CN109809739B - Function regulator for concrete composite fine aggregate and preparation method thereof - Google Patents
Function regulator for concrete composite fine aggregate and preparation method thereof Download PDFInfo
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Abstract
The application provides a function regulator for concrete composite fine aggregate, and the raw materials of the function regulator comprise a viscosity reduction regulator, a water reducing agent, an alcamines mixed solution and water; wherein the raw materials of the viscosity reduction regulator comprise acrylamide, methacrylic acid, a silane coupling agent, polyethylene glycol methyl ether and water; wherein the raw materials of the alcamines mixed solution comprise triethanolamine, diethanol monoisopropanolamine, hydroxypropyl methylcellulose and water; the application also provides a preparation method of the functional regulator; compared with the traditional construction, the functional regulator is added, the admixture is removed, the cement consumption is reduced, the aggregate consumption is increased, the total mass of the concrete is ensured to be unchanged, the working performance and the strength of the concrete meet the requirements, and the strength is improved while the cost is reduced and the concrete preparation operation is simplified; in conclusion, the functional regulator can overcome the defect of poor homogeneity of concrete after the composite fine aggregate is used.
Description
Technical Field
The invention relates to the technical field of concrete, in particular to a function regulator for concrete composite fine aggregate and a preparation method thereof.
Background
With the exhaustion of natural river sand, the natural fine aggregate used in concrete is less and less, the artificial fine aggregate (also called artificial sand, including machine-made sand, clastic sand and washing sand) used in concrete is more and more, but the problems of more serious grading and irregular grain type exist in the machine-made sand, clastic sand and washing sand, and the grading and grading problems are more obvious particularly in the sand produced by adopting a washing process.
Because the supply of the natural fine aggregate is more and more tense at present, the technical personnel in the field develop a technology for preparing the composite fine aggregate by mixing materials such as lithium slag, titanium gypsum or iron tailings and artificial sand, the composite fine aggregate utilizes the materials such as the lithium slag, the titanium gypsum or the iron tailings to make up the grading grade and the particle shape irregularity of the artificial sand, so that the composite fine aggregate has a more reasonable grading grade and particle shape, thereby solving the problem of the grading grade and the particle shape irregularity of the artificial sand, not influencing or even improving the performances such as the durability, the slump, the strength and the like of concrete, being simple and efficient, reasonably realizing secondary utilization of solid waste resources such as the lithium slag, the titanium gypsum or the iron tailings and the like, solving the problem that the solid waste resources are difficult to recycle and pollute the environment, saving energy and protecting the environment.
With the increasing application of the composite fine aggregate in concrete, the composite fine aggregate is poor in concrete homogeneity such as fine aggregate sinking and poor in flowability in concrete application due to the use of various mine tailings and industrial solid wastes and further due to the fact that the density, water absorption, crushing value, components and the like of different mine tailings and industrial solid wastes are different.
The problem of poor homogeneity is solved by increasing the amount of gelling material. But the increase of the dosage of the cementing material can lead to the obvious increase of the concrete cost, and the increase of the dosage of the cementing material can lead to the obvious phenomena of concrete cracking, poor durability and slow increase rate of later strength.
How to adopt other more reasonable methods to solve the defects of poor concrete homogeneity such as fine aggregate sinking, poor fluidity and the like of the concrete using the composite fine aggregate is a technical problem which needs to be solved urgently by the technical personnel in the field.
Disclosure of Invention
The invention aims to provide a function regulator for concrete composite fine aggregate. The invention also aims to provide a preparation method of the function regulator for the concrete composite fine aggregate.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a function regulator for concrete composite fine aggregate is prepared by mixing multiple raw materials, wherein the raw materials of the function regulator comprise a viscosity reduction regulator, a water reducing agent, an alcohol amine mixed solution and water;
wherein the addition mass of the viscosity reduction regulator accounts for 3-5% of the mass percent of the functional regulator of the finished product;
the adding mass of the water reducing agent accounts for 20-30% of the mass percent of the functional regulator of the finished product;
the adding mass of the alcamines mixed solution accounts for 1-5% of the mass percent of the functional regulator of the finished product;
the adding mass of water in the function regulator is the balance of the finished product of the function regulator except all other raw materials;
the viscosity reduction regulator is prepared by mixing multiple raw materials, wherein the raw materials of the viscosity reduction regulator comprise acrylamide, methacrylic acid, a silane coupling agent, polyethylene glycol methyl ether and water, and the mass ratio of the acrylamide to the methacrylic acid to the silane coupling agent to the polyethylene glycol methyl ether to the water is (0.5-1.5): (0.5-1.5): (0.5-1.5): (4-6): (1-3);
the alcohol-amine mixed solution is formed by mixing various raw materials, wherein the raw materials of the alcohol-amine mixed solution comprise triethanolamine, diethanol monoisopropanolamine, hydroxypropyl methyl cellulose and water;
wherein the adding mass of the triethanolamine accounts for 30-50% of the mass percent of the alcohol amine mixed liquor of the finished product;
the adding mass of the diethanol monoisopropanolamine accounts for 30-50% of the mass percent of the alcohol amine mixed solution of the finished product;
the adding mass of the hydroxypropyl methyl cellulose accounts for 1-10% of the mass percent of the alcohol amine mixed solution of the finished product;
the adding mass of water in the alcohol amine mixed solution is the balance of the finished product of the alcohol amine mixed solution except all the other raw materials.
