CN109160762B - Cement quick-hardening additive and application thereof - Google Patents
Cement quick-hardening additive and application thereof Download PDFInfo
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- CN109160762B CN109160762B CN201810965756.8A CN201810965756A CN109160762B CN 109160762 B CN109160762 B CN 109160762B CN 201810965756 A CN201810965756 A CN 201810965756A CN 109160762 B CN109160762 B CN 109160762B
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- 239000004568 cement Substances 0.000 title claims abstract description 84
- 239000000654 additive Substances 0.000 title claims abstract description 46
- 230000000996 additive effect Effects 0.000 title claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 16
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 16
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 15
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 15
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 15
- 239000012153 distilled water Substances 0.000 claims abstract description 14
- 238000010008 shearing Methods 0.000 claims abstract description 14
- 238000002360 preparation method Methods 0.000 claims abstract description 13
- 230000000979 retarding effect Effects 0.000 claims abstract description 4
- 239000004567 concrete Substances 0.000 claims description 29
- 229910052602 gypsum Inorganic materials 0.000 claims description 10
- 239000010440 gypsum Substances 0.000 claims description 10
- 239000011575 calcium Substances 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 8
- 229910052791 calcium Inorganic materials 0.000 claims description 8
- 239000010703 silicon Substances 0.000 claims description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 239000011398 Portland cement Substances 0.000 claims description 7
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 6
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 5
- 229910052925 anhydrite Inorganic materials 0.000 claims description 5
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 5
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 5
- 235000011152 sodium sulphate Nutrition 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 2
- 229940103272 aluminum potassium sulfate Drugs 0.000 claims description 2
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 claims description 2
- 150000004683 dihydrates Chemical class 0.000 claims description 2
- INHCSSUBVCNVSK-UHFFFAOYSA-L lithium sulfate Inorganic materials [Li+].[Li+].[O-]S([O-])(=O)=O INHCSSUBVCNVSK-UHFFFAOYSA-L 0.000 claims description 2
- GRLPQNLYRHEGIJ-UHFFFAOYSA-J potassium aluminium sulfate Chemical compound [Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRLPQNLYRHEGIJ-UHFFFAOYSA-J 0.000 claims description 2
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 claims description 2
- 229910052939 potassium sulfate Inorganic materials 0.000 claims description 2
- 235000011151 potassium sulphates Nutrition 0.000 claims description 2
- RBTVSNLYYIMMKS-UHFFFAOYSA-N tert-butyl 3-aminoazetidine-1-carboxylate;hydrochloride Chemical compound Cl.CC(C)(C)OC(=O)N1CC(N)C1 RBTVSNLYYIMMKS-UHFFFAOYSA-N 0.000 claims description 2
- 239000012190 activator Substances 0.000 abstract description 9
- 238000010276 construction Methods 0.000 abstract description 4
- 230000008439 repair process Effects 0.000 abstract description 4
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 20
- 239000003795 chemical substances by application Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- 239000002994 raw material Substances 0.000 description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000004327 boric acid Substances 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 125000005619 boric acid group Chemical group 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
- C04B40/0042—Powdery mixtures
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/10—Accelerators; Activators
- C04B2103/12—Set accelerators
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a cement quick-hardening additive, which mainly solves the technical problem that the existing quick-hardening cement material has insufficient universality; the quick-hardening cement comprises 60-80 wt% of quick-hardening cement, 10-30 wt% of early strength component, 5-8 wt% of excitant and 2-5 wt% of retarding component; the activator in the components is prepared by high-speed shearing of sodium silicate, calcium hydroxide and a small amount of distilled water in a proper proportion at 2000-4500 r/min, and the preparation process is simple, convenient and fast. The cement rapid hardening additive is 10-30% of the cement cementing material, so that the cement base material can be rapidly hardened within a few hours, the compression strength can reach 20MPa within 5 hours, and the later strength is good; is more suitable for emergency repair and emergency rescue, construction in winter and rapid demoulding of cement base materials.
Description
Technical Field
The invention relates to the field of cement quick-hardening additives, in particular to a formula and application of a cement quick-hardening additive, belonging to the technology of quick-hardening and early-strength materials for building materials, namely cement concrete.
