阅读说明：本技术 透水混凝土液体增强剂及其制备方法和使用方法 (Permeable concrete liquid reinforcing agent and preparation method and use method thereof ) 是由 王锴 陈团结 苗思雨 向豪 许丽 樊孟孟 臧晓宁 屈腾 于 2019-08-28 设计创作，主要内容包括：本发明涉及透水混凝土液体增强剂及其制备方法和使用方法,具体由去离子水55-65份、早强催化剂23-25份、高效减水剂4-5份、可再分散性乳胶粉3-5份、聚乙烯醇2-4份、水泥抗碱剂2-3份、着色剂1-2份制成。所得增强剂以液体形式添加,易于拌和均匀；在使混凝土达到同等性能条件下能降低增强剂用量20%以上,从而降低了增强剂总体成本上；能显著混凝土强度；能抑制混凝土表面泛碱；可直接对混凝土进行染色。(The invention relates to a permeable concrete liquid reinforcing agent, a preparation method and a using method thereof, and the permeable concrete liquid reinforcing agent is specifically prepared from 55-65 parts of deionized water, 23-25 parts of an early strength catalyst, 4-5 parts of a high-efficiency water reducing agent, 3-5 parts of redispersible latex powder, 2-4 parts of polyvinyl alcohol, 2-3 parts of a cement alkali-resistant agent and 1-2 parts of a coloring agent. The obtained reinforcing agent is added in a liquid form, and is easy to mix uniformly; the dosage of the reinforcing agent can be reduced by more than 20 percent under the condition that the concrete achieves the same performance, thereby reducing the overall cost of the reinforcing agent; the strength of the concrete can be obvious; can inhibit the surface of concrete from efflorescence; the concrete can be directly dyed.)

1. The pervious concrete liquid reinforcing agent is characterized in that:

the composition is prepared from the following components in parts by weight:

55-65 parts of deionized water;

23-25 parts of an early strength catalyst;

4-5 parts of a high-efficiency water reducing agent;

3-5 parts of redispersible latex powder;

2-4 parts of polyvinyl alcohol;

2-3 parts of a cement alkali-resistant agent;

1-2 parts of a coloring agent.

2. The pervious concrete liquid reinforcing agent of claim 1, characterized in that:

the early strength catalyst is selected from one or more of calcium oxide, calcium chloride, sodium nitrite, sodium chloride, sodium sulfate and triethanolamine.

3. The pervious concrete liquid reinforcing agent of claim 2, characterized in that:

the high-efficiency water reducing agent is selected from one or more of a polycarboxylic acid water reducing agent, a lignosulfonate water reducing agent and a sulfamate naphthalene water reducing agent.

4. The pervious concrete liquid reinforcing agent of claim 3, characterized in that:

the dispersible latex powder is selected from one or more of ethylene/vinyl acetate copolymer, vinyl acetate/ethylene/acrylate copolymer and vinyl acetate/ethylene/methyl methacrylate copolymer.

5. The pervious concrete liquid reinforcing agent of claim 4, characterized in that:

the polyvinyl alcohol is selected from one or two of 1788 type and 1799 type.

6. The pervious concrete liquid reinforcing agent of claim 5, wherein:

the cement alkali-resistant agent is glycol.

7. The pervious concrete liquid reinforcing agent of claim 6, characterized in that:

the colorant is water-based color paste.

8. The preparation method of the permeable concrete liquid reinforcing agent is characterized by comprising the following steps:

the method is realized by the following steps:

the method comprises the following steps: uniformly stirring 55-65 parts by weight of deionized water, 23-25 parts by weight of early strength catalyst and 2-3 parts by weight of cement alkali-resistant agent at 60-80 ℃ to completely dissolve the early strength catalyst and the cement alkali-resistant agent in the deionized water to form a solution A;

step two: stirring and mixing 4-5 parts by weight of a high-efficiency water reducing agent and the solution A uniformly at normal temperature to obtain a solution B;

step three: heating the solution B to 90-95 ℃, adding 3-5 parts by weight of redispersible latex powder and 2-4 parts by weight of polyvinyl alcohol under stirring conditions, wherein the rotating speed of a stirrer is 300r/min, so that the redispersible latex powder and the polyvinyl alcohol are fully dispersed and dissolved in the solution B to form a stable liquid mixture;

step four: adding 1-2 parts by weight of colorant under stirring according to the color requirement of the pervious concrete to obtain the pervious concrete liquid reinforcing agent.

9. The method for preparing a pervious concrete liquid reinforcing agent according to claim 8, characterized in that:

the early strength catalyst is selected from one or more of calcium oxide, calcium chloride, sodium nitrite, sodium chloride, sodium sulfate and triethanolamine;

the high-efficiency water reducing agent is selected from one or more of a polycarboxylic acid water reducing agent, a lignosulfonate water reducing agent and a sulfamate naphthalene water reducing agent;

the dispersible latex powder is selected from one or more of ethylene/vinyl acetate copolymer, vinyl acetate/ethylene/acrylate copolymer and vinyl acetate/ethylene/methyl methacrylate copolymer;

the polyvinyl alcohol is selected from one or two of 1788 type and 1799 type;

the cement alkali-resistant agent is ethylene glycol;

the colorant is water-based color paste.

