high-performance underwater anti-dispersing agent in component A and component B is a mixture of hydroxypropyl methyl cellulose ether, polyacrylamide, polyvinyl alcohol, and zeolite powder, and the mass ratio is hydroxypropyl methyl cellulose Cellulose ether: polyacrylamide: polyvinyl alcohol: zeolite powder=15-20:5-10:5-10:100. The anti-dispersing agent mainly plays the role of improving the underwater anti-dispersion performance of the grouting material. The fresh grouting slurry can be regarded as a dispersion system with solid-phase particles with an electric double layer on the surface. The neutralization reaction of the cement particles occurs and changes the potential on the surface of the cement particles, reducing the surface repulsion of the cement particles and reducing the distance between the cement particles. The neutralization of the charge also increases the attraction potential between the anti-dispersant and the cement particles. Cement particles form stable flocs under the action of van der Waals forces. Both polyacrylamide and hydroxypropyl methylcellulose ether are organic macromolecular compounds with long-chain structure. There are a large number of functional groups on the long chain. These functional groups can adsorb a large number of cement particles, and these cement particles can form aggregates and stabilize The presence. Adhesive polyvinyl alcohol with a high degree of polymerization and hydrophilic cellulose ether have good adhesion, which can optimize the flocculation effect; on the one hand, zeolite powder has a porous structure and strong adsorption, which can increase the cement slurry. On the other hand, zeolite powder contains a certain amount of active silicon dioxide and silicon dioxide, which can interact with calcium hydroxide, a hydration product of cement, to form a gel In the cement-based material with extremely fast hydration reaction in the early stage of the invention, the gelation effect is obvious. The viscosity specification of hydroxypropyl methyl cellulose ether used in the anti-dispersing agent is 40,000 to 200,000, the molecular weight of polyacrylamide is 8 to 20,000,000, and the polyvinyl alcohol is a polyvinyl alcohol with a molecular weight of 170,000 to 220,000. The compounded high-performance underwater anti-dispersing agent has excellent anti-dispersion performance and has little conflict with the deflocculating effect of the water reducing agent.

The water-reducing rate of the polycarboxylate high-performance water-reducing agent mortar in the A component and the B component is ≧ 20%. The water reducing agent improves the fluidity of the slurry.

The retarder in component B is one or more of sodium gluconate, tartaric acid, boric acid or citric acid. The retarder can adjust the setting time of components A and B, so that the slurry prepared by the two components has sufficient working time before mixing.

The early strength agent in component B is one or more of lithium carbonate or lithium chloride. The early strength agent can accelerate the hydration rate of cement, promote the development of the early strength of the consolidated body after the mixing of components A and B, and has no significant effect on the later strength. It has both early strength function and certain water reduction function.

The thixotropic agent in the B component is one or more of magnesium aluminum silicate, polyamide wax, metakaolin or sodium bentonite. The thixotropic agent can increase the thixotropy of the slurry and improve its self-leveling and self-compacting properties. During the stirring and grouting process, the thixotropic agent can improve the flow properties of the slurry. When the grouting is stopped, it is stimulated by alkali or sulfate. The transition from depolymerization to an aggregated state results in the formation of aluminosilicate networks similar to some natural minerals in the Earth's crust, increasing early strength.

The interface wetting agent in the B component is one or more of vinyltriethoxysilane or isobutyltriethoxysilane. The interface wetting agent can set up a "molecular bridge" between the interface of inorganic substances and organic substances, connect the two materials with different properties together, and improve the composite bond strength of high-performance underwater anti-dispersing agent and cement-based materials.

The preparation method of a quick-setting adjustable type cement-based underwater anti-dispersion ultra-fast hard grouting material provided by the invention comprises the following steps:

1) Preparation of component A: After stirring and mixing the cementitious material, active admixture, expansion agent and high-performance underwater anti-dispersing agent in the formula amount of the A component, then add the polycarboxylate high-performance reducer in the formula amount. The water agent is stirred and mixed to obtain component A;

2) Preparation of component B: After stirring and mixing the fast-hardening cementitious material, active admixture, expansion agent and high-performance underwater anti-dispersing agent in the formula in the B component, then add the formula in the B component. The remaining materials are stirred and mixed to obtain component B.

The preferred preparation method is:

1) Preparation of component A: Mix the cementitious material, active admixture, swelling agent and high-performance underwater anti-dispersing agent in the formula amount of the A component with a mixer for 5-10 minutes, and then add the formula amount of polymer. The carboxylic acid superplasticizer is stirred for 5 minutes to obtain the A component;

2) Preparation of component B: mix the fast-hardening cementitious material, active admixture, expansion agent and high-performance underwater anti-dispersing agent in the formula amount in component B with a mixer for 5-10 minutes, and then add B Continue to stir the remaining material of the formula amount in the component for 5min, and then obtain the B component.

