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Additive for cement base water permeation concrete

A technology of permeable concrete and admixture, applied in the field of building materials, can solve the problems of violation and inability to reduce the harmful pore content of cement-based permeable concrete, and achieve the effects of reducing water consumption, improving slump retention capacity, and reducing concrete water consumption.

Active Publication Date: 2017-03-08
重庆绿恒环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the admixture described in this patent does not contain any defoaming agent, and cannot reduce the content of harmful pores in cement-based permeable concrete, which violates the principle of "destroying large bubbles and leaving small bubbles" when compounding admixtures

Method used

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  • Additive for cement base water permeation concrete
  • Additive for cement base water permeation concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The components are mixed according to the following parts by mass to prepare the admixture for cement-based permeable concrete:

[0026] The dosage of early-strength and high-water-reducing polycarboxylic acid mother liquor is 6 parts; the super-slow-release polycarboxylic acid mother liquor is RHEOPLUS412 mother liquor of BASF (BASF), Germany, and the dosage is 3 parts; the early-strength agent is hexacyanate, and the dosage is 0.7 parts; organic The retarder is sodium gluconate, the dosage is 1 part; the inorganic retarder is sodium tripolyphosphate, the dosage is 0.2 parts; the viscosity modifier is 8 parts; the air-entraining agent is sodium α-olefin sulfonate, the dosage is 0.2 parts; The defoaming agent is polyether modified silicone, the dosage is 1.2 parts; the internal moisture regulator is sodium acrylate, the dosage is 0.3 parts; the surface moisture regulator is sorbitol, the dosage is 0.5 parts; the water, the dosage is 78.9 parts.

Embodiment 2

[0028] The components are mixed according to the following parts by mass to prepare the admixture for cement-based permeable concrete:

[0029] 5 parts of early-strength and high-water-reducing polycarboxylate mother liquor; 3 parts of RMC-3 mother liquor of super slow-release polycarboxylate mother liquor from Swiss Sika Company (Sika); 0.8 parts of organic alcohol amine as early-strength agent; The organic retarder is tartaric acid, the dosage is 1.5 parts; the inorganic retarder is sodium hexametaphosphate, the dosage is 0.3 parts; the viscosity modifier is 5 parts; The foaming agent is silicone defoamer, the dosage is 2 parts; the internal moisture regulator is starch grafted sodium polyacrylate, the dosage is 0.2 parts; the surface moisture regulator is sorbitol, the dosage is 0.4 parts; the water, the dosage is 81.7 parts.

Embodiment 3

[0031] The components are mixed according to the following parts by mass to prepare the admixture for cement-based permeable concrete:

[0032] The dosage of early-strength and high-water-reducing polycarboxylic acid mother liquor is 5.5 parts; the super-slow-release polycarboxylic acid mother liquor is RHEOPLUS412 mother liquor of BASF (BASF), Germany, and the dosage is 3 parts; the early-strength agent is sodium nitrate, and the dosage is 0.7 parts; organic retarding The agent is sucrose, the dosage is 1.1 parts; the inorganic retarder is sodium hexametaphosphate, the dosage is 0.3 parts; the viscosity modifier is 10 parts; the air-entraining agent is α-sodium olefin sulfonate, the dosage is 0.4 parts; Polyether defoaming agent, the dosage is 1 part; the internal moisture regulator is sodium polyacrylate, the dosage is 0.4 parts; the surface moisture regulator is sorbitol, the dosage is 0.3 parts; water, the dosage is 77.3 parts.

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Abstract

The invention discloses an additive for cement base water permeation concrete. The additive comprises, by weight, 5-6 parts of early strength high water-reducing polycarboxylic acid mother solution, 2-3 parts of super slow release polycarboxylic acid mother solution, 0.5-1 part of early strength agent, 0.5-1.5 parts of organic condensation retarder, 0.1-0.5 part of inorganic condensation retarder, 3-10 parts of viscosity modifier, 0.1-0.5 part of air entraining agent, 0.1-3 parts of defoaming agent, 0.1-0.5 part of internal moisture regulator, 0.3-0.5 part of surface moisture regulator and 70-90 parts of water. The additive can effectively enhance the early strength and low slump keeping ability of the cement base water permeation concrete, reduce the air content of the newly batched concrete slurry and lower the water sensitivity, and increase the water preservation and moisture retention.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to an admixture for cement-based permeable concrete. Background technique [0002] Permeable concrete is an eco-friendly concrete. It is a concrete with continuous pores made through material research and special technology. It has both certain strength and certain air and water permeability. Permeable concrete is a pavement material that can not only satisfy the road performance, but also coexist harmoniously with the natural environment, and construct a comfortable living environment for human beings. The circulation of water is of great significance to increasing groundwater resources in cities, alleviating the heat island effect, and improving the urban climate. [0003] Chinese patent CN102976658A discloses a special admixture for permeable concrete and a preparation method thereof. The thickener described in this patent is dextrin or cellulose ether. The main f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42
CPCC04B40/0039C04B24/2641C04B24/2688C04B24/125C04B24/10C04B22/16C04B2103/0068C04B24/16C04B24/42C04B24/04C04B24/02C04B24/122C04B24/06C04B22/085C04B24/32
Inventor 周顺鄂谭晓帆肖新冉光建谢迁李琪吴成林
Owner 重庆绿恒环保科技有限公司
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