Background
Internationally, the history of fast hardening concrete research dates back to 70 years in the last century, and the traditional fast hardening concrete is prepared by adopting fast hardening cement, but the fast hardening concrete, mortar and the like are prepared by applying ordinary portland cement in a form of an additive besides the fast hardening agent in Japan. And for the research and application of the rapid hardening agent, Japan is also advanced. The action principles of the rapid hardening agent and the rapid hardening cement adopted in Japan are the same, and the effective component (C) in the rapid hardening clinker is utilized3A、C12A7、C4A3S, etc.) to rapidly dissolve Al within a few minutes2O3、Ca(OH)2The concentration reaches a maximum. Due to Al in the liquid phase2O3High concentration and Ca (OH)2The concentration is also high, so C is quickly formed in the liquid phase2AH8Ettringite, etc., these hydration products being built up with each otherAnd then a net structure is formed, so that the coagulation is fast and the strength is generated. In contrast, the Japanese rapid hardening agent adopts high-purity raw materials, strict proportion and a special firing process to fire a single clinker phase, so that the mixing amount of the rapid hardening agent is reduced.
In the prior art, the invention patent of patent No. 201210150392.0 discloses a method for preparing an ultra-early-strength concrete material, which adopts sulphoaluminate cement as a cementing material, and leads the compressive strength of the prepared concrete to reach 30MPa within 6h by doping early-strength components, but the consumption of the sulphoaluminate cement is too large. In the preparation method of the super early strength concrete disclosed in patent CN103467040A, although ordinary portland cement is used as a basic cementing material, a large amount of Na + is introduced due to the use of sodium hydroxide as an activator, and the drying shrinkage is large, so that the alkali-aggregate reaction is easily caused, and the potential safety hazard exists. Patent CN104710128A discloses a super early strength agent for portland cement concrete, which is prepared by compounding an early strength agent, an accelerator and a water reducing agent, is chlorine-free and alkali-free, and has a 16h compressive strength of the cement concrete reaching more than 20MPa in a low-temperature environment in winter, but can not meet the requirement of rapid traffic in a repairing process. The invention patent of patent No. 201711474825.7 discloses a CSH gel type early strength agent and a preparation method thereof by purification and redispersion, wherein the early strength agent is prepared by mixing, stirring and filter-pressing solutions of sodium silicate, calcium nitrate and calcium hydroxide in a certain order to prepare a liquid gel type early strength agent. The preparation method is complex and the production cost is high.
The cement quick-hardening additive related by the invention has an action mechanism that the quick-hardening cement in the cement quick-hardening additive is stimulated to hydrate by adopting the excitant, and then the hydration reaction of the common Portland cement is stimulated by the hydration reaction of the quick-hardening cement, so that the concrete can rapidly generate higher strength and the later strength is good. The product has stable performance and low cost, and can be suitable for the fields of emergency repair and emergency rescue, winter construction, rapid demoulding of cement base materials and the like.
Disclosure of Invention
The invention aims to provide a quick-hardening additive applied to a common portland cement gelling system, aiming at overcoming the defects of the prior art for preparing quick-hardening concrete, which can quickly harden concrete and has the characteristics of small demand for quick-hardening cement, stable performance, low cost and the like. The method is suitable for the fields of emergency repair, winter construction, rapid demoulding of cement base materials and the like, and is realized by the following technology.
A cement rapid hardening additive comprises 60-80 wt% of rapid hardening cement, 10-30 wt% of early strength component, 5-8 wt% of excitant and 2-5 wt% of retarding component;
wherein the excitant is prepared from sodium silicate and calcium hydroxide through high-speed shearing, and the preparation method comprises the following steps:
s1, weighing sodium silicate and calcium hydroxide powder according to the mass ratio of calcium to silicon of 0.8-1.5: 1, and shearing and mixing at a high speed of 2000-4500 r/min for 3-5 min to obtain a mixture;
s2, adding distilled water according to the mass ratio of the distilled water to the mixture prepared in the step S1 of 0.01-0.05: 1, and shearing at a high speed of 2000-4500 r/min for 20-30 min;
s3, crushing and drying to obtain the finished product of the excitant.
