CN112028541A - Concrete nano reinforcing modifier and preparation method thereof - Google Patents
Concrete nano reinforcing modifier and preparation method thereof Download PDFInfo
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- CN112028541A CN112028541A CN202010938406.XA CN202010938406A CN112028541A CN 112028541 A CN112028541 A CN 112028541A CN 202010938406 A CN202010938406 A CN 202010938406A CN 112028541 A CN112028541 A CN 112028541A
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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
Abstract
The invention provides a concrete nano reinforcing modifier, which comprises 2-23 wt% of workability regulator, 0.06-5 wt% of surfactant, 2-21 wt% of nano crystal nucleus early strength agent, 3-25 wt% of composite activator, 0.2-5 wt% of emulsifier, 0.2-4 wt% of wetting agent, 0.2-6 wt% of auxiliary agent and the balance of water. The concrete nano reinforcing modifier can replace a gel reducing agent to be used in concrete to effectively improve the workability of the concrete and greatly improve the strength of the concrete. The invention also provides a method for preparing the concrete nano reinforcing modifier.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a concrete nano-reinforcing modifier and a preparation method thereof.
Background
With the rapid development of the concrete industry, the consumption of concrete is increased, natural sand resources are deficient, a large-scale machine-made sand production line is started, and machine-made sand produced by a small-scale machine-made sand production line is a main fine aggregate resource in nearly two years. The existing machine-made sand has poor quality and generally shows the problems of complex parent material source, poor grading, sharp and polygonal particle shape, complex powder components, high mud content and the like, so that the workability of machine-made sand concrete is poor, and the problem is particularly prominent in medium and low grade concrete. The analysis of the research institute of industrial and technical information of building materials in China shows that 70-80% of the concrete in China is medium-low strength concrete, and the quality of the medium-low strength concrete can determine the overall level of the building quality in China. Therefore, the problem of workability of the machine-made sand concrete with medium-low strength grade is urgent.
In addition, cement is used as a main cementing material in concrete, and due to the continuous shortage of natural resource materials for firing cement clinker, the price of the cement is high and basically reaches more than 500 yuan/ton. The concrete water reducing agent (also called concrete synergist) is an emerging additive except for the concrete water reducing agent in the building market in recent years. The concrete admixture is required to reduce the raw material cost of the concrete by making the strength and durability of the concrete equal to those of the concrete with the original mixing ratio on the premise of reducing a certain amount of cementing materials (about 20kg of cement can be reduced in each cubic meter of concrete) and keeping the working performance unchanged. But the popularization and application of the concrete gel reducing agent also cause the evaluation of the market in a commendable and disproved way. On one hand, the glue reducing agent has a common effect, alcohol amine grinding aids are added in the cement production process, and the glue reducing agent (synergist) in the market mainly takes alcohol amines as main materials and has a weak effect on the cementing material. Under the current known condition, the concrete mixing proportion of the glue reducing agent is still higher. On the other hand, the adaptability of the glue reducing agent to materials is poor, so that the glue reducing agent in the market has high requirements on the variety of cement and has high adaptability; the cement has effects on some cements, once the clinker or the cement is changed, the phenomena of no effect can occur, and the cement has a certain selectivity and other aspects on the concrete raw materials, the mixing proportion and the like. In addition, the early strength and the later strength of the concrete are reduced by a plurality of gel reducers, and the application of the gel reducers in the concrete is greatly influenced by combining the aspects.
Therefore, the concrete admixture is urgently needed to be developed by combining the problems of concrete workability, the current situation of the glue reducing agent and the like in the market, and not only can solve the problem of concrete workability, but also can improve the concrete strength.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a concrete nano-reinforcing modifier and a preparation method thereof, wherein the concrete nano-reinforcing modifier is used for replacing glue reducers in the market, so that the workability of concrete is effectively improved, and the strength of the concrete is greatly improved.
