CN108467215A - A kind of nanometer C-S-H crystal seeds early strength agent and preparation method for building concrete - Google Patents
A kind of nanometer C-S-H crystal seeds early strength agent and preparation method for building concrete Download PDFInfo
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- CN108467215A CN108467215A CN201810192638.8A CN201810192638A CN108467215A CN 108467215 A CN108467215 A CN 108467215A CN 201810192638 A CN201810192638 A CN 201810192638A CN 108467215 A CN108467215 A CN 108467215A
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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
- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
- C08F283/065—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals on to unsaturated polyethers, polyoxymethylenes or polyacetals
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/10—Accelerators; Activators
- C04B2103/12—Set accelerators
Abstract
The present invention relates to concrete additive fields, disclose a kind of nanometer C S H crystal seeds early strength agent and preparation method for building concrete.Including following preparation process：（1）Ammonium persulfate, Victoria C and lauryl mercaptan is added in acrylic monomer, silane coupling agent, modified polyoxyethylene ether and is configured to polymer solution；（2）Sodium metasilicate is configured to the solution A that mass concentration is 45 ~ 50%, calcium nitrate is configured to the solution B that mass concentration is 30 ~ 40%；（3）Polymer solution is added in solution A and solution B, the uniform and stable nanometer C S H crystal seed early strength agent for building concrete is made in reaction.For early strength agent produced by the present invention compared with common early strength agent, grain diameter is small, and is evenly distributed, it can accelerate hydrated reaction of cement process, significantly improve early strength, no electrochemical corrosion phenomenon, production efficiency is greatly improved, on concrete component later strength without influence, production application can be promoted.
Description
Technical field
The present invention relates to concrete additive fields, and it is early to disclose a kind of nanometer C-S-H crystal seeds for building concrete
Strong agent and preparation method.
Background technology
Concrete early strength agent is one of principal item of concrete admixture.So far, the early-strength successively developed both at home and abroad
Additive includes mainly：The inorganic salts early strength agent such as villaumite, sulfate, nitrite, silicate；Triethanolamine, calcium formate and
Organic species early strength agent such as urea；A variety of strong class additives of compound morning, such as early strength water-reducing agent, early strength antifreezing agent and early strong pump
Send agent etc..
Concrete in the construction process, the condensation caused by the aquation harden to expected intensity need one section it is longer when
Between, early strength of concrete can be significantly improved by adding early strength agent, so as to shorten curing time.Early strength agent is called agent of promoting the strong, it
Concrete coagulation, setting rate can be adjusted.In winter construction or has to generally require in the concrete works of early strong demand and add
Add early strength agent, to shorten demoulding and curing time, accelerate construction progress, to effectively improve construction quality, saves concrete and apply
Work cost.Northeast, North China, the winter of the Northwest are longer, and temperature is sometimes in concrete construction.10 DEG C are down to hereinafter, mixing
Add early strength agent or early strength water-reducing agent it is possible to prevente effectively from freeze injury.
Common single type early strength agent generally can not meet concrete performance requirement, and by a plurality of types of early strength agent phases
Mutual compound or early strength agent is applied in combination with water-reducing agent can preferably improve concrete comprehensive performance, make it that can improve concrete
Early strength, and may advantageously facilitate late-enhancement, moreover it is possible to there is certain water-reducing effect, while can be to avoid inside concrete steel
The problem of muscle corrosion etc..Currently, NEW TYPE OF COMPOSITE class early strength agent becomes the Main way of many experts research.
Chinese invention patent application number 201110366521.5 disclose a kind of early stage significantly increasing concrete and
Later strength shortens the construction period, while the concrete nanometer again with good diminishing, guarantor's modeling, resistance rust and stability subtracts
Water super instant coagulant, each component and mass percent are as follows：Accelerating component 46% ~ 52%；Diminishing component 26% ~ 32%；Resistance rust component 6% ~
15%；Slow setting component 4% ~ 5%；Adjust component 6% ~ 8%；Accelerating component is magnesium sulfate, sodium sulphate, sodium nitrite, triethanolamine, sulphur
Three kinds in sodium thiosulfate, triisopropanolamine, calcium formate or four kinds；Diminishing component is naphthalene sulfonic acids series high-efficiency water-reducing agent, carboxylic serials
One kind in water-reducing agent；Resistance rust component is one kind in calcium nitrite, calcium nitrate, potassium chromate, stannous chloride；The slow setting component
It is one kind in sodium gluconate, citric acid；It is nano heavy calcium carbonate to adjust component.