In the cement quick-hardening additive, in order to promote the quick reaction of sodium silicate and calcium hydroxide, a small amount of distilled water is added into the mixture of the sodium silicate and the calcium hydroxide, and the sodium silicate and the calcium hydroxide are subjected to quick reaction in a high-speed shearing mode. The rate at high shear cannot be too low, otherwise the effect is not good.
Preferably, the cement quick-hardening additive comprises 74 wt% of quick-hardening cement, 18 wt% of early strength component, 6 wt% of excitant and 2 wt% of retarding component.
More preferably, in the step S1 of preparing the activator, the sodium silicate and the calcium hydroxide are weighed according to the mass ratio of calcium to silicon of 1.2: 1.
More preferably, in the step S2 of preparing the excitant, the mass ratio of the distilled water to the mixed material is 0.035: 1.
More preferably, in the step S2 of preparing the excitant, the rotation speed of high-speed shearing is 3800 r/min.
More preferably, the quick hardening cement is at least one of quick hardening portland cement, quick hardening sulphoaluminate cement, quick hardening fluoroaluminate cement and quick hardening ferro-aluminate cement.
More preferably, the early strength component consists of soluble sulfate and gypsum, and the effective mass ratio of the soluble sulfate to the gypsum is 0.5-1.5: 1.
Further preferably, the easily soluble sulfate is at least one of lithium sulfate, sodium sulfate, potassium sulfate, aluminum sulfate and aluminum potassium sulfate; the gypsum comprises at least one of desulfurized gypsum, anhydrite, dihydrate gypsum and hemihydrate gypsum.
The invention also provides an application method of the cement quick-hardening additive, wherein the mixing amount of the cement quick-hardening additive in a cement cementing material for preparing concrete is 10-30%.
Compared with the prior art, the invention has the advantages that:
1. the calcium silicate crystal excitant is prepared by the reaction of sodium silicate and calcium hydroxide, the preparation process is simple, convenient and quick, and the field preparation is not needed;
2. the rapid hardening additive provided by the invention is added into common concrete, so that the compressive strength of the concrete can quickly reach 20MPa within 5h, and the later strength is good; the quick-hardening cement has the characteristics of small demand on the quick-hardening cement, low cost and the like, and is more suitable for emergency repair and emergency rescue, winter construction, quick demoulding of cement base materials and the like.
Detailed Description
The technical solutions of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the cement quick-hardening additives prepared in the following examples and comparative examples, quick-hardening sulphoaluminate cement is selected as the quick-hardening cement; the early strength component is sodium sulfate and anhydrite with the mass ratio of 1:1, and the retarder is boric acid.
The excitant is prepared from sodium silicate and calcium hydroxide by high-speed shearing, and the preparation method comprises the following steps:
s1, weighing sodium silicate and calcium hydroxide powder according to a certain mass ratio of calcium to silicon, and uniformly shearing at a high speed to obtain a mixture;
s2, adding distilled water according to a certain mass ratio of the distilled water to the mixture, and shearing at a high speed for 30 min;
s3, crushing and drying to obtain the finished product of the excitant.
Concrete prepared according to the following examples and comparative examples the following application examples used the raw materials and specifications as shown in table 1 below.
TABLE 1 raw materials and specifications
| Raw material | Specification of |
| Cement | Special reference cement for testing concrete admixture |
| Stone | 5-31.5mm continuous graded broken stone and limestone with strength greater than 120MPa |
| River sand | Medium sand with fineness modulus of 2.4 and mud content less than 0.1% |
| Water reducing agent | The polycarboxylic acid high-performance water reducing agent has the water reducing rate of more than or equal to 30 percent and the solid content of 15 percent |
Examples 1 to 3 and comparative examples 1 to 2
The mass ratios of the quick hardening sulfoaluminate cement, the sodium sulfate, the anhydrite, the boric acid and the activator in the cement quick hardening additives prepared in the examples 1 to 3 and the comparative examples 1 to 2 are shown in the following table 2.