The above object of the present invention is achieved by the following technical solutions:
the invention provides a concrete nanometer reinforcing modifier, which comprises 2-23 wt% of workability regulator, 0.06-5 wt% of surfactant, 2-21 wt% of nanometer crystal nucleus early strength agent, 3-25 wt% of composite activator, 0.2-5 wt% of emulsifier, 0.2-4 wt% of wetting agent, 0.2-6 wt% of auxiliary agent and the balance of water.
In the preferable scheme of the invention, the concrete nano-reinforcing modifier comprises, by weight, 5% -15% of a workability regulator, 0.1% -2% of a surfactant, 5% -15% of a nanocrystal core early strength agent, 5% -15% of a composite activator, 0.5% -2% of an emulsifier, 0.5% -2% of a wetting agent, 0.5% -3% of an auxiliary agent and the balance of water.
In a more preferable scheme of the invention, the concrete nano-reinforcing modifier comprises, by weight, 6.5% -10% of a workability regulator, 0.2% -1.2% of a surfactant, 8% -13% of a nanocrystal core early strength agent, 9% -12% of a composite activator, 0.7% -1.5% of an emulsifier, 0.5% -1.8% of a wetting agent, 0.9% -1.7% of an auxiliary agent, and the balance of water.
In the scheme of the invention, the workability regulator can be a commercial high-molecular polymer for regulating the workability of concrete, and the solid content is preferably not less than 5%.
In a preferred embodiment of the present invention, the nanocrystal core early strength agent is one or a combination of two of nano calcium silicate and nano lithium silicate.
In the preferable scheme of the invention, the composite excitant further comprises 50-80% of organic excitant and 20-50% of inorganic excitant in percentage by weight; more preferably, the activator comprises 65-75% of organic activator and 25-35% of inorganic activator.
In a further preferable scheme of the invention, the organic excitant is at least one of polyalcohol amine, urea, modified triisopropanolamine, tetrahydroxyethylenediamine, diethanol monoisopropanolamine, glycerol or sodium acetate; more preferably at least one of polyalcohol amine, modified triisopropanolamine, tetrahydroxyethylenediamine, glycerol, and diethanol monoisopropanolamine; most preferably at least one of polyalcohol amines, tetrahydroxyethylenediamine, diethanol monoisopropanolamine.
In a further preferable scheme of the invention, the inorganic activator is at least one of potassium silicate, potassium sulfate, sodium metasilicate, potassium carbonate, calcium nitrate and sodium thiocyanate; more preferably at least one of potassium silicate, sodium metasilicate, potassium carbonate and sodium thiocyanate; most preferably at least one of potassium silicate, sodium metasilicate, and potassium carbonate.
In a preferred embodiment of the present invention, the surfactant may be one or two selected from quaternary ammonium salt, alkyl glucoside, tween, alkylbenzene sulfonate, fatty alcohol sulfonate, and rosin resin; more preferably one or two of quaternary ammonium salt, tween and alkylbenzene sulfonate.
In a preferred embodiment of the present invention, the emulsifier may be one or two selected from dimethicone emulsifier, monoglyceride fatty acid glyceride, sucrose ester, polyol fatty acid ester, and sorbitan monooleate; more preferably one or two of a dimethicone emulsifier, a monoglyceride, and a polyol fatty acid ester.
In a preferred embodiment of the present invention, the wetting agent may be one selected from phosphate, polyoxyethylene alkylphenol ether, nonylphenol polyoxyethylene ether, and polyoxyethylene fatty alcohol ether; more preferably one of phosphate ester, polyoxyethylene alkylphenol ether and polyoxyethylene fatty alcohol ether.
In a preferred embodiment of the present invention, the auxiliary agent may be one or two selected from ricinoleic acid, sodium ricinoleate, sulfonated castor oil, span and defoaming agent; more preferably one or two of ricinoleic acid, span and antifoaming agent.