Preferably, the viscosity-reducing regulator is prepared from acrylamide, methacrylic acid, a silane coupling agent, polyethylene glycol methyl ether and water according to a mass ratio (0.5-1.5): (0.5-1.5): (0.5-1.5): (4-6): (1-3) stirring and mixing for 2h at 40 ℃.
Preferably, the water reducing agent is a slump-retaining polycarboxylic acid water reducing agent.
A preparation method of the function regulator for the concrete composite fine aggregate comprises the following steps in sequence:
1) preparing a viscosity reduction regulator according to a formula; preparing alcamines mixed liquor according to a formula;
2) weighing a viscosity reduction regulator, a water reducing agent, an alcamines mixed solution and water according to a formula for later use;
3) firstly, adding the viscosity reduction regulator into water, stirring and mixing uniformly, then adding the water reducing agent, stirring and mixing uniformly, then adding the alcamines mixed solution, stirring and mixing uniformly until the solution is uniform, and obtaining the finished functional regulator.
The application provides a function regulator for concrete composite fine aggregate, which is formed by mixing a plurality of raw materials, wherein the raw materials of the function regulator comprise a viscosity reduction regulator, a water reducing agent, an alcamines mixed solution and water;
wherein the addition mass of the viscosity reduction regulator accounts for 3-5% of the mass percent of the functional regulator of the finished product;
the adding mass of the water reducing agent accounts for 20-30% of the mass percent of the functional regulator of the finished product;
the adding mass of the alcamines mixed solution accounts for 1-5% of the mass percent of the functional regulator of the finished product;
the adding mass of water in the function regulator is the balance of the finished product of the function regulator except all other raw materials;
the viscosity reduction regulator is prepared by mixing multiple raw materials, wherein the raw materials of the viscosity reduction regulator comprise acrylamide, methacrylic acid, a silane coupling agent, polyethylene glycol methyl ether and water, and the mass ratio of the acrylamide to the methacrylic acid to the silane coupling agent to the polyethylene glycol methyl ether to the water is (0.5-1.5): (0.5-1.5): (0.5-1.5): (4-6): (1-3);
the alcohol-amine mixed solution is formed by mixing various raw materials, wherein the raw materials of the alcohol-amine mixed solution comprise triethanolamine, diethanol monoisopropanolamine, hydroxypropyl methyl cellulose and water;
wherein the adding mass of the triethanolamine accounts for 30-50% of the mass percent of the alcohol amine mixed liquor of the finished product;
the adding mass of the diethanol monoisopropanolamine accounts for 30-50% of the mass percent of the alcohol amine mixed solution of the finished product;
the adding mass of the hydroxypropyl methyl cellulose accounts for 1-10% of the mass percent of the alcohol amine mixed solution of the finished product;
the adding mass of water in the alcohol amine mixed solution is the balance of the finished product of the alcohol amine mixed solution except all the other raw materials;
the application also provides a preparation method of the function regulator for the concrete composite fine aggregate;
the application creatively provides a solution idea for solving the defects of poor concrete homogeneity such as fine aggregate sinking, poor fluidity and the like of the concrete after the composite fine aggregate is used by adding the functional regulator, and provides a formula and a preparation method of the functional regulator, and the data of laboratory tests and field practical application prove that: compared with the comparative example of the traditional construction, the functional regulator is directly added and used, so that the working performance and the strength of the concrete are improved;
compared with the comparative example of the traditional construction, on the basis of the aim of simple production operation process, the working performance and the strength of the concrete can be further improved after the additive is removed and a small amount of functional regulator is added;
compared with the comparative example of the traditional construction, the concrete construction method has the advantages that the consumption of cement is reduced based on the purpose of concrete cost consideration, the total mass of the concrete is ensured to be unchanged, the consumption of aggregates (including coarse aggregates and fine aggregates) is increased, the working performance and the strength of the concrete meet the requirements, and the strength is improved while the cost is reduced; in conclusion, the function of the functional regulator is obvious, and the defects of poor concrete homogeneity such as fine aggregate sinking, poor fluidity and the like of the concrete using the composite fine aggregate can be overcome.