Table 2 raw material tables of the cement quick-hardening additives prepared in examples 1 to 3 and comparative examples 1 to 2, unit: wt.%
In the cement quick-hardening additive prepared in the embodiments 1 to 3 and the comparative examples 1 to 2, when the activator is used for preparation, sodium silicate and calcium hydroxide are weighed according to the mass ratio of calcium to silicon of 1.2:1 in the step S1; in the step S2, the mass ratio of the distilled water to the mixture is 0.035:1, and the high-speed shearing speed is 3800 r/min.
Examples 4 to 9 and comparative examples 3 to 8
The mass ratios of the rapid hardening sulfoaluminate cement, the sodium sulfate, the anhydrite, the boric acid and the excitant in the cement rapid hardening additives prepared in the embodiments 4 to 9 and the comparative examples 3 to 8 are the same as those in the embodiment 3. The exciting agent used in the preparation of the composition is shown in Table 3 below, wherein the mass ratio of calcium to silicon in sodium silicate and calcium hydroxide in step S1, the mass ratio of distilled water to the mixed material in step S2, and the rotation speed of high-speed shearing are shown in the following Table 3.
TABLE 3 raw material tables of quick cement hardening additives prepared in examples 4 to 9 and comparative examples 3 to 8
Application example
A blank group is set, the raw materials comprise 460kg of cement, 688kg of sand, 1108kg of stones, 147kg of water and 5.75kg of water reducing agent, and concrete samples of the blank group are prepared. The cement quick-hardening additives prepared in examples 1 to 9 and comparative examples 1 to 8 are mixed into concrete raw materials to prepare corresponding quick-hardening concrete samples in proportion to replace part of raw material cement in blank groups.
The compressive strength of the concrete samples prepared by each group, the cement quick-hardening additive mixing proportion of the concrete samples of each group and the compressive strength detection result are shown in the following table 4.
TABLE 4 concrete sample compressive strength tables of examples 1 to 9 and comparative examples 1 to 8
Note: the cement quick-hardening additives of each group of the examples and the comparative examples equally replace the cement of the blank group according to the mixing percentage.
It can be seen from comparison of examples 1-3 and comparative examples 1 and 2 that when the cement quick-hardening additive prepared in examples 1-3 is added into concrete, the quick-hardening early-strength effect is obviously better than that of comparative examples 1 and 2, wherein the effect of example 3 is the best, and the compressive strength reached within 5 hours is the highest. The cement rapid hardening additives of examples 1 to 3 are described as having a good mixing ratio of rapid hardening cement, early strength component, retarder and activator, and the best additive of example 3.
As can be seen from comparison of examples 3, 4 and 5 with comparative examples 3 and 4, the cement quick-hardening additives prepared in examples 3, 4 and 5, when added into concrete, have a significantly better quick-hardening early-strengthening effect than comparative examples 3 and 4, wherein the effect of example 3 is the best and the compressive strength achieved in 5h is the highest. In the cement rapid hardening additives of examples 3, 4 and 5, the quality of calcium and silicon selected in step S1 is better when the activator is prepared, and the best of example 3.
As can be seen from the comparison of examples 3, 6 and 7 with comparative examples 5 and 6, the cement quick-hardening additives prepared in examples 3, 6 and 7, when added into concrete, have a significantly better quick-hardening early-strengthening effect than comparative examples 5 and 6, wherein the effect of example 3 is the best and the compressive strength achieved in 5h is the highest. The cement quick-hardening additives of examples 3, 6 and 7 will be described, wherein the quality of the distilled water and the mixed material selected in step S2 in the preparation of the activator is relatively good, and the best additive of example 3 is obtained.
As can be seen from comparison of examples 3, 8 and 9 with comparative examples 7 and 8, the cement quick-hardening additives prepared in examples 3, 8 and 9, when added to concrete, have a significantly better quick-hardening early-strengthening effect than comparative examples 7 and 8, wherein the effect of example 3 is the best and the maximum compressive strength is achieved within 5 hours. The cement quick-hardening additives of examples 3, 8 and 9 will be described, wherein the quality of the distilled water and the mixed material selected in step S2 in the preparation of the activator is relatively good, and the best additive of example 3 is obtained.