On the basis, the invention further provides a method for preparing the concrete nano reinforcing modifier, which comprises the following steps:
A1) mixing and stirring 3-25 parts by weight of composite exciting agent and water for 20-30 min;
A2) sequentially adding 0.2-5 parts by weight of emulsifier and 2-21 parts by weight of nanocrystal core early strength agent into the product obtained in A1), and stirring for 15-20 min;
A3) sequentially adding 0.2-4 parts by weight of wetting agent and 0.2-6 parts by weight of auxiliary agent into the product obtained in A2), and stirring for 10-15 min;
A4) adding 2-23 parts by weight of a workability regulator and 0.06-5 parts by weight of a surfactant into the product obtained in A3), adding water until the total weight of the mixture reaches 100 parts by weight, and stirring for 15-20 min to obtain the concrete nano-reinforcing modifier.
In the concrete nano reinforcing modifier, the workability regulator and the surfactant mainly play a role in regulating the workability of concrete and account for about 3-23% of the total weight of the modifier, the nanocrystal core early strength agent and the composite activator mainly play a role in reinforcing the concrete and account for about 9-35% of the total weight of the modifier, and the emulsifier, the wetting agent and the auxiliary agent mainly play a role in assisting dissolution of other functional components and account for about 1-12% of the total weight of the modifier. After the nano reinforcing modifier is added into concrete, the main action mechanism of the modifier is as follows: on one hand, the workability regulator and the surfactant act as workability regulating components, so that the richness of the concrete can be improved, and the workability of the concrete can be improved; on the other hand, the nanocrystal core early strength agent and the composite excitant play roles as reinforcing components, wherein the nanocrystal core permeates into a gelling system to be crystallized and promotes hydration, and then is combined with a plurality of excitants forming the composite excitant, so that the reactivity of cement and admixture can be modified, the activity of the whole gelling system is effectively excited, and the strength of concrete is integrally improved; in addition, the emulsifier, the wetting agent and the auxiliary agent play roles as solubilizing components, can effectively ensure the solubility of the nanocrystal core and the composite excitant, and form a stable system by reducing the surface mutual repulsion.
Compared with the glue reducing agent in the prior art, the modifier provided by the invention has the advantages of simple and feasible preparation process, no toxicity and pollution of a finished product, wide applicable material range and excellent overall modification effect.
Detailed Description
The present invention will be described in more detail with reference to specific examples.
Example 1
A concrete nanometer reinforcing modifier is prepared by mixing 7.8 percent of workability regulator, 0.2 percent of surfactant, 8 percent of nanocrystal core early strength agent, 9 percent of composite excitant, 0.7 percent of emulsifier, 0.5 percent of wetting agent, 0.9 percent of auxiliary agent and the balance of water according to weight percentage.
The workability regulator is a high molecular polymer for regulating the workability of concrete, and the solid content is not lower than 5%.
The nano crystal nucleus early strength agent is nano calcium silicate.
The composite excitant consists of 75 percent of organic excitant and 25 percent of inorganic excitant in percentage by weight. The organic excitant is a mixture of polyalcohol amine, modified triisopropanolamine and tetrahydroxy ethylenediamine. The inorganic activator is a mixture of potassium silicate, potassium sulfate and sodium metasilicate.
The preparation method of the concrete nano-reinforcing modifier of the embodiment is as follows: putting 9 parts by weight of the composite exciting agent and a certain amount of water into a stirring tank, and stirring for 20-30 min; sequentially adding 0.7 weight part of emulsifier and 8 weight parts of nano calcium silicate, and stirring for 15-20 min; then adding 0.5 weight part of wetting agent and 0.9 weight part of auxiliary agent, and stirring for 10-15 min; and finally, adding 7.8 parts by weight of high molecular polymer and workability regulator and 0.2 part by weight of surfactant, adding water to enable the total weight to reach 100 parts by weight, and stirring for 15-20 min to obtain the concrete nano-reinforcing modifier.
Example 2
A concrete nanometer reinforcing modifier is prepared by mixing 6.6 percent of workability regulator, 0.4 percent of surfactant, 12.8 percent of nanocrystal core early strength agent, 9.2 percent of composite excitant, 1.1 percent of emulsifier, 1.7 percent of wetting agent, 1.1 percent of auxiliary agent and the balance of water according to weight percentage.