The application of a quick-setting adjustable cement-based underwater anti-dispersion ultra-fast hard grouting material is used for the underwater emergency repair of empty foundations, especially for the rapid underwater repair of the empty settlement of railway tunnel subgrades.

Specifically, the application method is:

Add water and mix the A component to get the A component grouting slurry, and the B component add water and mix to get the B component grouting slurry. Mix the two components and inject them into the grouting filling area at the same time.

Among them, the A component is mixed with water to obtain the A component injection slurry, and the mass ratio of water to material is (0.25-0.28):1. Component B is mixed with water, and the mass ratio of water to material is the same as that of component A.

When the A component grouting material and the B component grouting material are injected into the grouting filling area at the same time, the mass ratio is (0.3~1):1.

Preferably, the application specific application method of the fast-setting adjustable cement-based underwater anti-dispersion ultra-fast hard grouting material is:

S1. After determining the grouting filling area where the foundation is empty, locate the drilling and clean it;

S2. Pour the A component grouting slurry into the pulse grouting machine, and the B component grouting slurry is poured into the pulse grouting machine. Turn on the pulse grouting machine to remove the air so that the grouting gun head is full and the slurry is released. Stop the machine and connect the grouting gun heads of the two grouting machines to the mixing equipment;

S3. Turn on two pulse grouting machines to start synchronous grouting;

S4. After the grouting gun head of the mixing equipment is grouting, select a grouting hole from the central area of the grouting filling to start grouting. After the saturated thick slurry is produced from the grouting holes on both sides, plug it with a cork or a hole cover in turn. until the entire area is filled with grouting.

The grouting repair material of the invention is a fast-setting adjustable cement-based underwater anti-dispersion ultra-fast hard grouting material, which has the advantages of low cost, simple preparation method and easy control of construction and application, and is mainly used in the void settlement area of the railway tunnel track bed. underwater rapid repair works. The material is divided into A and B components. The cementing materials of the two components are ordinary Portland cement and fast-hardening sulfoaluminate cement, both of which are cement-based materials, which are different from the existing conventional organic polymers. Grouting material and cement-water glass double-liquid grouting material. The slurry prepared by the two components is mixed with a high-performance underwater anti-dispersing agent, which can prevent the slurry from being washed out during underwater grouting, and the construction in the tunnel water seepage area is not affected. The prepared slurry is mixed with retarder, and has a workable time of 1-1.5h. It can also be adjusted according to the specific construction schedule by adjusting the amount of retarder to adjust the workable time of the slurry. Therefore, it can be prepared before grouting construction, which saves time for rapid repair and construction operations. After mixing, due to the different cement systems of the two slurries, hydration reaction, hardening and coagulation will occur quickly after mixing, which meets the needs of rapid repair. At the same time, by adjusting the grouting ratio of the two slurries, the hardening and coagulation speed of the mixed slurries can be adjusted in real time.

To sum up, compared with the prior art, the present invention has the following advantages:

1. The grouting materials of the present invention are all cement-based materials. Compared with organic polymer grouting materials, they are easy to construct, have low material costs, are stable in combination with inorganic concrete interfaces, have good aging resistance, are safe, non-toxic and pollution-free. .

2. The grouting material A and B components of the present invention set and harden quickly after mixing, and the two-component grouting method is more flexible, the grouting construction efficiency is high, and it is not easy to block the pipe, and A and B can be adjusted according to on-site construction requirements. The grouting ratio of the components allows precise adjustment of the setting time. Before mixing, the initial setting time of the two slurries prepared by components A and B is longer. After mixing, the initial setting time of the slurry is 5-10 minutes, and the final setting time is ≤ 15 minutes. By further adjusting the ratio of components A and B, a larger range can be achieved. control the setting time of the mixed slurry.

3. The consolidated body of the grouting material of the present invention has high strength. The strength of the organic polymer grouting material is generally only within 1 MPa during the emergency repair skylight period of the railway tunnel, and the cement-water glass double-liquid grouting material can only reach within 3 MPa. The strength is extremely high, the 30min compressive strength is ≥15MPa, and the 3d compressive strength is ≥30MPa, which fully meets the driving conditions of the operating railway tunnel skylight after emergency repair.

4. The grouting material of the present invention has good underwater dispersion resistance, and the prepared slurry is not easy to be washed away during the underwater grouting process, and can achieve the effect of dense drainage and filling in the cavity area. 30min water and land compressive strength ratio ≥ 80%, 3d water and land compressive strength ratio ≥ 85%.

