CN105777035A - Concrete crack grouting repairing material prepared from calcium silicate hydrate crystal seed powder and use method of material - Google Patents
Concrete crack grouting repairing material prepared from calcium silicate hydrate crystal seed powder and use method of material Download PDFInfo
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- CN105777035A CN105777035A CN201610108020.XA CN201610108020A CN105777035A CN 105777035 A CN105777035 A CN 105777035A CN 201610108020 A CN201610108020 A CN 201610108020A CN 105777035 A CN105777035 A CN 105777035A
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- calcium silicate
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the field of building construction materials, in particular to a concrete crack grouting repairing material prepared from calcium silicate hydrate crystal seed powder and a use method of the material.The concrete crack grouting repairing material is prepared from ordinary Portland cement, the calcium silicate hydrate crystal seed powder, hydroxymethyl cellulose ether, dispersible adhesive powder, gypsum, a naphthalene sulfonated formaldehyde condensate water reducing agent, limestone powder and alunite.The concrete crack grouting repairing material can be used for rapidly repairing concrete cracks of a building structure, and therefore the mechanical property and durability of the concrete structure are improved, and the service life of the building is prolonged.The concrete crack grouting repairing material is suitable for repairing of cracks of concrete structures such as reinforced concrete structures, concrete pavements, bridges and water conservancy projects.
Description
Technical field
The present invention relates to building materials field, be specifically related to a kind of grouting material for repairing crack of concrete utilizing hydrated calcium silicate seed powder to prepare and using method thereof.
Background technology
Along with the range of application of concrete material structure extends day by day, concrete material is had higher requirement by people.But, concrete also has self intrinsic shortcomings and deficiencies, often occurs that seepage waits degradation phenomena with permeable, and this is not the material that a kind of homogeneity is high mainly due to concrete, there is more detrimental voids and crack inside it.Particularly crack, it is possible to be called commonly encountered diseases and the frequently-occurring disease of concrete material, concrete mechanics intensity and durability are all had significant impact by the feature such as its quantity, form, distribution.At present, domestic many buildings of the remote past and the not good engineering structure of construction quality are all in state to be repaired due to problems such as surface cracks, for the repairing in crack, relatively straightforward method is aiming at concrete crack and carries out grouting mending process.
Domestic in recent years that the research of grouting patching material is very active and have made great progress, from the performance of material with become present aspect all to have breakthrough.But inorganic grouting material domestic generally is substantially to rely on and adds expansion component and water-keeping thickening component in portland cement, or take the means such as compounded special cement, cement slurry is made to be internally formed substantial amounts of entringite etc., it is thus achieved that to have the grouting material of the performances such as early strong, high-strength, microdilatancy.As disclosed in patent No. CN200410016578.2, " grouting material for repairing crack of concrete " utilizes Portland cement, cellulose, poly-vinegar acetas latex powder, naphthalene sulfonic acid-formaldehyde condensation product water reducer, calcium sulphoaluminate, Gypsum Fibrosum, agstone to prepare the crack patching material that performance is relatively stable；What and for example New Building Materials magazines Mulberry state ministers in 2007 etc. were delivered is entitled as " experimentation of cement based ungauged regions composite grout " literary composition, have studied portland cement and aluminate cement and in right amount other Material cladding prepare the specific performance of high-quality cement based ungauged regions composite grouting material.These materials are all from the patching material quickly generating entringite angle design, but the often distribution in needle-like of ettringite structure, its too much formation in material internal Local enrichment, can be concentrated by stress, often become the source of grouting patching material secondary cracking under load action；And have coating function for cement granules, it is unfavorable for the development of grouting material later stage microstructure, and then the endurance quality of grouting patching material can be affected.