It is early strong that Chinese invention patent application number 201610836056.X discloses a kind of Al-Zn-Si nano-complexes rapid hardening
Agent and preparation method thereof.Al-Zn-Si nano-complexes fast coagulating early strength agent of the present invention is in dispersing agent C and thickener E conditions
Under, it is made using aluminum soluble salt A, soluble zinc salt B and soluble silicate the D double hydrolysis occurred.Described in the invention
Al-Zn-Si nano-complex fast coagulating early strength agent rapid hardening significant effects, while also making the pore structure in cement more reasonable, knot
Structure is more closely knit, makes its early strength（12h~1d）It is obviously improved, and later strength (28d) also has small elevation；The rapid hardening
Early strength agent is acted on without villaumite, to the reinforcing bar non-corroding in concrete, does not influence the durability of concrete；The fast coagulating early strength agent is
Extremely stable suspension system is easy to evenly dispersed in concrete preparation process convenient for addition.
According to above-mentioned, template turnover can be improved in the inorganic early strength agent significant effect such as traditional calcium salt, villaumite in existing scheme
Rate, but the impurity that largely may participate in or promote electrochemical reaction is introduced to concrete, to crucial reinforcing rib（Such as reinforcing bar）
Larger electrochemical corrosion is caused, the quality of concrete component is seriously affected, the present invention proposes a kind of for building coagulation
The nanometer C-S-H crystal seeds early strength agent and preparation method of soil, can effectively solve above-mentioned technical problem.
Invention content
The wider concrete early strength agent of application promotes unconspicuous defect there are early strength at present, and traditional electrodeless morning
Strong agent is also easy to produce electrochemical corrosion, seriously affects the quality of concrete component.
To solve the above problems, the present invention uses following technical scheme：
A kind of preparation method of nanometer C-S-H crystal seed early strength agent for building concrete, the detailed process of preparation are：
（1）Ammonium persulfate, Victoria C and lauryl mercaptan is added in acrylic monomer, silane coupling agent, modified polyoxyethylene ether
In the redox system of composition, aggregated reaction is made molecular weight and is 4000 ~ 20000 high molecular polymer, and is configured to
Polymer solution；
（2）Sodium metasilicate is configured to the solution A that mass concentration is 45 ~ 50%, it is 30 ~ 40% that calcium nitrate, which is configured to mass concentration,
Solution B；
（3）By step（1）Polymer solution obtained is placed in reaction kettle bottom, is to prepare nanometer C-S-H crystal seeds with polymer
Dispersant and size controlling agent, under constant temperature at the uniform velocity continued mechanical stirring condition simultaneously a dropping step（2）Solution A obtained and molten
Liquid B, the drop rate by adjusting two kinds of solution control the molar ratio of calcium and silicon, continue stirring a period of time after being added dropwise to complete,
Make that the reaction was complete, filtration drying, you can the uniform and stable nanometer C-S-H crystal seed early strength agent for building concrete is made.
Preferably, step（1）In the reaction system, by weight, wherein：30 ~ 42 parts of acrylic monomer, silane
3 ~ 5 parts of coupling agent, modified 11 ~ 15 parts of polyoxyethylene ether, 2 ~ 4 parts of ammonium persulfate, 3 ~ 5 parts of Victoria C, lauryl mercaptan 31 ~ 49
Part.
Preferably, step（1）The acrylic monomer is acrylic acid, methacrylic acid, methyl acrylate, acrylic acid second
At least one of ester, methyl methacrylate, butyl acrylate.
Preferably, step（1）The silane coupling agent be vinyltrimethoxysilane, vinyltriethoxysilane,
At least one of gamma-aminopropyl-triethoxy-silane, vinyl three ('beta '-methoxy ethyoxyl) silane.