Detailed ways

Example 1

The present invention will be further described below in conjunction with examples, but the content of the present invention is not limited to the following examples.

Example 1

A quick-setting adjustable cement-based underwater anti-dispersion ultra-fast hard grouting material is composed of A component and B component, in terms of mass percentage, A component formula: 80% of cementitious material, active admixture 10%, swelling agent 7%, high-performance underwater anti-dispersing agent 2.7%, polycarboxylate high-performance water reducer 0.3%; formula of component B: 80% fast-hardening cementitious material, 9.5% active admixture, swelling Agent 7%, high-performance underwater anti-dispersing agent 2.7%, polycarboxylate high-performance water reducer 0.3%, sodium gluconate 0.2%, lithium carbonate 0.1%, magnesium aluminum silicate 0.1%, isobutyl triethoxy Silane 0.1%. The cementitious material is ordinary Portland cement with a strength grade of 52.5; the fast-hardening cementitious material is a rapid-hardening sulfoaluminate cement with a strength grade of 42.5; the active admixture is a specific surface area≧900m ² /kg , 28d microbead powder with activity index ≧90%; the expansion agent is compounded by azodicarbonamide and magnesium oxide expansion agent with an active reaction time of 180s, and the mass ratio is azodicarbonamide:magnesium oxide expansion agent=1:100; the high-performance underwater anti-dispersing agent is composed of hydroxypropyl methylcellulose ether with a viscosity of 100,000, polyacrylamide with a molecular weight of 10 million, polyvinyl alcohol with a molecular weight of 200,000, and zeolite powder Compounded, the mass ratio is hydroxypropyl methyl cellulose ether: polyacrylamide: polyvinyl alcohol: zeolite powder = 15:5:5:100; Rate≧20%.

The preparation method of the quick-setting adjustable type cement-based underwater anti-dispersion ultra-fast hard grouting material comprises the following steps:

1) Preparation of component A: firstly mix the cementitious material, active admixture, expansion agent and high-performance underwater anti-dispersing agent according to the formula for 5 minutes, and then add the polycarboxylate high-performance polycarboxylate according to the formula. The water reducing agent was stirred for 5 minutes to obtain component A.

2) Preparation of component B: firstly stir the fast-hardening cementitious material, active admixture, expansion agent and high-performance underwater anti-dispersing agent according to the formula for 5 minutes, and then add the remaining materials of the formula and stir 5min, the B component is obtained.

The application of the quick-setting adjustable type cement-based underwater anti-dispersion ultra-fast hard grouting material is used for grouting repair of foundation voids. The specific application method includes the following steps:

S1. After determining the grouting filling area where the foundation is empty, locate and clean up the drilling.

S2. Pour the A-component single liquid and the B-component single liquid prepared by adding water into two pulse grouting machines respectively, open the pulse grouting machine to remove the air to make the grouting gun head full and then stop the grouting. The grouting gun heads of the two grouting machines are connected with the mixing equipment.

S3. Turn on two pulse grouting machines to start synchronous grouting.

S4. After the grouting gun head of the mixing equipment is grouting, select a grouting hole from the central area of the grouting filling to start grouting. After the saturated thick slurry is produced from the grouting holes on both sides, plug it with a cork or a hole cover in turn. until the entire area is filled with grouting.

In the step S2, the A component is added with water to prepare a single liquid of the A component; the B component is added with water to prepare a single liquid of the B component. When adding water, the mass ratio of water to material should be the same, which is 0.25:1.

During the synchronous grouting in the step S3, the grouting ratio of the two single liquids prepared by adding water to the A and B components is 0.3:1 by mass ratio.

Example 2

A quick-setting adjustable cement-based underwater anti-dispersion ultra-fast hard grouting material is composed of A component and B component, in terms of mass percentage, A component formula: 85% of cementitious material, active admixture 7%, swelling agent 5%, high-performance underwater anti-dispersing agent 2.8%, polycarboxylate high-performance water reducer 0.2%; formula of component B: 85% fast-hardening cementitious material, 6.5% active admixture, swelling 5%, high-performance underwater anti-dispersing agent 2.8%, polycarboxylate high-performance water reducer 0.2%, sodium gluconate 0.2%, lithium chloride 0.1%, polyamide wax 0.1%, isobutyl triethoxy Silane 0.1%. The cementitious material is ordinary Portland cement with a strength grade of 52.5; the fast-hardening cementitious material is a rapid-hardening sulfoaluminate cement with a strength grade of 42.5; the active admixture is a specific surface area≧900m ² /kg , 28d microbead powder with activity index ≧90%; the expansion agent is compounded by azodicarbonamide and magnesium oxide expansion agent with an active reaction time of 180s, and the mass ratio is azodicarbonamide:magnesium oxide expansion agent = 2:100; the high-performance underwater anti-dispersing agent is composed of hydroxypropyl methyl cellulose ether with a viscosity of 100,000, polyacrylamide with a molecular weight of 20 million, polyvinyl alcohol with a molecular weight of 200,000, and zeolite The powder is compounded, and the mass ratio is hydroxypropyl methyl cellulose ether: polyacrylamide: polyvinyl alcohol: zeolite powder = 17:7:7:100; Water rate ≧ 20%.