Consider the generation having a large amount of hydrated calcium silicate (C-S-H) in the end product of hydrated reaction of cement, its forming process includes the growth of nucleation and crystal, and the addition of previously prepared hydrated calcium silicate seed powder will reduce the nucleation barrier of related crystalline hydrated product, and then promote tricalcium silicate (C in portland cement3S) hydration reaction, improves the mechanical property after grouting patching material hardening and durability.Therefore, the present inventor by the material mixing such as hydrated calcium silicate seed powder and portland cement, hydroxymethyl cellulose ether and Gypsum Fibrosum and levigate after, be developed into the grouting material for repairing crack of concrete of a kind of dependable performance.Relative to existing repairing concrete crack material, the present invention has that early strength height, cement consumption be relatively small and the advantage such as crack adhesion strength height, excellent in durability.
Through retrieval, in cement-based material, the principle of hydrated product crystallization prepares glued crack patching material, still belongs to the first time at home to utilize hydrated calcium silicate seed powder to promote.
Summary of the invention
It is an object of the invention to provide a kind of grouting material for repairing crack of concrete utilizing hydrated calcium silicate seed powder to prepare.
What the present invention proposed utilizes grouting material for repairing crack of concrete prepared by hydrated calcium silicate seed powder, being made up of Portland cement, hydrated calcium silicate seed powder, hydroxymethyl cellulose ether, re-dispersible glue powder, Gypsum Fibrosum, naphthalene sulfonic acid-formaldehyde condensation product water reducer, agstone and alunite, the weight ratio of each component is:
Portland cement 100
Hydrated calcium silicate seed powder 3-12
Hydroxymethyl cellulose ether 0.02-0.10
Re-dispersible glue powder 1.0-5.5
Gypsum Fibrosum 1.2-2.6
Naphthalene sulfonic acid-formaldehyde condensation product water reducer 0.6-1.2
Agstone 5-25
Alunite 2-12
Wherein: the synthesis step of hydrated calcium silicate seed powder is:
(1) ratio being 1.0-1.5 in the calcium silicon ratio ratio of the amount of substance of element silicon (calcium constituent with) set weighs calcium nitrate (Ca (NO3)2·4H2And sodium silicate (Na O)2SiO3·9H2O), being subsequently adding deionized water, controlling water-solid ratio (ratio of deionized water and calcareous material and siliceous material quality sum) is 5-25), by system mix homogeneously in container；
(2) adding mass concentration in mixed system is the sodium hydroxide solution of 30%, adjusts pH value to 12；
(3) then the container filling raw material is put in water-bath, after keeping (2-6) h at 65 DEG C of temperature, by scrubbed for products therefrom sucking filtration；
(4) in vacuum drying oven, keep temperature 60 C, carry out drying and processing, utilize ball mill that products therefrom is carried out the grinding of (20-30) min, grinding process should be avoided contact with water as far as possible.
Each component preferably weight ratio is:
Portland cement 100
Hydrated calcium silicate seed powder 5-9
Hydroxymethyl cellulose ether 0.04-0.06
Re-dispersible glue powder 2.2-3.0
Gypsum Fibrosum 1.6-2.2
Naphthalene sulfonic acid-formaldehyde condensation product water reducer 0.8-1.0
Agstone 10-15
Alunite 4-6
The preparation method is that: weigh each component by aforesaid part by weight, raw material mixed by physical mechanical and adopts ball mill grinding 5-10 minute, namely obtaining required product.