Detailed Description
For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to further illustrate the features and advantages of the invention and not to limit the scope of the claims.
The application provides a function regulator for concrete composite fine aggregate, which is formed by mixing a plurality of raw materials, wherein the raw materials of the function regulator comprise a viscosity reduction regulator, a water reducing agent, an alcamines mixed solution and water;
wherein the addition mass of the viscosity reduction regulator accounts for 3-5% of the mass percent of the functional regulator of the finished product;
the adding mass of the water reducing agent accounts for 20-30% of the mass percent of the functional regulator of the finished product;
the adding mass of the alcamines mixed solution accounts for 1-5% of the mass percent of the functional regulator of the finished product;
the adding mass of water in the function regulator is the balance of the finished product of the function regulator except all other raw materials;
the viscosity reduction regulator is prepared by mixing multiple raw materials, wherein the raw materials of the viscosity reduction regulator comprise acrylamide, methacrylic acid, a silane coupling agent, polyethylene glycol methyl ether and water, and the mass ratio of the acrylamide to the methacrylic acid to the silane coupling agent to the polyethylene glycol methyl ether to the water is (0.5-1.5): (0.5-1.5): (0.5-1.5): (4-6): (1-3);
the alcohol-amine mixed solution is formed by mixing various raw materials, wherein the raw materials of the alcohol-amine mixed solution comprise triethanolamine, diethanol monoisopropanolamine, hydroxypropyl methyl cellulose and water;
wherein the adding mass of the triethanolamine accounts for 30-50% of the mass percent of the alcohol amine mixed liquor of the finished product;
the adding mass of the diethanol monoisopropanolamine accounts for 30-50% of the mass percent of the alcohol amine mixed solution of the finished product;
the adding mass of the hydroxypropyl methyl cellulose accounts for 1-10% of the mass percent of the alcohol amine mixed solution of the finished product;
the adding mass of water in the alcohol amine mixed solution is the balance of the finished product of the alcohol amine mixed solution except all the other raw materials.
In an embodiment of the present application, the viscosity-reducing regulator is prepared from acrylamide, methacrylic acid, a silane coupling agent, polyethylene glycol methyl ether, and water in a mass ratio of (0.5-1.5): (0.5-1.5): (0.5-1.5): (4-6): (1-3) stirring and mixing for 2h at 40 ℃.
In an embodiment of the present application, the water reducing agent is a slump retaining type polycarboxylic acid water reducing agent, and the preparation method thereof is as follows: simultaneously dripping 30 wt% acrylic acid solution and 2-3 wt% vitamin C solution into 50 wt% methoxypolyethylene glycol solution for 4h, and controlling the temperature to about 30 ℃. .
The application also provides a preparation method of the functional regulator for the concrete composite fine aggregate, which comprises the following steps of:
1) preparing a viscosity reduction regulator according to a formula; preparing alcamines mixed liquor according to a formula;
2) weighing a viscosity reduction regulator, a water reducing agent, an alcamines mixed solution and water according to a formula for later use;
3) firstly, adding the viscosity reduction regulator into water, stirring and mixing uniformly, then adding the water reducing agent, stirring and mixing uniformly, then adding the alcamines mixed solution, stirring and mixing uniformly until the solution is uniform, and obtaining the finished functional regulator.
The function and effect of each compound raw material in the formulation of the application are as follows:
viscosity reduction regulator: acrylamide is used for dispersing fine particles in concrete; methacrylic acid provides double bond polymerization; the silane coupling agent provides air-entraining and lubricating functions and has a great effect on the expansion degree of concrete; the polyethylene glycol methyl ether has obvious effect on the slump increase of concrete;
alcohol amine mixed liquor: the triethanolamine has the function of improving the early strength of the concrete; the function of the diethanol monoisopropanolamine is to improve the later strength of the concrete; hydroxypropyl methylcellulose is used to improve the wrapping and cohesiveness of concrete.