The preparation method of the fast-setting adjustable type cement-based underwater anti-dispersion ultra-fast hard grouting material, the preparation method is:

1) Preparation of component A: firstly mix the cementitious material, active admixture, expansion agent and high-performance underwater anti-dispersing agent in the prescribed amount with a mixer for 7 minutes, and then add the prescribed amount of polycarboxylate high-performance The water reducing agent was stirred for 5 minutes to obtain component A.

2) Preparation of component B: firstly stir the fast-hardening cementitious material, active admixture, expansion agent and high-performance underwater anti-dispersing agent according to the formula for 7 minutes, and then add the remaining materials in the formula and stir 5min, the B component is obtained.

The application method of the grouting material is the same as that of Example 1, except that the dosage ratio of each raw material in the grouting material and the preparation method of the grouting material are in accordance with Example 2.

Example 3

A quick-setting adjustable cement-based underwater anti-dispersion ultra-fast hard grouting material is composed of A component and B component, in terms of mass percentage, A component formula: 90% of cementitious material, active admixture 4%, swelling agent 3%, high-performance underwater anti-dispersing agent 2.9%, polycarboxylate high-performance water reducer 0.1%; formula of component B: 90% fast-hardening cementitious material, 3.5% active admixture, swelling Agent 3%, high-performance underwater anti-dispersing agent 2.9%, polycarboxylate high-performance water reducer 0.1%, sodium gluconate 0.2%, lithium carbonate 0.1%, magnesium aluminum silicate 0.1%, vinyltriethoxysilane 0.1%. The cementitious material is ordinary Portland cement with a strength grade of 52.5; the fast-hardening cementitious material is a fast-hardening sulfoaluminate cement with a strength grade of 52.5; the active admixture is a specific surface area≧900m ² /kg , 28d microbead powder with activity index ≧90%; the expansion agent is compounded by azodicarbonamide and magnesium oxide expansion agent with an active reaction time of 120s, and the mass ratio is azodicarbonamide:magnesium oxide expansion agent=1:100; the high-performance underwater anti-dispersing agent is composed of hydroxypropyl methyl cellulose ether with a viscosity of 200,000, polyacrylamide with a molecular weight of 20 million, polyvinyl alcohol with a molecular weight of 200,000, The zeolite powder is compounded, and the mass ratio is hydroxypropyl methyl cellulose ether: polyacrylamide: polyvinyl alcohol: zeolite powder = 20:10:10:100; the polycarboxylate high-performance water reducing agent mortar Water reduction rate ≧ 20%.

The preparation method of the grouting material, the preparation method is:

1) Preparation of component A: firstly mix the cementitious material, active admixture, swelling agent and high-performance underwater anti-dispersing agent according to the formula for 10 minutes, and then add the polycarboxylate high-performance polycarboxylate according to the formula. The water reducing agent was stirred for 5 minutes to obtain component A.

2) Preparation of component B: firstly mix the fast-hardening cementitious material, active admixture, expansion agent and high-performance underwater anti-dispersing agent according to the formula for 10 minutes, and then add the remaining materials in the formula and stir 5min, that is, component B is obtained.

The application method of the grouting material is the same as that in Example 1, except that the dosage ratio of each raw material in the grouting material and the preparation method of the grouting material are in accordance with Example 3.

Example 4

A quick-setting adjustable cement-based underwater anti-dispersion ultra-fast hard grouting material, the raw material composition of which is compared with that of Example 1, the cementitious material of Example 4 is ordinary Portland cement with a strength grade of 42.5, with active admixture. The composite material is silica fume with SiO ₂ content ≧ 85% and 28d activity index ≧ 85%, and the rest are the same as in Example 1.

The preparation method of the grouting material is the same as that in Example 1, except that the dosage ratio of each raw material is in accordance with Example 4.

The application method of the grouting material is the same as that of Example 1, except that the dosage ratio of each raw material in the grouting material and the preparation method of the grouting material are in accordance with Example 4.