Preferably, step（1）The modified polyoxyethylene ether is allyl alcohol polyethenoxy ether（APEG）, prenol polyoxy
Vinethene（TPEG）, poly glycol monomethyl ether（MPEG）At least one of.
Preferably, step（1）The mass concentration of the polymer solution is 12 ~ 20%.
Preferably, step（3）The reaction temperature is 80 ~ 95 DEG C, and mixing speed is 120 ~ 150r/min.
Preferably, step（3）The molar ratio of the calcium and silicon is 3:2~2:1.
Preferably, step（3）It is described be added dropwise to complete after mixing time be 30 ~ 40min.
A kind of nanometer C-S-H crystal seed early strength agent for building concrete being prepared by the above method, passes through nitric acid
Calcium generates calcium metasilicate precipitation, the nothing of silane coupling agent part and sediment in high molecular polymer after being mixed with sodium metasilicate
Machine interface forms bonding, is adsorbed in precipitation particle surface strongly, and the contact between dispersion precipitation particle, prevention particle is realized
Limitation precipitation particle continues the purpose grown up；Nucleation of the obtained nanometer C-S-H crystal seeds early strength agent as hydrolysis product of cement
Point can substantially reduce potential barrier, accelerate hydrated reaction of cement process, significantly improve early strength, greatly improve production efficiency and coagulation
Native component later strength also free of losses.
Using C30 match ratio mixing concrete, early strength agent dosage is the 0.5% of concrete quality, prepared by the test present invention
Grain diameter, early strength increase rate and the electrochemical corrosion rate of early strength agent, and it is early with nitrite early strength agent and triethanolamine
Strong agent compares, and method of the invention has a clear superiority, as shown in table 1.
Table 1：
The present invention provides a kind of nanometer C-S-H crystal seeds early strength agent and preparation method for building concrete, with the prior art
It compares, the feature and excellent effect protruded is：
1, the nanometer C-S-H crystal seeds proposed using calcium nitrate with the preparation of sodium metasilicate hybrid reaction for building concrete are early strong
The method of agent.
2, it is contacted with the calcium metasilicate precipitation that reaction generates by the silane coupling agent agent in high polymer, forms bonding absorption
Contact between surface, dispersion precipitation particle, prevention particle, effectively limits the problem of precipitable particle continues to grow up.
3, nanometer C-S-H crystal seed early strength agent obtained can be used as the nucleating point of hydrolysis product of cement, substantially reduces potential barrier, adds
Fast hydrated reaction of cement process, significantly improves early strength, and no electrochemical corrosion phenomenon greatly improves production efficiency, to coagulation
Native component later strength is without influence.
Specific implementation mode
In the following, the present invention will be further described in detail by way of specific embodiments, but this should not be interpreted as to the present invention
Range be only limitted to example below.Without departing from the idea of the above method of the present invention, according to ordinary skill
The various replacements or change that knowledge and customary means are made, should be included in the scope of the present invention.
Embodiment 1
（1）Ammonium persulfate, Victoria C and lauryl mercaptan is added in acrylic monomer, silane coupling agent, modified polyoxyethylene ether
In the redox system of composition, aggregated reaction is made molecular weight and is 10000 high molecular polymer, and is configured to polymer
Solution；Acrylic monomer is acrylic acid, methacrylic acid；Silane coupling agent is vinyltrimethoxysilane；Modified polyoxy
Vinethene is allyl alcohol polyethenoxy ether（APEG）；The mass concentration of polymer solution is 16%；
In reaction system, by weight, wherein：36 parts of acrylic monomer, 4 parts of silane coupling agent, modified polyoxyethylene ether
13 parts, 3 parts of ammonium persulfate, 4 parts of Victoria C, 40 parts of lauryl mercaptan；
（2）Sodium metasilicate is configured to the solution A that mass concentration is 48%, calcium nitrate is configured to the solution that mass concentration is 35%
B；
（3）By step（1）Polymer solution obtained is placed in reaction kettle bottom, constant temperature at the uniform velocity continued mechanical stirring condition similarly hereinafter
When a dropping step（2）Solution A and solution B obtained continue stirring a period of time, make that the reaction was complete, cross and be filtered dry after being added dropwise to complete
It is dry, it can be prepared by the uniform and stable nanometer C-S-H crystal seed early strength agent for building concrete；Reaction temperature is 88 DEG C, stirring
Speed is 135r/min；The molar ratio of calcium and silicon is 3:2；Mixing time after being added dropwise to complete is 35min.