The concrete prepared in example 3I, example 3 II, example 3 III, example 3 IV, example 3V, example 3 VI and example 3 VII were compared to obtain the best 5h and 28d compressive strengths, and the cement early strength additive prepared in example 3 was added in an amount of 20% in place of the cement blank.
Claims (8)
1. The cement rapid hardening additive is characterized by comprising 74 wt% of rapid hardening cement, 18 wt% of early strength component, 6 wt% of excitant and 2 wt% of retarding component;
wherein, the preparation method of the excitant comprises the following steps:
s1, weighing sodium silicate and calcium hydroxide powder according to the mass ratio of calcium to silicon of 0.8-1.5: 1, and shearing and mixing at a high speed of 2000-4500 r/min for 3-5 min to obtain a mixture;
s2, adding distilled water according to the mass ratio of the distilled water to the mixture prepared in the step S1 of 0.01-0.05: 1, and shearing at a high speed of 2000-4500 r/min for 20-30 min;
s3, crushing and drying to obtain the finished product of the excitant.
2. The cement rapid-hardening additive according to claim 1, wherein in step S1, the sodium silicate and the calcium hydroxide are weighed according to a mass ratio of calcium to silicon of 1.2: 1.
3. The cement rapid hardening additive according to claim 1, wherein in step S2, the mass ratio of the distilled water to the mixed material is 0.035: 1.
4. The cement rapid hardening additive according to claim 1, wherein in step S2, the high speed shearing speed is 3800 r/min.
5. The cement rapid hardening additive according to claim 1, wherein the rapid hardening cement is at least one of rapid hardening portland cement, rapid hardening sulphoaluminate cement, rapid hardening fluoroaluminate cement, and rapid hardening ferro-aluminate cement.
6. The cement quick-hardening additive as claimed in claim 1, wherein the early strength component is composed of soluble sulfate and gypsum, and the effective mass ratio of the soluble sulfate to the gypsum is 0.5-1.5: 1.
7. The cement rapid hardening additive as claimed in claim 6, wherein the easily soluble sulfate is at least one of lithium sulfate, sodium sulfate, potassium sulfate, aluminum sulfate, and aluminum potassium sulfate; the gypsum comprises at least one of desulfurized gypsum, anhydrite, dihydrate gypsum and hemihydrate gypsum.
8. The application of the cement rapid hardening additive as claimed in claim 1, characterized in that the mixing amount of the cement rapid hardening additive in the cement cementing material for preparing concrete is 10-30%.
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| CN105339322A (en) * | 2013-06-20 | 2016-02-17 | 电化株式会社 | Cement quick hardening material, method for producing same, and cement composition |
| CN105777035A (en) * | 2016-02-29 | 2016-07-20 | 同济大学 | Concrete crack grouting repairing material prepared from calcium silicate hydrate crystal seed powder and use method of material |
| CN108178547A (en) * | 2017-12-29 | 2018-06-19 | 上海建工集团股份有限公司 | A kind of CSH gel-types early strength agent and its purification redisperse preparation method |
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2018
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| CN1654411A (en) * | 2005-01-21 | 2005-08-17 | 赵若鹏 | Fast repairing concrete material and its use method |
| CN101555108A (en) * | 2009-05-25 | 2009-10-14 | 贵州省建筑材料科学研究设计院 | Ultra-early-strength high-strength composite additive and preparation method thereof |
| CN105339322A (en) * | 2013-06-20 | 2016-02-17 | 电化株式会社 | Cement quick hardening material, method for producing same, and cement composition |
| JP2015127286A (en) * | 2013-12-28 | 2015-07-09 | 太平洋マテリアル株式会社 | Method for manufacturing quick hardening expansive cement mixture |
| CN104402009A (en) * | 2014-10-29 | 2015-03-11 | 上海建工集团股份有限公司 | Calcium silicate hydrate gel solution early strength agent and preparation method thereof |
| CN105777035A (en) * | 2016-02-29 | 2016-07-20 | 同济大学 | Concrete crack grouting repairing material prepared from calcium silicate hydrate crystal seed powder and use method of material |
| CN108178547A (en) * | 2017-12-29 | 2018-06-19 | 上海建工集团股份有限公司 | A kind of CSH gel-types early strength agent and its purification redisperse preparation method |
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