This application, in part, has a total of three formulations: the formula of the functional regulator, the formula of the viscosity reduction regulator and the formula of the alcohol amine mixed solution are all mixtures of various chemical raw materials, but the formula of the viscosity reduction regulator, the formula of the alcohol amine mixed solution and the formula of the functional regulator are divided into the following reasons, namely, the formula of the viscosity reduction regulator, the formula of the alcohol amine mixed solution and the formula of the functional regulator, without directly adding all the chemical raw materials into a container to be stirred and mixed according to a total formula: 1. chemical reactions can occur among chemical raw materials; 2. the viscosity reduction regulator is a macromolecular polymer formed by polymerizing a plurality of compounds, and the finished product of the viscosity reduction regulator has stable performance after being independently prepared and synthesized; 3. the compound in the alcamines mixed solution is alkaline and is easy to react with the compound in the viscosity reduction regulator, so that the effect of the functional regulator is reduced; 4. triethanolamine, diethanol monoisopropanolamine and methacrylic acid are subjected to polymerization reaction, so that the strength of concrete is influenced; therefore, the viscosity-reducing regulator and the alcohol amine mixed solution are prepared separately and then mixed to prepare the functional regulator.
In order to further understand the present invention, the following examples are given to illustrate the functional regulator for concrete composite fine aggregate and the preparation method thereof in detail, and the scope of the present invention is not limited by the following examples.
Example 1
A function regulator for concrete composite fine aggregate is prepared by mixing multiple raw materials, wherein the raw materials of the function regulator comprise a viscosity reduction regulator, a water reducing agent, an alcohol amine mixed solution and water;
wherein the addition mass of the viscosity reduction regulator accounts for 4% of the mass percent of the functional regulator of the finished product;
the adding mass of the water reducing agent accounts for 25 percent of the mass of the finished functional regulator;
the adding mass of the alcamines mixed liquor accounts for 3 percent of the mass of the finished functional regulator;
the adding mass of water in the function regulator is the balance of the finished product of the function regulator except all other raw materials;
wherein the water reducing agent is a slump-retaining polycarboxylic acid water reducing agent;
the viscosity reduction regulator is prepared by mixing various raw materials, and is prepared from acrylamide, methacrylic acid, a silane coupling agent, polyethylene glycol methyl ether and water according to a mass ratio of 1: 1: 1: 5: 2 stirring and mixing for 2h at 40 ℃;
the alcohol-amine mixed solution is formed by mixing various raw materials, wherein the raw materials of the alcohol-amine mixed solution comprise triethanolamine, diethanol monoisopropanolamine, hydroxypropyl methyl cellulose and water;
wherein the adding mass of the triethanolamine accounts for 40% of the mass percent of the alcohol amine mixed liquor of the finished product;
the adding mass of the diethanol monoisopropanolamine accounts for 40 percent of the mass of the alcohol amine mixed solution of the finished product;
the adding mass of the hydroxypropyl methyl cellulose accounts for 6 percent of the mass of the alcohol amine mixed liquor of the finished product;
the adding mass of water in the alcohol amine mixed solution is the balance of the finished product of the alcohol amine mixed solution except all the other raw materials.
The preparation method of the function regulator for concrete composite fine aggregate in the embodiment 1 comprises the following steps in sequence:
1) preparing a viscosity reduction regulator according to a formula; preparing alcamines mixed liquor according to a formula;
2) weighing a viscosity reduction regulator, a water reducing agent, an alcamines mixed solution and water according to a formula for later use;
3) firstly, adding the viscosity reduction regulator into water, stirring and mixing uniformly, then adding the water reducing agent, stirring and mixing uniformly, then adding the alcamines mixed solution, stirring and mixing uniformly until the solution is uniform, and obtaining the finished functional regulator.
Concrete samples were prepared from the functional modifiers prepared in example 1 according to the concrete formulation in example 1 in table 1, and the performance test results of the prepared concrete samples are shown in table 1 below.
Example 2
Concrete samples were prepared from the functional modifiers prepared in example 1 according to the concrete formulation in example 2 in table 1, and the performance test results of the prepared concrete samples are shown in table 1 below.
Example 3
Concrete samples were prepared from the functional modifiers prepared in example 1 according to the concrete formulation in example 3 in table 1, and the performance test results of the prepared concrete samples are shown in table 1 below.