Early strength agent made from embodiment 1 is used for concrete mixing, and early strength agent dosage is the 0.5% of concrete quality, particle
Grain size, early strength increase rate and electrochemical corrosion rate are as shown in table 2.
Embodiment 2
（1）Ammonium persulfate, Victoria C and lauryl mercaptan is added in acrylic monomer, silane coupling agent, modified polyoxyethylene ether
In the redox system of composition, aggregated reaction is made molecular weight and is 4000 high molecular polymer, and is configured to polymer
Solution；Acrylic monomer is methacrylic acid；Silane coupling agent is vinyltriethoxysilane；Being modified polyoxyethylene ether is
Isoamyl alcohol polyoxyethylene ether（TPEG）；The mass concentration of polymer solution is 12%；
In reaction system, by weight, wherein：30 parts of acrylic monomer, 3 parts of silane coupling agent, modified polyoxyethylene ether
11 parts, 2 parts of ammonium persulfate, 3 parts of Victoria C, 49 parts of lauryl mercaptan；
（2）Sodium metasilicate is configured to the solution A that mass concentration is 45%, calcium nitrate is configured to the solution that mass concentration is 30%
B；
（3）By step（1）Polymer solution obtained is placed in reaction kettle bottom, constant temperature at the uniform velocity continued mechanical stirring condition similarly hereinafter
When a dropping step（2）Solution A and solution B obtained continue stirring a period of time, make that the reaction was complete, cross and be filtered dry after being added dropwise to complete
It is dry, it can be prepared by the uniform and stable nanometer C-S-H crystal seed early strength agent for building concrete；Reaction temperature is 80 DEG C, stirring
Speed is 150r/min；The molar ratio of calcium and silicon is 3:2；Mixing time after being added dropwise to complete is 30min.
Early strength agent made from embodiment 2 is used for concrete mixing, concrete system and early strength agent addition with embodiment 1,
Its grain diameter, early strength increase rate and electrochemical corrosion rate are as shown in table 2.
Embodiment 3
（1）Ammonium persulfate, Victoria C and lauryl mercaptan is added in acrylic monomer, silane coupling agent, modified polyoxyethylene ether
In the redox system of composition, aggregated reaction is made molecular weight and is 20000 high molecular polymer, and is configured to polymer
Solution；Acrylic monomer is methyl acrylate；Silane coupling agent is gamma-aminopropyl-triethoxy-silane；Modified polyoxyethylene
Ether is poly glycol monomethyl ether（MPEG）；The mass concentration of polymer solution is 20%；
In reaction system, by weight, wherein：42 parts of acrylic monomer, 5 parts of silane coupling agent, modified polyoxyethylene ether
15 parts, 4 parts of ammonium persulfate, 5 parts of Victoria C, 31 parts of lauryl mercaptan；
（2）Sodium metasilicate is configured to the solution A that mass concentration is 50%, calcium nitrate is configured to the solution that mass concentration is 40%
B；
（3）By step（1）Polymer solution obtained is placed in reaction kettle bottom, constant temperature at the uniform velocity continued mechanical stirring condition similarly hereinafter
When a dropping step（2）Solution A and solution B obtained continue stirring a period of time, make that the reaction was complete, cross and be filtered dry after being added dropwise to complete
It is dry, you can the uniform and stable nanometer C-S-H crystal seed early strength agent for building concrete is made；Reaction temperature is 95 DEG C, stirring
Speed is 120r/min；The molar ratio of calcium and silicon is 2:1；Mixing time after being added dropwise to complete is 40min.
Early strength agent made from embodiment 3 is used for concrete mixing, concrete system and early strength agent addition with embodiment 1,
Its grain diameter, early strength increase rate and electrochemical corrosion rate are as shown in table 2.