Example 5

A quick-setting adjustable cement-based underwater anti-dispersion ultra-fast hard grouting material, the raw material composition of which is compared with Example 1, the active admixture of this example is anhydrite powder with SO ₃ content ≧ 48%, The rest are the same as in Example 1.

The preparation method of the fast-setting adjustable type cement-based underwater anti-dispersion ultra-fast hard grouting material is the same as that in Example 1, except that the dosage ratio of each raw material is in accordance with Example 5.

The application method of the fast-setting adjustable cement-based underwater anti-dispersion ultra-fast hard grouting material is the same as that in Example 1, except that the dosage ratio of each raw material in the grouting material and the preparation method of the grouting material are in accordance with the examples. 5.

Example 6

A quick-setting adjustable cement-based underwater anti-dispersion ultra-fast hard grouting material is composed of A component and B component. In terms of mass percentage, the formula of component A: 85.8% of cementitious material, active admixture 7%, swelling agent 5%, high-performance underwater anti-dispersing agent 2%, polycarboxylate high-performance water reducing agent 0.2%; B component formula: fast-hardening cementitious material 85.8%, active admixture 6.5%, swelling Agent 5%, high-performance underwater anti-dispersing agent 2%, polycarboxylate high-performance water reducer 0.2%, sodium gluconate 0.2%, lithium carbonate 0.1%, magnesium aluminum silicate 0.1%, isobutyl triethoxy Silane 0.1%. The cementitious material is ordinary Portland cement with a strength grade of 52.5; the fast-hardening cementitious material is a rapid-hardening sulfoaluminate cement with a strength grade of 42.5; the active admixture is a specific surface area≧900m ² /kg , 28d microbead powder with activity index ≧90%; the expansion agent is compounded by azodicarbonamide and magnesium oxide expansion agent with an active reaction time of 180s, and the mass ratio is azodicarbonamide:magnesium oxide expansion agent=2:100; the high-performance underwater anti-dispersing agent is composed of hydroxypropyl methyl cellulose ether with a viscosity of 100,000, polyacrylamide with a molecular weight of 10 million, polyvinyl alcohol with a molecular weight of 200,000, and zeolite The powder is compounded, and the mass ratio is hydroxypropyl methyl cellulose ether: polyacrylamide: polyvinyl alcohol: zeolite powder = 15:5:5:100; Water rate ≧ 20%.

The preparation method of the fast-setting adjustable type cement-based underwater anti-dispersion ultra-fast hard grouting material is the same as that in Example 1, except that the dosage ratio of each raw material is in accordance with Example 6.

The application method of the fast-setting adjustable type cement-based underwater anti-dispersion ultra-fast hard grouting material is the same as that in Example 1, except that the dosage ratio of each raw material in the grouting material and the preparation method of the grouting material are in accordance with the examples. 6.

Example 7

A quick-setting adjustable cement-based underwater anti-dispersion ultra-fast hard grouting material is composed of A component and B component, in terms of mass percentage, A component formula: 84.8% of cementitious material, active admixture 7%, swelling agent 5%, high-performance underwater anti-dispersing agent 3%, polycarboxylate high-performance water reducing agent 0.2%; formula of component B: 84.8% of fast-hardening cementitious material, 6.5% of active admixture, swelling Agent 5%, high-performance underwater anti-dispersing agent 3%, polycarboxylate high-performance water reducer 0.2%, sodium gluconate 0.2%, lithium carbonate 0.1%, magnesium aluminum silicate 0.1%, isobutyl triethoxy Silane 0.1%. The cementitious material is ordinary Portland cement with a strength grade of 52.5; the fast-hardening cementitious material is a fast-hardening sulfoaluminate cement with a strength grade of 52.5; the active admixture is a specific surface area≧900m ² /kg , 28d microbead powder with activity index ≧90%; the expansion agent is compounded by azodicarbonamide and magnesium oxide expansion agent with an active reaction time of 120s, and the mass ratio is azodicarbonamide:magnesium oxide expansion agent = 1:100; the high-performance underwater anti-dispersing agent is composed of hydroxypropyl methyl cellulose ether with a viscosity of 200,000, polyacrylamide with a molecular weight of 20 million, polyvinyl alcohol with a molecular weight of 200,000, and zeolite The powder is compounded, and the mass ratio is hydroxypropyl methyl cellulose ether: polyacrylamide: polyvinyl alcohol: zeolite powder = 15:5:5:100; Water rate ≧ 20%.

The preparation method of the quick-setting adjustable type cement-based underwater anti-dispersion ultra-fast hard grouting material is the same as that in Example 1, the difference is that the dosage ratio of each raw material is in accordance with Example 7.