In the present invention, Portland cement, as after hydraulic cementing materials and water mix, can penetrate in distress in concrete, and hydration reaction occurs, and produces hydrated product, can form entirety with sides of fracture at short notice.The addition of hydrated calcium silicate seed powder reduces the consumption of cement, and can promote tricalcium silicate (C in portland cement3S) hydration reaction, is more likely formed the good hydrated calcium silicate of degree of crystallinity and calcium hydroxide crystals, and can improve the microstructure of Behavior of Hardened Cement Paste, improves durability.Hydroxymethyl cellulose ether is as water-keeping thickening component, it can be swelling in cement slurry, and by the adsorption of molecule, cement granules and pulverized limestone granule are linked together, reduce particles settling, ensure that the globality of material itself simultaneously, and do not produce excreting water phenomenon, on the other hand, its water retention makes moisture not easily evaporation loss, serves good Self-curing effect.Re-dispersible glue powder is remarkably improved the adhesion strength of patching material and sides of fracture；Gypsum Fibrosum can play the effect of slow setting in the material, it is ensured that slurry has good application property.The plastication of naphthalene sulfonic acid-formaldehyde condensation product Water-reducing Admixtures To Cements is relatively stable, improves the mobility of slurry, it is ensured that slurry flows into comparatively trickle crack smoothly.The effect of agstone can provide skeleton, convenient construction for cement slurry, with alunite generation effect, can reduce the contraction of patching material self simultaneously, improve the ability of repairing concrete crack.
In the present invention, described Portland cement strength grade is 42.5, and specific surface area is 360m2/ kg, presetting period 170min, final setting time is 240min.
The present invention is canescence fine-powdered material, and during use, suitable amount of water is the 20%-50% of grouting patching material weight, and concrete amount of water is determined according to the test of actual fluidity of slurry.
The present invention uses as grouting material for repairing crack of concrete, there is comparatively excellent water-retaining property and mobility, can have in the crack infiltrating through concrete surface, structure that can be complete with cracking initiation after hardening, and have and necessarily compensate contractility, can the generation of pre-cracking-proof further, mechanical property is all very excellent with durability.
The present invention, to inside concrete reinforcing bar non-corroding effect, is widely used in the grouting mending in the concrete structure cracks such as reinforced concrete structure, cement pavement, bridge and water conservancy project.
Detailed description of the invention
Embodiment 1, a kind of grouting material for repairing crack of concrete utilizing hydrated calcium silicate seed powder to prepare is by Portland cement 100, hydrated calcium silicate seed powder 3, hydroxymethyl cellulose ether 0.02, re-dispersible glue powder 1.0, Gypsum Fibrosum 1.2, naphthalene sulfonic acid-formaldehyde condensation product water reducer 0.6, agstone 8, the mass ratio of alunite 2 weighs rear mix homogeneously.After the water adding dry powder material 35% is stirred, product fluidity is up to 315mm, and latter 28 days tensile strength of hardening reaches 3.3MPa, and pressure is cut cementing strength and reached 5.9MPa, and after 9 freeze-thaw cycle, pressure cuts cementing strength reduction rate is 0%.
Embodiment 2, a kind of grouting material for repairing crack of concrete utilizing hydrated calcium silicate seed powder to prepare is by Portland cement weight ratio 100, hydrated calcium silicate seed powder 6, hydroxymethyl cellulose ether 0.05, re-dispersible glue powder 2.5, Gypsum Fibrosum 1.8, naphthalene sulfonic acid-formaldehyde condensation product water reducer 0.9, agstone 12, the mass ratio of alunite 5 weighs rear mix homogeneously.After the water adding dry powder material 42% is stirred, product fluidity is up to 330mm, and latter 28 days tensile strength of hardening reaches 4.4MPa, and pressure is cut cementing strength and reached 7.1MPa, and after 12 freeze-thaw cycle, pressure cuts cementing strength reduction rate is 0%.
Embodiment 3, a kind of grouting material for repairing crack of concrete utilizing hydrated calcium silicate seed powder to prepare is by Portland cement weight ratio 100, hydrated calcium silicate seed powder 12, hydroxymethyl cellulose ether 0.10, re-dispersible glue powder 5.5, Gypsum Fibrosum 2.6, naphthalene sulfonic acid-formaldehyde condensation product water reducer 1.2, agstone 25, the mass ratio of alunite 12 weighs rear mix homogeneously.After the water adding dry powder material 50% is stirred, product fluidity is up to 305mm, and latter 28 days tensile strength of hardening reaches 3.7MPa, and pressure is cut cementing strength and reached 6.3MPa, and after 12 freeze-thaw cycle, pressure cuts cementing strength reduction rate is 0%.