Embodiment 4
（1）Ammonium persulfate, Victoria C and lauryl mercaptan is added in acrylic monomer, silane coupling agent, modified polyoxyethylene ether
In the redox system of composition, aggregated reaction is made molecular weight and is 6000 high molecular polymer, and is configured to polymer
Solution；Acrylic monomer is ethyl acrylate；Silane coupling agent is vinyl three ('beta '-methoxy ethyoxyl) silane；It is modified poly-
Ethylene oxide ether is allyl alcohol polyethenoxy ether（APEG）；The mass concentration of polymer solution is 14%；
In reaction system, by weight, wherein：33 parts of acrylic monomer, 3 parts of silane coupling agent, modified polyoxyethylene ether
12 parts, 2 parts of ammonium persulfate, 4 parts of Victoria C, 46 parts of lauryl mercaptan；
（2）Sodium metasilicate is configured to the solution A that mass concentration is 46%, calcium nitrate is configured to the solution that mass concentration is 32%
B；
（3）By step（1）Polymer solution obtained is placed in reaction kettle bottom, constant temperature at the uniform velocity continued mechanical stirring condition similarly hereinafter
When a dropping step（2）Solution A and solution B obtained continue stirring a period of time, make that the reaction was complete, cross and be filtered dry after being added dropwise to complete
It is dry, you can the uniform and stable nanometer C-S-H crystal seed early strength agent for building concrete is made；Reaction temperature is 82 DEG C, stirring
Speed is 130r/min；The molar ratio of calcium and silicon is 2:1；Mixing time after being added dropwise to complete is 32min.
Early strength agent made from embodiment 4 is used for concrete mixing, and grain diameter, early strength increase rate and electrochemistry are rotten
Erosion rate is as shown in table 2.
Embodiment 5
（1）Ammonium persulfate, Victoria C and lauryl mercaptan is added in acrylic monomer, silane coupling agent, modified polyoxyethylene ether
In the redox system of composition, aggregated reaction is made molecular weight and is 16000 high molecular polymer, and is configured to polymer
Solution；Acrylic monomer is methyl methacrylate；Silane coupling agent is vinyltrimethoxysilane；Modified polyoxyethylene
Ether is isoamyl alcohol polyoxyethylene ether（TPEG）；The mass concentration of polymer solution is 18%；
In reaction system, by weight, wherein：40 parts of acrylic monomer, 5 parts of silane coupling agent, modified polyoxyethylene ether
13 parts, 3 parts of ammonium persulfate, 5 parts of Victoria C, 34 parts of lauryl mercaptan；
（2）Sodium metasilicate is configured to the solution A that mass concentration is 48%, calcium nitrate is configured to the solution that mass concentration is 38%
B；
（3）By step（1）Polymer solution obtained is placed in reaction kettle bottom, constant temperature at the uniform velocity continued mechanical stirring condition similarly hereinafter
When a dropping step（2）Solution A and solution B obtained continue stirring a period of time, make that the reaction was complete, you can system after being added dropwise to complete
It must be used for the uniform and stable nanometer C-S-H crystal seed early strength agent of building concrete；Reaction temperature is 93 DEG C, and mixing speed is
140r/min；The molar ratio of calcium and silicon is 3:2；Mixing time after being added dropwise to complete is 38min.
Early strength agent made from embodiment 5 is used for concrete mixing, concrete system and early strength agent addition with embodiment 1,
Its grain diameter, early strength increase rate and electrochemical corrosion rate are as shown in table 2.