The workability regulator is a high molecular polymer for regulating the workability of concrete, and the solid content is not lower than 5%.
The nano crystal nucleus early strength agent is a mixture of nano calcium silicate and nano lithium silicate.
The composite excitant comprises, by weight, 70% of organic excitant and 30% of inorganic excitant. The organic excitant is a mixture of polyalcohol amine, tetrahydroxy ethylenediamine and glycerol. The inorganic excitant is a mixture of sodium metasilicate, potassium carbonate and calcium nitrate.
The preparation method of the concrete nano-reinforcing modifier of the embodiment is as follows: 9.2 parts by weight of the composite exciting agent and a certain amount of water are put into a stirring tank and stirred for 20-30 min; sequentially adding 1.1 parts by weight of emulsifier, 12.8 parts by weight of mixture of nano calcium silicate and nano lithium silicate, and stirring for 15-20 min; then adding 1.7 parts by weight of wetting agent and 1.1 parts by weight of auxiliary agent, and stirring for 10-15 min; and finally, adding 6.6 parts by weight of high molecular polymer workability regulator and 0.4 part by weight of surfactant, adding water to enable the total weight to reach 100 parts by weight, and stirring for 15-20 min to obtain the concrete nano-reinforcing modifier.
Example 3
A concrete nanometer reinforcing modifier is prepared by mixing 7.9% of workability regulator, 1.1% of surfactant, 9.5% of nanocrystal core early strength agent, 9.5% of composite excitant, 1.1% of emulsifier, 0.8% of wetting agent, 1.3% of auxiliary agent and the balance of water in percentage by weight.
The workability regulator is a high molecular polymer for regulating the workability of concrete, and the solid content is not lower than 5%.
The nano crystal nucleus early strength agent is nano calcium silicate.
The composite excitant comprises 66% of organic excitant and 34% of inorganic excitant in percentage by weight. The organic excitant is a mixture of diethanol monoisopropanolamine, glycerol and sodium acetate; the inorganic activator is a mixture of potassium silicate, sodium metasilicate and sodium thiocyanate.
The preparation method of the concrete nano-reinforcing modifier of the embodiment is as follows: 9.5 parts by weight of the composite exciting agent and a certain amount of water are put into a stirring tank and stirred for 20-30 min; sequentially adding 1.1 parts by weight of emulsifier and 9.5 parts by weight of nano calcium silicate, and stirring for 15-20 min; then, 0.8 weight part of wetting agent and 1.3 weight parts of auxiliary agent are added, and stirring is carried out for 10-15 min; and finally, adding 7.9 parts by weight of high molecular polymer workability regulator and 1.1 parts by weight of surfactant, adding water to make the total weight reach 100 parts by weight, and stirring for 15-20 min to obtain the concrete nano-reinforcing modifier.
Example 4
A concrete nanometer reinforcing modifier is prepared by mixing 9% of workability regulator, 1.0% of surfactant, 9.7% of nanocrystal core early strength agent, 11.3% of composite excitant, 1.4% of emulsifier, 0.9% of wetting agent, 1.7% of auxiliary agent and the balance of water in percentage by weight.
The workability regulator is a high molecular polymer for regulating the workability of concrete, and the solid content is not lower than 5%.
The nano crystal nucleus early strength agent is nano calcium silicate.
The composite excitant consists of 77 percent of organic excitant and 23 percent of inorganic excitant in percentage by weight. The organic excitant is a mixture of polyalcohol amine, modified triisopropanolamine, tetrahydroxy ethylenediamine and glycerol. The inorganic activator is a mixture of potassium silicate, potassium carbonate, calcium nitrate and sodium thiocyanate.