Claims (3)
1. one kind utilizes grouting material for repairing crack of concrete prepared by hydrated calcium silicate seed powder, it is characterized in that being made up of Portland cement, hydrated calcium silicate seed powder, hydroxymethyl cellulose ether, re-dispersible glue powder, Gypsum Fibrosum, naphthalene sulfonic acid-formaldehyde condensation product water reducer, agstone and alunite, the weight ratio of each component is:
Portland cement 100
Hydrated calcium silicate seed powder 3-12
Hydroxymethyl cellulose ether 0.02-0.10
Re-dispersible glue powder 1.0-5.5
Gypsum Fibrosum 1.2-2.6
Naphthalene sulfonic acid-formaldehyde condensation product water reducer 0.6-1.2
Agstone 5-25
Alunite 2-12
Wherein: the synthesis step of hydrated calcium silicate seed powder is:
(1) calcium nitrate and sodium silicate are weighed in the ratio that ratio is 1.0-1.5 of calcium constituent with the amount of substance of element silicon, it is subsequently adding deionized water, the ratio controlling deionized water and calcareous material and siliceous material quality sum is 5-25, by system mix homogeneously in container；
(2) adding mass concentration in the mixed system that step (1) obtains is the sodium hydroxide solution of 30%, adjusts pH value to 12；
(3) then the container filling raw material is put in water-bath, after keeping (2-6) h at 65 DEG C of temperature, by scrubbed for products therefrom sucking filtration；
(4) in vacuum drying oven, keep temperature 60 C, carry out drying and processing, utilize ball mill that products therefrom is carried out the grinding of (20-30) min, grinding process should be avoided contact with water as far as possible.
2. the grouting material for repairing crack of concrete utilizing hydrated calcium silicate seed powder to prepare according to claim 1, it is characterised in that each component weight ratio is:
Portland cement 100
Hydrated calcium silicate seed powder 5-9
Hydroxymethyl cellulose ether 0.04-0.06
Re-dispersible glue powder 2.2-3.0
Gypsum Fibrosum 1.6-2.2
Naphthalene sulfonic acid-formaldehyde condensation product water reducer 0.8-1.0
Agstone 10-15
Alunite 4-6.
3. the using method of the grouting material for repairing crack of concrete utilizing hydrated calcium silicate seed powder to prepare as claimed in claim 1, it is characterised in that add the water of this material weight 35%-50%, stir.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107777944A (en) * | 2016-08-30 | 2018-03-09 | 陈春来 | A kind of concrete formulation |
| CN108314345A (en) * | 2018-03-19 | 2018-07-24 | 东南大学 | A kind of method of mineral admixture surface in situ growth hydrated calcium silicate |
| CN108328977A (en) * | 2018-03-23 | 2018-07-27 | 常德市万福达环保节能建材有限公司 | A kind of concrete repairing material |
| CN109160762A (en) * | 2018-08-23 | 2019-01-08 | 武汉三源特种建材有限责任公司 | Cement quick-hardening additive and application thereof |
| CN109180117A (en) * | 2018-11-16 | 2019-01-11 | 石家庄铁道大学 | A kind of concrete structure appearance chromatic difference patching material and its construction method |
| CN109665737A (en) * | 2018-12-17 | 2019-04-23 | 湖北工业大学 | A kind of nanometer water mudstone early strength water-reducing agent for sulphate aluminium cement |
| CN109824293A (en) * | 2018-08-09 | 2019-05-31 | 河南理工大学 | Different siliceous raw materials synthesize the method for nanometer C-S-H gels and the application as early strength agent |