The application method of the fast-setting adjustable cement-based underwater anti-dispersion ultra-fast hard grouting material is the same as that in Example 1, except that the dosage ratio of each raw material in the grouting material and the preparation method of the grouting material are in accordance with the examples. 7.

Example 8

A quick-setting adjustable type cement-based underwater anti-dispersion ultra-fast hard grouting material, its raw material composition is compared with that of embodiment 1, the retarder of this embodiment is citric acid, and the rest are the same as those of embodiment 1.

The preparation method of the quick-setting adjustable type cement-based underwater anti-dispersion ultra-fast hard grouting material is the same as that in Example 1, except that the dosage ratio of each raw material is in accordance with Example 8.

The application method of the fast-setting adjustable type cement-based underwater anti-dispersion ultra-fast hard grouting material, compared with Example 1, in the step S2 of this example, the mass ratio of water to material when components A and B are mixed with water is: 0.28:1, the rest are the same as in Example 1.

Example 9

A quick-setting adjustable cement-based underwater anti-dispersion ultra-fast hard grouting material, the raw material composition of which is compared with Example 1, the cementitious material in this example is ordinary Portland cement with a strength grade of 42.5R, and the rest Same as Example 1.

The preparation method of the grouting material is the same as that in Example 1, except that the dosage ratio of each raw material is in accordance with Example 9.

In the application method of the grouting material, compared with Example 1, the grouting ratio of the two single liquids prepared by adding water to components A and B during simultaneous grouting in step S3 of this embodiment is 0.5:1 by mass ratio , and the rest are the same as in Example 1.

Example 10

A fast-setting adjustable cement-based underwater anti-dispersion ultra-fast hard grouting material, the raw material composition of which is compared with Example 1, the cementitious material of this example is ordinary Portland cement with a strength grade of 52.5R, and the rest Same as Example 1.

The preparation method of the quick-setting adjustable type cement-based underwater anti-dispersion ultra-fast hard grouting material is the same as that in Example 1, except that the dosage ratio of each raw material is in accordance with Example 10.

The application method of the quick-setting adjustable type cement-based underwater anti-dispersion ultra-fast hard grouting material, compared with the embodiment 1, the two prepared by adding water to the A and B components during simultaneous grouting in step S3 of this embodiment. The grouting ratio of the single liquid is 1:1 by mass ratio, and the rest are the same as in Example 1.

Comparative Example 1

A grouting material is composed of A component and B component, in terms of mass percentage, A component formula: 95% of cementitious material, 1% of active admixture, 1% of expansion agent, high-performance underwater anti-dispersion 2.9% of polycarboxylate superplasticizer, 0.1% of polycarboxylate high-performance water-reducing agent; formula of component B: 95% of fast-hardening cementitious material, 0.5% of active admixture, 1% of swelling agent, 2.9% of high-performance underwater anti-dispersing agent, Polycarboxylate superplasticizer 0.1%, sodium gluconate 0.2%, lithium carbonate 0.1%, magnesium aluminum silicate 0.1%, isobutyltriethoxysilane 0.1%. The cementitious material is ordinary Portland cement with a strength grade of 52.5; the fast-hardening cementitious material is a rapid-hardening sulfoaluminate cement with a strength grade of 42.5; the active admixture is a specific surface area≧900m ² /kg , 28d microbead powder with activity index ≧90%; the expansion agent is compounded by azodicarbonamide and magnesium oxide expansion agent with an active reaction time of 180s, and the mass ratio is azodicarbonamide:magnesium oxide expansion agent = 1:100; the high-performance underwater anti-dispersing agent is composed of hydroxypropyl methyl cellulose ether with a viscosity of 100,000, polyacrylamide with a molecular weight of 10 million, polyvinyl alcohol with a molecular weight of 200,000, and zeolite The powder is compounded, and the mass ratio is hydroxypropyl methyl cellulose ether: polyacrylamide: polyvinyl alcohol: zeolite powder = 15:5:5:100; Water rate ≧ 20%.

The preparation method of the grouting material is the same as that of Example 1, except that the dosage ratio of each raw material is in accordance with Comparative Example 1.

The application method of the grouting material is the same as that of Example 1, except that the dosage ratio of each raw material in the grouting material and the preparation method of the grouting material are in accordance with Comparative Example 1.

