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Additive for pervious concrete and application thereof

A permeable concrete and admixture technology, which is applied in the field of concrete admixtures, can solve the problems of low strength, poor work performance, and poor durability in the later stage, and achieve the effects of improving fluidity, preventing drying and condensation, and improving durability and strength in the later stage

Inactive Publication Date: 2015-04-22
JIANGSU MINGHE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To meet the above requirements, special admixtures need to be adjusted. At present, there is no special admixture for permeable concrete. In actual projects, ordinary concrete admixtures are often used instead, which will cause permeable concrete to dry and set too quickly, making it difficult to unload. materials, poor durability, low strength in the later stage, poor work performance and other problems, which bring a lot of inconvenience to production and construction personnel

Method used

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  • Additive for pervious concrete and application thereof
  • Additive for pervious concrete and application thereof
  • Additive for pervious concrete and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1: (1) By mass ratio polyethylene glycol: butyl methacrylate: methyl methacrylate: vinyl ether-based polyoxyethylene: maleic anhydride: water = 2: 2: 5: 25: 5: Mix the components in a ratio of 61, and react at 70-100°C until a yellow-brown viscous liquid appears to prepare a polycarboxylate water-reducer; Melamine = 75:15:10 mixing the components to prepare the air-entraining agent; (3) by mass ratio polycarboxylate water reducer: aminotrimethylphosphoric acid: hydroxymethyl cellulose ether: air-entraining Agent: water = 40: 2.5: 1: 0.5: 56 Proportion of each component, mixing and stirring evenly to obtain the admixture for permeable concrete. When preparing concrete according to the construction mix ratio of C25 permeable concrete, the amount of the above-mentioned admixture is 1.8% of the mass of the cementitious material, and the performance test results of the permeable concrete added with the above-mentioned admixture are listed in the following table:

[...

Embodiment 2

[0015] Example 2: (1) By mass ratio polyethylene glycol: butyl methacrylate: methyl methacrylate: vinyl ether-based polyoxyethylene: maleic anhydride: water = 2: 2: 5: 25: 5: Mix the components in a ratio of 61, and react at 70-100°C until a yellow-brown viscous liquid appears to prepare a polycarboxylate water-reducer; Melamine = 80:10:10 mixing the components to prepare the air-entraining agent; (3) by mass ratio polycarboxylate water reducer: phosphobutane tricarboxylic acid: polyacrylamide: air-entraining agent: water = 48: 2.3: 0.9: 0.8: 48 Proportion of each component, mixing and stirring evenly to obtain the admixture for permeable concrete. When preparing concrete according to the construction mix ratio of C25 permeable concrete, the amount of the above-mentioned admixture is 2.0% of the mass of the cementitious material, and the performance test results of the permeable concrete with the above-mentioned admixture are listed in the following table:

[0016]

Embodiment 3

[0017] Example 3: (1) By mass ratio polyethylene glycol: butyl methacrylate: methyl methacrylate: vinyl ether-based polyoxyethylene: maleic anhydride: water = 2: 2: 5: 25: 5: Mix the components in a ratio of 61, and react at 70-100°C until a yellow-brown viscous liquid appears to prepare a polycarboxylate water-reducer; Melamine = 78: 12: 12 and mix the components to prepare the air-entraining agent; (3) by mass ratio, polycarboxylate water reducer: phosphobutane tricarboxylic acid: starch: air-entraining agent: water = 46 : 2.3: 1: 0.8: 48 Proportion of each component, mixing and stirring evenly to obtain the admixture for permeable concrete. When preparing concrete according to the construction mix ratio of C25 permeable concrete, the amount of the above-mentioned admixture is 2.0% of the mass of the cementitious material, and the performance test results of the permeable concrete with the above-mentioned admixture are listed in the following table:

[0018]

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Abstract

The invention discloses an additive for pervious concrete. The additive for the pervious concrete comprises a water reducer, a retarder, a viscosity modifier, an entraining agent and water, wherein the mass ratio of the water reducer to the retarder to the viscosity modifier to the entraining agent to the water is (30-50): (1-3): (0.5-3): (0.3-1.5): (42-60). The invention further discloses the application of the additive for the pervious concrete. The additive for the pervious concrete has the advantages that for the application requirement of the pervious concrete, the additive special for the pervious concrete is provided; after the additive is added to the pervious concrete to be used, the fluidity of the pervious concrete can be improved, premature drying and condensation can be avoided, unloading is facilitated, and the durability and the long-term strength of the previous concrete are improved.

Description

technical field [0001] The invention relates to an admixture for concrete and its application, in particular to an admixture for permeable concrete and its application. 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] The successful application of pervious concrete requires the following: it can be quickly unloaded from the mixer truck and achieve a certain degree of compactness, and there is no flow of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/38C04B24/26C04B24/24
Inventor 臧军王晓明宋生辉马树泉
Owner JIANGSU MINGHE GRP
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