The preparation method of the concrete nano-reinforcing modifier of the embodiment is as follows: putting 11.3 parts by weight of the composite exciting agent and a certain amount of water into a stirring tank, and stirring for 20-30 min; sequentially adding 1.4 parts by weight of emulsifier and 9.7 parts by weight of nano calcium silicate, and stirring for 15-20 min; then, 0.9 weight part of wetting agent and 1.7 weight parts of auxiliary agent are added, and stirring is carried out for 10-15 min; and finally, adding 9 parts by weight of high molecular polymer workability regulator and 1.0 part by weight of surfactant, adding water to enable the total weight to reach 100 parts by weight, and stirring for 15-20 min to obtain the concrete nano-reinforcing modifier.
Application example 1
Taking C30 concrete as an example, the mixing proportion is shown in Table 1, the mixing proportion of the concrete is kept unchanged, and a commercially available gel reducing agent (a gel reducing agent with triethanolamine as a main component) and the nano reinforcing modifiers prepared in examples 1 to 4 are respectively mixed into the concrete according to 0.6 percent of the gel material.
The performance test of the concrete mixture is carried out according to GB/T50080-2016 standard of the performance test method of the common concrete mixture, and the initial slump and the expansion degree are tested; the concrete compressive strength test is carried out according to GB/T50081 and 2019 'test method standard for physical and mechanical properties of concrete', the compressive strengths of the concrete 7d, 28d and 60d are tested, and the test result of the C30 concrete is shown in Table 2.
TABLE 1C 30 concrete mixing ratio (kg/m)3)
TABLE 2C 30 concrete test results
It can be seen from table 2 that, under the condition of keeping the mixing proportion and the cementing material unchanged, the workability of the concrete (modified concrete 1, modified concrete 2, modified concrete 3, and modified concrete 4) added with the nano reinforcing modifier of the embodiments 1 to 4 of the present invention can be significantly improved, and the compressive strength is significantly increased, which is generally increased by 3 to 5MPa compared with that of the standard concrete. The workability of the comparative concrete 1 added with the commercial gel reducing agent is improved, but the strength is not increased and is reduced, and particularly, the compressive strength of the later 60d is 2.5MPa lower than that of the reference.
Application example 2
Taking C40 concrete as an example, the mixing proportion is shown in Table 3, and the commercially available gel reducing agent (the gel reducing agent taking triethanolamine as the main component) and the nano reinforcing modifier prepared in the examples 1-4 are respectively mixed into the concrete according to 0.6 percent of the cementing material (in this case, the cement dosage is reduced by 30kg/m3In order to keep the volume weight unchanged, the mixing proportion of the medium sand is increased by 10kg/m3Increase stone by 20kg/m3) The comparative concrete 2 and the modified concrete 5-8 are prepared, and a glue reducing group which only reduces the consumption of glue materials and does not add a modifier is arranged at the same time.
The performance test of the concrete mixture is carried out according to GB/T50080-2016 standard of the performance test method of the common concrete mixture, and the initial slump and the expansion degree are tested; the concrete compressive strength test is carried out according to GB/T50081-2019 'test method standard for physical and mechanical properties of concrete', the compressive strengths of the concrete 7d, 28d and 60d are tested, and the test result of the C40 concrete is shown in Table 4.
TABLE 3C 40 concrete mix ratio (kg/m)3)
TABLE 4C 40 concrete test results
As can be seen from Table 4, the strength of the cement-reducing group without the modifier was significantly reduced from the reference group. At a reduction of 30kg/m3In the case of cement, the nano reinforcing modifier of the embodiments 1 to 4 of the invention is added into concrete, so that the workability of the concrete can be obviously improved, and the compressive strength of the concrete can be improved, so that the compressive strength of each modified concrete can reach the level even higher than that of the reference concrete. The workability of the comparative concrete 2 with the addition of the commercially available gel reducing agent was improved, but since the commercially available gel reducing agent had no effect on the increase in strength, the compressive strength of the comparative concrete 2 was not increased, and was significantly lower than that of the reference group at the reduced amount of the cementitious material.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the present invention without departing from the technical spirit of the present invention.