Comparative Example 2

A grouting material is composed of two components, A and B. In terms of mass percentage, the formula of component A: 75% of cementitious material, 15% of active admixture, 7% of expansion agent, high-performance underwater anti-dispersion 2.7% of polycarboxylate superplasticizer, 0.3% of polycarboxylate high-performance water-reducing agent; formula of component B: 75% of fast-hardening cementitious material, 14.5% of active admixture, 7% of swelling agent, 2.7% of high-performance underwater anti-dispersing agent, Polycarboxylate superplasticizer 0.3%, sodium gluconate 0.2%, lithium carbonate 0.1%, magnesium aluminum silicate 0.1%, isobutyltriethoxysilane 0.1%. The cementitious material is ordinary Portland cement with a strength grade of 52.5; the fast-hardening cementitious material is a fast-hardening sulfoaluminate cement with a strength grade of 52.5; the active admixture is a specific surface area≧900m ² /kg , 28d microbead powder with activity index ≧90%; the expansion agent is compounded by azodicarbonamide and magnesium oxide expansion agent with an active reaction time of 180s, and the mass ratio is azodicarbonamide:magnesium oxide expansion agent = 2:100; the high-performance underwater anti-dispersing agent is composed of hydroxypropyl methyl cellulose ether with a viscosity of 100,000, polyacrylamide with a molecular weight of 20 million, polyvinyl alcohol with a molecular weight of 200,000, and zeolite The powder is compounded, and the mass ratio is hydroxypropyl methyl cellulose ether: polyacrylamide: polyvinyl alcohol: zeolite powder = 20:10:10:100; Water rate ≧ 20%.

The preparation method of the grouting material is the same as that of Example 1, except that the dosage ratio of each raw material is in accordance with Comparative Example 2.

The application method of the grouting material is the same as that of Example 1, except that the dosage ratio of each raw material in the grouting material and the preparation method of the grouting material are in accordance with Comparative Example 2.

Comparative Example 3

A grouting material is composed of two components, A and B. According to the mass percentage, the formula of component A: 81.7% of cementitious material, 10% of active admixture, 7% of expansion agent, high-performance underwater anti-dispersion 1% of polycarboxylate superplasticizer, 0.3% of polycarboxylate high-performance water reducer; formula of component B: 81.7% of fast-hardening cementitious material, 9.5% of active admixture, 7% of swelling agent, 1% of high-performance underwater anti-dispersing agent, Polycarboxylate superplasticizer 0.3%, sodium gluconate 0.2%, lithium carbonate 0.1%, magnesium aluminum silicate 0.1%, isobutyltriethoxysilane 0.1%. The cementitious material is ordinary Portland cement with a strength grade of 52.5; the fast-hardening cementitious material is a rapid-hardening sulfoaluminate cement with a strength grade of 42.5; the active admixture is a specific surface area≧900m ² /kg , 28d microbead powder with activity index ≧90%; the expansion agent is compounded by azodicarbonamide and magnesium oxide expansion agent with an active reaction time of 120s, and the mass ratio is azodicarbonamide:magnesium oxide expansion agent = 1:100; the high-performance underwater anti-dispersing agent is composed of hydroxypropyl methyl cellulose ether with a viscosity of 200,000, polyacrylamide with a molecular weight of 20 million, polyvinyl alcohol with a molecular weight of 200,000, and zeolite The powder is compounded, and the mass ratio is hydroxypropyl methyl cellulose ether: polyacrylamide: polyvinyl alcohol: zeolite powder = 15:5:5:100; Water rate ≧ 20%.

The preparation method of the grouting material is the same as that of Example 1, the difference is that the dosage ratio of each raw material is in accordance with Comparative Example 3.

The application method of the grouting material is the same as that of Example 1, except that the dosage ratio of each raw material in the grouting material and the preparation method of the grouting material are in accordance with Comparative Example 3.

Comparative Example 4

A grouting material whose raw material composition is the same as that of Example 1.

The preparation method of the grouting material is the same as that of Example 1.

The application method of the grouting material, compared with Example 1, is different in that the grouting ratio of the two single liquids prepared by adding water to components A and B during simultaneous grouting in step S3 of this embodiment is 1.5 by mass ratio. : 1, and the rest are the same as in Example 1.

With reference to the methods in the following standards, the performance testing of the grouting materials prepared in each example and comparative example is carried out:

The detection of initial setting time and final setting time is carried out with reference to GB/T 1346-2011, and the compressive strength is carried out with reference to GB/T 17671-1999. The experimental method of the water-land strength ratio also refers to GB/T 17671-1999, the difference is that when the test block is formed, the strength of the water test block is formed underwater. The performance test results of the grouting materials prepared in each example and the comparative example are shown in Table 1 below.