Embodiment 6
（1）Ammonium persulfate, Victoria C and lauryl mercaptan is added in acrylic monomer, silane coupling agent, modified polyoxyethylene ether
In the redox system of composition, aggregated reaction is made molecular weight and is 10000 high molecular polymer, and is configured to polymer
Solution；Acrylic monomer is butyl acrylate；Silane coupling agent is vinyltriethoxysilane；Being modified polyoxyethylene ether is
Poly glycol monomethyl ether（MPEG）；The mass concentration of polymer solution is 15%；
In reaction system, by weight, wherein：37 parts of acrylic monomer, 4 parts of silane coupling agent, modified polyoxyethylene ether
14 parts, 3 parts of ammonium persulfate, 4 parts of Victoria C, 38 parts of lauryl mercaptan；
（2）Sodium metasilicate is configured to the solution A that mass concentration is 48%, calcium nitrate is configured to the solution that mass concentration is 36%
B；
（3）By step（1）Polymer solution obtained is placed in reaction kettle bottom, constant temperature at the uniform velocity continued mechanical stirring condition similarly hereinafter
When a dropping step（2）Solution A and solution B obtained continue stirring a period of time, make that the reaction was complete, cross and be filtered dry after being added dropwise to complete
It is dry, you can the uniform and stable nanometer C-S-H crystal seed early strength agent for building concrete is made；Reaction temperature is 90 DEG C, stirring
Speed is 135r/min；The molar ratio of calcium and silicon is 2:1；Mixing time after being added dropwise to complete is 36min.
Early strength agent made from embodiment 6 is used for concrete mixing, concrete system and early strength agent addition with embodiment 1,
Its grain diameter, early strength increase rate and electrochemical corrosion rate are as shown in table 2.
Comparative example 1
（1）Sodium metasilicate is configured to the solution A that mass concentration is 48%, calcium nitrate is configured to the solution that mass concentration is 36%
B；
（2）By step（1）Solution A and solution B obtained are placed in reaction kettle, and a period of time is stirred in constant temperature at the uniform velocity continued mechanical,
Make that the reaction was complete, you can the early strength agent for building concrete is made；Reaction temperature is 90 DEG C, mixing speed 135r/min；
The molar ratio of calcium and silicon is 2:1；Mixing time is 36min.
Comparative example 1 is not configured to polymer solution, and early strength agent obtained is used for concrete mixing, and concrete system is strong with morning
For agent addition with embodiment 1, grain diameter, early strength increase rate and electrochemical corrosion rate are as shown in table 2.
The test method of above-mentioned performance indicator is：
A certain amount of early strength agent produced by the present invention is taken, test point is carried out to grain diameter and particle diameter distribution using laser particle analyzer
Analysis, characterizes its particle size properties.
Early strength agent produced by the present invention is mixed in C30 armored concrete, early strength agent addition is concrete quality
0.5%, standard concrete test cube is made, tests concrete crushing strength in 1d, 3d and 7d respectively, it is early strong with being not incorporated into
The concrete strength of agent is compared, and calculates early strength increase rate, characterizes its early epistasis energy.
Early strength agent produced by the present invention is mixed in C30 armored concrete, standard concrete test cube is made, is used
Steel bar corrosion measuring instrument side characterizes resistance to electrochemical corrosion to the corrosion ratio of reinforcing bar.
Table 2：
Claims (10)
1. a kind of preparation method of nanometer C-S-H crystal seed early strength agent for building concrete, which is characterized in that preparation it is specific
Process is：
（1）Ammonium persulfate, Victoria C and lauryl mercaptan is added in acrylic monomer, silane coupling agent, modified polyoxyethylene ether
In the redox system of composition, aggregated reaction is made molecular weight and is 4000 ~ 20000 high molecular polymer, and is configured to
Polymer solution；
（2）Sodium metasilicate is configured to the solution A that mass concentration is 45 ~ 50%, it is 30 ~ 40% that calcium nitrate, which is configured to mass concentration,
Solution B；
（3）By step（1）Polymer solution obtained is placed in reaction kettle bottom, is to prepare nanometer C-S-H crystal seeds with polymer
Dispersant and size controlling agent, under constant temperature at the uniform velocity continued mechanical stirring condition simultaneously a dropping step（2）Solution A obtained and molten
Liquid B, the drop rate by adjusting two kinds of solution control the molar ratio of calcium and silicon, continue stirring a period of time after being added dropwise to complete,
Make that the reaction was complete, filtration drying, you can the uniform and stable nanometer C-S-H crystal seed early strength agent for building concrete is made.