| CN111439981A (en) * | 2020-04-03 | 2020-07-24 | 中建材中岩科技有限公司 | Low-temperature sleeve grouting material for connecting steel bars and application method thereof |
| CN111470835A (en) * | 2020-06-03 | 2020-07-31 | 杭州市城市建设基础工程有限公司 | Method and process for repairing concrete cracks in road and bridge construction |
| CN113530282A (en) * | 2020-04-13 | 2021-10-22 | 南开大学 | Method for repairing concrete crack by silicate cement grouting |
| CN113979690A (en) * | 2021-10-13 | 2022-01-28 | 华润水泥技术研发有限公司 | Anti-saltpetering permeable concrete and preparation method thereof |
| CN114075084A (en) * | 2020-08-20 | 2022-02-22 | 四川上锦雅筑绿色科技有限公司 | Preparation method of high-calcium-silicon-ratio aerated brick and high-calcium-silicon-ratio aerated brick prepared by same |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107777944A (en) * | 2016-08-30 | 2018-03-09 | 陈春来 | A kind of concrete formulation |
| CN108314345A (en) * | 2018-03-19 | 2018-07-24 | 东南大学 | A kind of method of mineral admixture surface in situ growth hydrated calcium silicate |
| CN108328977B (en) * | 2018-03-23 | 2020-11-27 | 常德市万福达环保节能建材有限公司 | Concrete repairing material |
| CN108328977A (en) * | 2018-03-23 | 2018-07-27 | 常德市万福达环保节能建材有限公司 | A kind of concrete repairing material |
| CN109824293A (en) * | 2018-08-09 | 2019-05-31 | 河南理工大学 | Different siliceous raw materials synthesize the method for nanometer C-S-H gels and the application as early strength agent |
| CN109824293B (en) * | 2018-08-09 | 2021-05-25 | 河南理工大学 | Method for synthesizing nano C-S-H gel from different siliceous raw materials and application of nano C-S-H gel as early strength agent |
| CN109160762A (en) * | 2018-08-23 | 2019-01-08 | 武汉三源特种建材有限责任公司 | Cement quick-hardening additive and application thereof |
| CN109160762B (en) * | 2018-08-23 | 2021-04-16 | 武汉三源特种建材有限责任公司 | Cement quick-hardening additive and application thereof |
| CN109180117A (en) * | 2018-11-16 | 2019-01-11 | 石家庄铁道大学 | A kind of concrete structure appearance chromatic difference patching material and its construction method |
| CN109665737B (en) * | 2018-12-17 | 2021-08-13 | 湖北工业大学 | Nano-set early strength water reducing agent for sulphoaluminate cement |
| CN109665737A (en) * | 2018-12-17 | 2019-04-23 | 湖北工业大学 | A kind of nanometer water mudstone early strength water-reducing agent for sulphate aluminium cement |
| CN111439981A (en) * | 2020-04-03 | 2020-07-24 | 中建材中岩科技有限公司 | Low-temperature sleeve grouting material for connecting steel bars and application method thereof |
| CN111439981B (en) * | 2020-04-03 | 2022-02-15 | 中建材中岩科技有限公司 | Low-temperature sleeve grouting material for connecting steel bars and application method thereof |
| CN113530282A (en) * | 2020-04-13 | 2021-10-22 | 南开大学 | Method for repairing concrete crack by silicate cement grouting |
| CN111470835A (en) * | 2020-06-03 | 2020-07-31 | 杭州市城市建设基础工程有限公司 | Method and process for repairing concrete cracks in road and bridge construction |
| CN114075084A (en) * | 2020-08-20 | 2022-02-22 | 四川上锦雅筑绿色科技有限公司 | Preparation method of high-calcium-silicon-ratio aerated brick and high-calcium-silicon-ratio aerated brick prepared by same |
| CN114075084B (en) * | 2020-08-20 | 2023-01-10 | 四川滨水上锦绿色建材有限公司 | Preparation method of high-calcium-silicon-ratio aerated brick and high-calcium-silicon-ratio aerated brick prepared by same |
| CN113979690A (en) * | 2021-10-13 | 2022-01-28 | 华润水泥技术研发有限公司 | Anti-saltpetering permeable concrete and preparation method thereof |
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