10. The use method of the permeable concrete liquid reinforcing agent is characterized in that:

firstly, 6-8 parts of permeable concrete liquid reinforcing agent and 100 parts of water are mixed and stirred uniformly, and then the mixture is mixed with cement and aggregate according to the designed mixing proportion of the permeable concrete to obtain the permeable concrete.

Technical Field

The invention belongs to the technical field of building materials, and particularly relates to a permeable concrete liquid reinforcing agent, and a preparation method and a use method thereof.

Background

The pervious concrete is a novel concrete pavement material developed by countries such as Europe, America, Japan and the like, mainly aims at the defects of the pavement of the original urban road, can allow rainwater to flow into the ground, effectively replenish underground water, relieve some urban environmental problems such as rapid decline of the underground water level of a city and the like, and can effectively eliminate the harm of oil compounds on the ground and the like to environmental pollution. Meanwhile, the method has positive effects of protecting underground water, maintaining ecological balance and relieving urban heat island effect. Has special significance for benign development of human living environment, urban rainwater management, water pollution prevention and control and other works. However, due to the lack of fine aggregate, continuous gradation cannot be formed, the overall strength of the pervious concrete is low, and a reinforcing agent is needed to enhance the strength of the concrete.

The traditional powder reinforcing agent has poor dispersion in the concrete mixing process, poor film forming property in concrete and general reinforcing effect.

Disclosure of Invention

The invention aims to provide a pervious concrete liquid reinforcing agent, a preparation method and a use method thereof, which can effectively improve the strength, visual effect and water permeability of pervious concrete.

The technical scheme adopted by the invention is as follows:

the pervious concrete liquid reinforcing agent is characterized in that:

the composition is prepared from the following components in parts by weight:

55-65 parts of deionized water;

23-25 parts of an early strength catalyst;

4-5 parts of a high-efficiency water reducing agent;

3-5 parts of redispersible latex powder;

2-4 parts of polyvinyl alcohol;

2-3 parts of a cement alkali-resistant agent;

1-2 parts of a coloring agent.

The early strength catalyst is selected from one or more of calcium oxide, calcium chloride, sodium nitrite, sodium chloride, sodium sulfate and triethanolamine.

The high-efficiency water reducing agent is selected from one or more of a polycarboxylic acid water reducing agent, a lignosulfonate water reducing agent and a sulfamate naphthalene water reducing agent.

The dispersible latex powder is selected from one or more of ethylene/vinyl acetate copolymer, vinyl acetate/ethylene/acrylate copolymer and vinyl acetate/ethylene/methyl methacrylate copolymer.

The polyvinyl alcohol is selected from one or two of 1788 type and 1799 type.

The cement alkali-resistant agent is glycol.

The colorant is water-based color paste.

The preparation method of the permeable concrete liquid reinforcing agent is characterized by comprising the following steps:

the method is realized by the following steps:

the method comprises the following steps: uniformly stirring 55-65 parts by weight of deionized water, 23-25 parts by weight of early strength catalyst and 2-3 parts by weight of cement alkali-resistant agent at 60-80 ℃ to completely dissolve the early strength catalyst and the cement alkali-resistant agent in the deionized water to form a solution A;

step two: stirring and mixing 4-5 parts by weight of a high-efficiency water reducing agent and the solution A uniformly at normal temperature to obtain a solution B;

step three: heating the solution B to 90-95 ℃, adding 3-5 parts by weight of redispersible latex powder and 2-4 parts by weight of polyvinyl alcohol under stirring conditions, wherein the rotating speed of a stirrer is 300r/min, so that the redispersible latex powder and the polyvinyl alcohol are fully dispersed and dissolved in the solution B to form a stable liquid mixture;

step four: adding 1-2 parts by weight of colorant under stirring according to the color requirement of the pervious concrete to obtain the pervious concrete liquid reinforcing agent.

The early strength catalyst is selected from one or more of calcium oxide, calcium chloride, sodium nitrite, sodium chloride, sodium sulfate and triethanolamine;

the high-efficiency water reducing agent is selected from one or more of a polycarboxylic acid water reducing agent, a lignosulfonate water reducing agent and a sulfamate naphthalene water reducing agent;

the dispersible latex powder is selected from one or more of ethylene/vinyl acetate copolymer, vinyl acetate/ethylene/acrylate copolymer and vinyl acetate/ethylene/methyl methacrylate copolymer;

the polyvinyl alcohol is selected from one or two of 1788 type and 1799 type;

the cement alkali-resistant agent is ethylene glycol;

the colorant is water-based color paste.