2. the preparation method of a kind of nanometer C-S-H crystal seed early strength agent for building concrete according to claim 1, special
Sign is：Step（1）In the reaction system, by weight, wherein：30 ~ 42 parts of acrylic monomer, silane coupling agent 3 ~
5 parts, modified 11 ~ 15 parts of polyoxyethylene ether, 2 ~ 4 parts of ammonium persulfate, 3 ~ 5 parts of Victoria C, 31 ~ 49 parts of lauryl mercaptan.
3. the preparation method of a kind of nanometer C-S-H crystal seed early strength agent for building concrete according to claim 1, special
Sign is：Step（1）The acrylic monomer is acrylic acid, methacrylic acid, methyl acrylate, ethyl acrylate, methyl
At least one of methyl acrylate, butyl acrylate.
4. the preparation method of a kind of nanometer C-S-H crystal seed early strength agent for building concrete according to claim 1, special
Sign is：Step（1）The silane coupling agent is vinyltrimethoxysilane, vinyltriethoxysilane, γ-aminopropyl
At least one of triethoxysilane, vinyl three ('beta '-methoxy ethyoxyl) silane.
5. the preparation method of a kind of nanometer C-S-H crystal seed early strength agent for building concrete according to claim 1, special
Sign is：Step（1）The modified polyoxyethylene ether is allyl alcohol polyethenoxy ether, isoamyl alcohol polyoxyethylene ether, poly- second two
At least one of alcohol monomethyl ether.
6. the preparation method of a kind of nanometer C-S-H crystal seed early strength agent for building concrete according to claim 1, special
Sign is：Step（1）The mass concentration of the polymer solution is 12 ~ 20%.
7. the preparation method of a kind of nanometer C-S-H crystal seed early strength agent for building concrete according to claim 1, special
Sign is：Step（3）The reaction temperature is 80 ~ 95 DEG C, and mixing speed is 120 ~ 150r/min.
8. the preparation method of a kind of nanometer C-S-H crystal seed early strength agent for building concrete according to claim 1, special
Sign is：Step（3）The molar ratio of the calcium and silicon is 3:2~2:1.
9. the preparation method of a kind of nanometer C-S-H crystal seed early strength agent for building concrete according to claim 1, special
Sign is：Step（3）It is described be added dropwise to complete after mixing time be 30 ~ 40min.
10. a kind of nanometer C-S-H crystal seeds for building concrete that any one of claim 1 ~ 9 the method is prepared are early
Strong agent.
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| CN110510960A (en) * | 2019-09-29 | 2019-11-29 | 云南建投绿色高性能混凝土股份有限公司 | A kind of novel nucleus nanometer enhancing pervious concrete and its prepare forming method |
| CN110981269A (en) * | 2019-12-31 | 2020-04-10 | 上海三瑞高分子材料股份有限公司 | Cement early strength agent composition and preparation method thereof |
| CN111499246A (en) * | 2019-12-12 | 2020-08-07 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Concrete early strength composite admixture and preparation method thereof |
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| CN111499246A (en) * | 2019-12-12 | 2020-08-07 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Concrete early strength composite admixture and preparation method thereof |
| CN110981269A (en) * | 2019-12-31 | 2020-04-10 | 上海三瑞高分子材料股份有限公司 | Cement early strength agent composition and preparation method thereof |
| CN111847977A (en) * | 2020-07-06 | 2020-10-30 | 江苏奥莱特新材料股份有限公司 | Nano PCE/CSH crystal nucleus early strength agent and preparation method thereof |
| CN112028541A (en) * | 2020-09-09 | 2020-12-04 | 江西省建筑材料工业科学研究设计院 | Concrete nano reinforcing modifier and preparation method thereof |
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| CN114014991A (en) * | 2021-10-29 | 2022-02-08 | 四川华西绿舍建材有限公司 | Calcium silicate hydrate crystal nucleus early-strength polycarboxylate superplasticizer and preparation method thereof |
| CN114920490A (en) * | 2022-05-28 | 2022-08-19 | 天津如米基业新材料有限公司 | Preparation method and application of super-strong particle crystal glue for concrete |
| CN116041614A (en) * | 2022-12-30 | 2023-05-02 | 东南大学 | Inorganic-organic framework material for concrete internal curing and preparation method thereof |
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