Claims (10)
1. A concrete nanometer reinforcing modifier comprises, by weight, 2% -23% of a workability regulator, 0.06% -5% of a surfactant, 2% -21% of a nanocrystal core early strength agent, 3% -25% of a composite activator, 0.2% -5% of an emulsifier, 0.2% -4% of a wetting agent, 0.2% -6% of an auxiliary agent and the balance of water.
2. The modifier of claim 1, wherein: the material comprises, by weight, 5-15% of a workability regulator, 0.1-2% of a surfactant, 5-15% of a nanocrystal core early strength agent, 5-15% of a composite activator, 0.5-2% of an emulsifier, 0.5-2% of a wetting agent, 0.5-3% of an auxiliary agent, and the balance of water.
3. The modifier of claim 1, wherein: the material comprises, by weight, 6.5-10% of a workability regulator, 0.2-1.2% of a surfactant, 8-13% of a nanocrystal core early strength agent, 9-12% of a composite activator, 0.7-1.5% of an emulsifier, 0.5-1.8% of a wetting agent, 0.9-1.7% of an auxiliary agent, and the balance of water.
4. The modifier according to any one of claims 1 to 3, characterized in that: the nano crystal nucleus early strength agent is one or the combination of two of nano calcium silicate or nano lithium silicate.
5. The modifier according to any one of claims 1 to 3, characterized in that: the composite excitant further comprises 50-80% of organic excitant and 20-50% of inorganic excitant in percentage by weight; preferably, the composite material consists of 65-75% of organic excitant and 25-35% of inorganic excitant.
6. The modifier of claim 5, wherein: the organic excitant is any one or a mixture of more than two of polyalcohol amine, urea, modified triisopropanolamine, tetrahydroxy ethylenediamine, diethanol monoisopropanolamine, glycerol or sodium acetate; preferably one or a mixture of more than two of polyalcohol amine, modified triisopropanolamine, tetrahydroxyethylenediamine, glycerol and diethanol monoisopropanolamine; most preferred is one or a mixture of two or more of polyalcohol amine, tetrahydroxyethylenediamine and diethanol monoisopropanolamine.
7. The modifier of claim 5, wherein: the inorganic activator is any one or a mixture of more than two of potassium silicate, potassium sulfate, sodium metasilicate, potassium carbonate, calcium nitrate and sodium thiocyanate; preferably one or a mixture of more than two of potassium silicate, sodium metasilicate, potassium carbonate and sodium thiocyanate; most preferred is any one or a mixture of two or more of potassium silicate, sodium metasilicate and potassium carbonate.
8. The modifier according to any one of claims 1 to 3, characterized in that: the surfactant is selected from one or a mixture of more than two of quaternary ammonium salt, alkyl glucoside, tween, alkylbenzene sulfonate, fatty alcohol sulfonate and rosin resin; preferably one or a mixture of more than two of quaternary ammonium salt, tween and alkylbenzene sulfonate.
9. The modifier according to any one of claims 1 to 3, characterized in that: the emulsifier is selected from one or more of simethicone emulsifier, monoglyceride fatty acid glyceride, sucrose ester, polyalcohol fatty acid ester, and sorbitan monooleate; preferably one or more of dimethicone emulsifier, monoglyceride fatty acid ester, and polyalcohol fatty acid ester; the wetting agent is selected from one or a mixture of more than two of phosphate, polyoxyethylene alkylphenol ether, polyoxyethylene nonyl phenyl ether and polyoxyethylene fatty alcohol ether; preferably one or a mixture of more than two of phosphate ester, polyoxyethylene alkylphenol ether and polyoxyethylene fatty alcohol ether; the auxiliary agent is selected from one or a mixture of more than two of ricinoleic acid, sodium ricinoleate, sulfonated castor oil, span and defoaming agent; preferably ricinoleic acid, span and/or antifoaming agent.