Table 1 Properties of grouting materials prepared by each example and comparative example

It can be seen from the results in Table 1 that, compared with Comparative Examples 1-4, Examples 1-10 of the present invention can achieve rapid setting and rapid hardening of the mixed slurry by adjusting the ratio of components A and B in the grouting material. After the initial setting time of the slurry is 5 to 10 minutes, the final setting time is less than or equal to 15 minutes. By further adjusting the ratio of components A and B, the setting time of the mixed slurry can be adjusted in a wider range. The early strength of the consolidated body is high, the 30min compressive strength is greater than or equal to 15MPa, and the 3d compressive strength is greater than or equal to 30MPa, which meets the driving requirements after emergency repairs during the window period. The underwater anti-dispersing agent ensures the underwater anti-dispersion of the slurry, the 30min water-land compressive strength ratio is ≥80%, and the 3d water-land compressive strength ratio is ≥85%.

The above test results show that the grouting material of the present invention has the characteristics of fast setting and hardening, high early strength, good underwater dispersion resistance, and adjustable setting time, etc.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, without departing from the inventive concept of the present invention, some improvements and transformations made are all It belongs to the protection scope of the present invention.

Claims (8)

1. a quick-setting adjustable type cement-based underwater anti-dispersion ultra-fast hard grouting material, it is characterized in that, described quick-setting adjustable type cement-based underwater anti-dispersion ultra-fast hard grouting material comprises A component and component B; Described A component includes following mass percentage raw material: 80%-90% of cementitious material, 3%-10% of active admixture, 3%-7% of swelling agent, 2%-3% of high-performance underwater anti-dispersing agent, 0.1% of high-performance polycarboxylate superplasticizer ~0.3%; The sum of the above-mentioned raw materials of component A is 100%; Described B component includes following mass percentage raw material: Fast-hardening cementitious material 80%-90%, active admixture 4%-10%, swelling agent 3%-7%, high-performance underwater anti-dispersing agent 2%-3%, polycarboxylate high-performance water reducer 0.1%～0.3%, retarder 0.1%～0.2%, early strength agent 0.1%～0.2%, thixotropic agent 0.1%～0.15%, interface wetting agent 0.05%～0.1%; The sum of the above-mentioned raw materials of component B is 100%; The high-performance underwater anti-dispersing agent in component A and component B is a mixture of hydroxypropyl methyl cellulose ether, polyacrylamide, polyvinyl alcohol, and zeolite powder, and the mass ratio is hydroxypropyl methyl cellulose Cellulose ether: polyacrylamide: polyvinyl alcohol: zeolite powder=15～20:5～10:5～10:100; The expansion agent in the A component and the B component is a mixture of the plastic expansion agent and the expansion agent in the hardening period; the mass ratio of the plastic expansion agent: the expansion agent in the curing period=1-2:100. 2. The fast-setting adjustable type cement-based underwater anti-dispersion ultra-fast-hardening grouting material according to claim 1, wherein the fast-hardening cementitious material described in component B is a fast-hardening material with strength grades of 42.5 and 52.5. One or more of sulfoaluminate cements. 3. The quick-setting adjustable type cement-based underwater anti-dispersion ultra-fast hard grouting material according to claim 1 or 2 is characterized in that, the active admixture described in the A component and the B component is microbeads One or more of powder, silica fume or anhydrite powder. 4. quick-setting adjustable type cement-based underwater anti-dispersion ultra-fast hard grouting material according to claim 1, is characterized in that, in B component, early strength agent is a kind of in lithium carbonate or lithium chloride or several. 5. quick-setting adjustable type cement-based underwater anti-dispersion ultra-fast hard grouting material according to claim 1, is characterized in that, in the B component, the thixotropic agent is magnesium aluminum silicate, polyamide wax, metakaolin Or one or more of sodium bentonite. 6. The fast-setting adjustable type cement-based underwater anti-dispersion ultra-fast hard grouting material according to claim 1 is characterized in that, the interface sizing agent described in the B component is vinyl triethoxy silane or isopropyl alcohol. One or more of butyltriethoxysilane. 7. a preparation method of the quick-setting adjustable type cement-based underwater anti-dispersion ultra-fast hard grouting material described in any one of claims 1-6, is characterized in that, described preparation method is: 1) Preparation of component A: After stirring and mixing the cementitious material, active admixture, expansion agent and high-performance underwater anti-dispersing agent in the formula amount of the A component, then add the polycarboxylate high-performance reducer in the formula amount. The water agent is stirred and mixed to obtain component A; 2) Preparation of component B: After stirring and mixing the fast-hardening cementitious material, active admixture, swelling agent and high-performance underwater anti-dispersing agent in the formula in the B component, then add the formula in the B component. The remaining materials are stirred and mixed to obtain component B. 8. the application of the quick-setting adjustable type cement-based underwater anti-dispersion ultra-fast hard grouting material according to any one of claims 1-6, it is characterized in that, it is used for the underwater emergency repair of empty foundation, during application, A The dosage and mass ratio of component and component B is 0.3-1:1.