The use method of the permeable concrete liquid reinforcing agent is characterized in that:

firstly, 6-8 parts of permeable concrete liquid reinforcing agent and 100 parts of water are mixed and stirred uniformly, and then the mixture is mixed with cement and aggregate according to the designed mixing proportion of the permeable concrete to obtain the permeable concrete.

The invention has the following advantages:

compared with the traditional powdery compact concrete reinforcing agent, the permeable concrete liquid reinforcing agent has the following characteristics: the additive is added in a liquid form, so that the mixture is easy to mix uniformly; the dosage of the reinforcing agent can be reduced by more than 20 percent under the condition that the concrete achieves the same performance, thereby reducing the overall cost of the reinforcing agent; the strength of the concrete can be obvious; can inhibit the surface of concrete from efflorescence; the concrete can be directly dyed.

Detailed Description

The present invention will be described in detail with reference to specific embodiments.

The pervious concrete is composed of aggregate, cement, water, additives and the like, and the aggregate with single gradation or discontinuous gradation is mostly adopted to form a skeleton pore structure. The pervious concrete meets the strength requirement and simultaneously needs to keep a certain through hole to meet the requirement of water permeability, so that the aim of ensuring the strength and the porosity is fulfilled by selecting proper raw materials, and also by a mixing proportion design, a preparation process and additives during preparation. The invention is mainly directed to pervious concrete.

The invention relates to a pervious concrete liquid reinforcing agent which is prepared from the following components in parts by weight:

55-65 parts of deionized water;

23-25 parts of an early strength catalyst;

4-5 parts of a high-efficiency water reducing agent;

3-5 parts of redispersible latex powder;

2-4 parts of polyvinyl alcohol;

2-3 parts of a cement alkali-resistant agent;

1-2 parts of a coloring agent.

The preparation method of the permeable concrete liquid reinforcing agent is realized by the following steps:

the method comprises the following steps: uniformly stirring 55-65 parts by weight of deionized water, 23-25 parts by weight of early strength catalyst and 2-3 parts by weight of cement alkali-resistant agent at 60-80 ℃ to completely dissolve the early strength catalyst and the cement alkali-resistant agent in the deionized water to form a solution A;

step two: stirring and mixing 4-5 parts by weight of a high-efficiency water reducing agent and the solution A uniformly at normal temperature to obtain a solution B;

step three: heating the solution B to 90-95 ℃, adding 3-5 parts by weight of redispersible latex powder and 2-4 parts by weight of polyvinyl alcohol under stirring conditions, wherein the rotating speed of a stirrer is 300r/min, so that the redispersible latex powder and the polyvinyl alcohol are fully dispersed and dissolved in the solution B to form a stable liquid mixture;

step four: adding 1-2 parts by weight of colorant under stirring according to the color requirement of the pervious concrete to obtain the pervious concrete liquid reinforcing agent.

The early strength catalyst is selected from one or more of calcium oxide, calcium chloride, sodium nitrite, sodium chloride, sodium sulfate and triethanolamine.

The high-efficiency water reducing agent is selected from one or more of a polycarboxylic acid water reducing agent, a lignosulfonate water reducing agent and a sulfamate naphthalene water reducing agent.

The dispersible latex powder is selected from one or more of ethylene/vinyl acetate copolymer, vinyl acetate/ethylene/acrylate copolymer and vinyl acetate/ethylene/methyl methacrylate copolymer.

The polyvinyl alcohol is selected from one or two of 1788 type and 1799 type.

The cement alkali-resistant agent is glycol.

The colorant is water-based color paste.

The use method of the permeable concrete liquid reinforcing agent comprises the following steps: firstly, 6-8 parts of permeable concrete liquid reinforcing agent and 100 parts of water are mixed and stirred uniformly, and then the mixture is mixed with cement and aggregate according to the designed mixing proportion of the permeable concrete to obtain the permeable concrete.

In the invention, deionized water is used as a solvent, so that other additives can be effectively dissolved at a molecular level, and the deionized water can participate in cement hydration reaction; the addition of the early strength catalyst can accelerate the hydration speed of cement, promote the development of early strength of concrete and simultaneously do not influence the later strength of the concrete; the high-efficiency water reducing agent can effectively reduce the mixing water consumption, improve the fluidity and save cement under the condition of maintaining the slump constant of concrete; after the redispersible latex powder is pre-dispersed in water, the redispersible latex powder can be uniformly dispersed in the whole concrete framework to form a continuous reticular membrane structure, so that the integral strength of the pervious concrete is effectively improved; the polyvinyl alcohol is used as a protective colloid, the integral cohesion of the mixture is enhanced after film formation, the surface energy of slurry on the surfaces of the gaps is effectively reduced, and the hydrophobic effect on the surfaces of the gaps is increased, so that the improvement of the water permeability is facilitated; the cement alkali-resistant agent can obviously reduce the content of free calcium oxide of pervious concrete and inhibit the generation of surface efflorescence phenomenon; the addition of the coloring agent can realize the color change of the pervious concrete.