10. A method for preparing a concrete nano-reinforcing modifier, comprising the steps of:
A1) mixing and stirring 3-25 parts by weight of composite exciting agent and water for 20-30 min;
the composite excitant further comprises 50-80% of organic excitant and 20-50% of inorganic excitant in percentage by weight; further preferably, the composite material consists of 65-75% of organic excitant and 25-35% of inorganic excitant;
the organic excitant is preferably one or a mixture of more than two of polyalcohol amine, urea, modified triisopropanolamine, tetrahydroxy ethylenediamine, diethanol monoisopropanolamine, glycerol or sodium acetate; further preferably one or a mixture of two or more of polyalcohol amine, modified triisopropanolamine, tetrahydroxyethylenediamine, glycerol and diethanol monoisopropanolamine; most preferably one or a mixture of two or more of polyalcohol amine, tetrahydroxy ethylenediamine and diethanol monoisopropanolamine;
the inorganic activator is preferably one or a mixture of more than two of potassium silicate, potassium sulfate, sodium metasilicate, potassium carbonate, calcium nitrate and sodium thiocyanate; further preferably one or a mixture of two or more of potassium silicate, sodium metasilicate, potassium carbonate and sodium thiocyanate; most preferably any one or a mixture of more than two of potassium silicate, sodium metasilicate and potassium carbonate;
A2) sequentially adding 0.2-5 parts by weight of emulsifier and 2-21 parts by weight of nanocrystal core early strength agent into the product obtained in A1), and stirring for 15-20 min;
the emulsifier is one or a mixture of more than two of dimethyl silicone oil emulsifier, monoglyceride fatty acid glyceride, sucrose ester, polyalcohol fatty acid ester and sorbitan monooleate, preferably one or a mixture of more than two of dimethyl silicone oil emulsifier, monoglyceride fatty acid ester and polyalcohol fatty acid ester;
the nano crystal nucleus early strength agent is one or the combination of two of nano calcium silicate or nano lithium silicate;
A3) sequentially adding 0.2-4 parts by weight of wetting agent and 0.2-6 parts by weight of auxiliary agent into the product obtained in A2), and stirring for 10-15 min;
the wetting agent is any one or a mixture of more than two of phosphate, polyoxyethylene alkylphenol ether, polyoxyethylene nonyl phenyl ether and polyoxyethylene fatty alcohol ether, preferably any one or a mixture of more than two of phosphate, polyoxyethylene alkylphenol ether and polyoxyethylene fatty alcohol ether;
the auxiliary agent is any one or a mixture of more than two of ricinoleic acid, sodium ricinoleate, sulfonated castor oil, span and defoaming agent; preferably, the castor oil acid, span and the defoaming agent are any one or a mixture of more than two of the castor oil acid, the span and the defoaming agent;
A4) adding 2-23 parts by weight of a workability regulator and 0.06-5 parts by weight of a surfactant into the product obtained in A3); the workability regulator is a high molecular polymer with solid content not less than 5 percent for regulating the workability of concrete; the surfactant is selected from one or a mixture of more than two of quaternary ammonium salt, alkyl glucoside, tween, alkylbenzene sulfonate, fatty alcohol sulfonate and rosin resin, and preferably one or a mixture of more than two of quaternary ammonium salt, tween and alkylbenzene sulfonate; and then adding water until the total weight of the mixture reaches 100 parts by weight, and stirring for 15-20 min to obtain the concrete nano-reinforcing modifier.
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| CN113735482A (en) * | 2021-08-10 | 2021-12-03 | 中海油田服务股份有限公司 | Emulsion suspended early strength agent and preparation method thereof |
| CN117383862A (en) * | 2023-10-13 | 2024-01-12 | 长沙千巽新材料科技有限公司 | Air entraining agent regulator and preparation method and application thereof |
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| CN113735482A (en) * | 2021-08-10 | 2021-12-03 | 中海油田服务股份有限公司 | Emulsion suspended early strength agent and preparation method thereof |
| CN117383862A (en) * | 2023-10-13 | 2024-01-12 | 长沙千巽新材料科技有限公司 | Air entraining agent regulator and preparation method and application thereof |
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