TABLE 1 results of performance test experiments for functional modifiers in examples 1-3
In table 1 above: in example 1, compared with comparative example 1, the working performance and strength of the concrete are improved by directly adding and using the functional regulator, wherein the strength is improved by 2-6 MPa;
in example 2, compared with comparative example 1, based on the purpose of simple production operation process, the working performance and strength of the concrete are further improved after the admixture is removed and a small amount of functional regulator is added, and the strength is improved by about 5 MPa;
in example 3, compared with comparative example 1, based on the purpose of concrete cost consideration, the amount of cement is reduced, the weight of concrete is ensured to be unchanged, the amount of aggregate (including coarse aggregate and fine aggregate) is increased, the working performance and strength of concrete meet the requirements, and the strength is improved by 2-3MPa while the cost is reduced;
in conclusion, the function of the function regulator is obvious.
The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (3)
1. A function regulator for concrete composite fine aggregate is characterized in that the function regulator is formed by mixing a plurality of raw materials, wherein the raw materials of the function regulator comprise a viscosity reduction regulator, a water reducing agent, an alcohol amine mixed solution and water;
wherein the addition mass of the viscosity reduction regulator accounts for 3-5% of the mass percent of the functional regulator of the finished product;
the adding mass of the water reducing agent accounts for 20-30% of the mass percent of the functional regulator of the finished product;
the adding mass of the alcamines mixed solution accounts for 1-5% of the mass percent of the functional regulator of the finished product;
the adding mass of water in the function regulator is the balance of the finished product of the function regulator except all other raw materials;
the viscosity reduction regulator is prepared by mixing multiple raw materials, wherein the raw materials of the viscosity reduction regulator comprise acrylamide, methacrylic acid, a silane coupling agent, polyethylene glycol methyl ether and water, and the mass ratio of the acrylamide to the methacrylic acid to the silane coupling agent to the polyethylene glycol methyl ether to the water is (0.5-1.5): (0.5-1.5): (0.5-1.5): (4-6): (1-3);
the alcohol-amine mixed solution is formed by mixing various raw materials, wherein the raw materials of the alcohol-amine mixed solution comprise triethanolamine, diethanol monoisopropanolamine, hydroxypropyl methyl cellulose and water;
wherein the adding mass of the triethanolamine accounts for 30-50% of the mass percent of the alcohol amine mixed liquor of the finished product;
the adding mass of the diethanol monoisopropanolamine accounts for 30-50% of the mass percent of the alcohol amine mixed solution of the finished product;
the adding mass of the hydroxypropyl methyl cellulose accounts for 1-10% of the mass percent of the alcohol amine mixed solution of the finished product;
the adding mass of water in the alcohol amine mixed solution is the balance of the finished product of the alcohol amine mixed solution except all the other raw materials;
the water reducing agent is a slump-retaining polycarboxylic acid water reducing agent.
2. The functional regulator for the concrete composite fine aggregate according to claim 1, wherein the viscosity-reducing regulator is prepared from acrylamide, methacrylic acid, a silane coupling agent, polyethylene glycol methyl ether and water according to a mass ratio of (0.5-1.5): (0.5-1.5): (0.5-1.5): (4-6): (1-3) stirring and mixing for 2h at 40 ℃.
3. A method for preparing a function-adjusting agent for concrete composite fine aggregate according to any one of claims 1 or 2, comprising the steps of, in order:
1) preparing a viscosity reduction regulator according to a formula; preparing alcamines mixed liquor according to a formula;
2) weighing a viscosity reduction regulator, a water reducing agent, an alcamines mixed solution and water according to a formula for later use;
3) firstly, adding the viscosity reduction regulator into water, stirring and mixing uniformly, then adding the water reducing agent, stirring and mixing uniformly, then adding the alcamines mixed solution, stirring and mixing uniformly until the solution is uniform, and obtaining the finished functional regulator.
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| CN111423151B (en) * | 2020-03-03 | 2022-04-12 | 深圳市三绿科技有限公司 | Concrete cementing material regulator and preparation method thereof |
| CN111847953B (en) * | 2020-05-30 | 2022-06-21 | 广州砼奇杰建材科技有限公司 | Solid waste aggregate regulator and regulating method thereof and concrete |
| CN113248180A (en) * | 2021-04-12 | 2021-08-13 | 广西军泰建材有限公司 | Aggregate regulator for concrete and preparation method thereof |
| CN115124274A (en) * | 2022-06-29 | 2022-09-30 | 四川嘉兆丰新材料科技有限公司 | Efficient novel thickening agent and preparation method thereof |
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