Pervious concrete special-purpose additive and use thereof

A permeable concrete and admixture technology, which is applied in the field of concrete admixtures, can solve the problems of slurry sinking, loss of slurry work performance, rapid water loss, etc., and achieve good bonding performance and improved strength over time.

Active Publication Date: 2016-12-07
JIANGSU SOBUTE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Problems of pervious concrete in long-distance transportation: pervious concrete is porous during stacking and transportation and construction, and there is a large amount of water evaporation inside and on the surface, and the water loss is fast; the loss of the working performance of the slurry its

Method used

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  • Pervious concrete special-purpose additive and use thereof
  • Pervious concrete special-purpose additive and use thereof
  • Pervious concrete special-purpose additive and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Polycarboxylate superplasticizer, polycarboxylate slump retaining agent, maltodextrin and chitosan, sodium carboxymethylcellulose and Wenlun gum, sugar and water in a mass ratio of 10:10:2:1:2: 75 ratio, mixed and stirred evenly, to obtain a special admixture for permeable concrete. When preparing concrete according to the construction mix ratio of C25 permeable concrete, the dosage of the above-mentioned admixture is 2.0% of the mass of the cementitious material.

Embodiment 2

[0027] Polycarboxylate superplasticizer, polycarboxylate slump retaining agent, maltodextrin and chitosan, sodium carboxymethylcellulose and Wenlun gum, sugar and water in a mass ratio of 10:10:2:1:2: 75 ratio, mixed and stirred evenly, to obtain a special admixture for permeable concrete. When preparing concrete according to the construction mix ratio of C25 permeable concrete, the dosage of the above-mentioned admixture is 1.0% of the mass of the cementitious material.

Embodiment 3

[0029] Polycarboxylate superplasticizer, polycarboxylate slump retaining agent, sodium polyacrylate and sorbitol, xanthan gum and polyvinyl pyrrolidone, sodium citrate and water in a mass ratio of 20:15:3:5 : 5:52 ratio, mixed and stirred evenly, to obtain special admixture for permeable concrete. When preparing concrete according to the construction mix ratio of C25 permeable concrete, the dosage of the above-mentioned admixture is 1.0% of the mass of the cementitious material.

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PUM

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Abstract

The invention discloses a pervious concrete special-purpose additive and a use thereof. The pervious concrete special-purpose additive comprises, by mass, 10-20% of a polycarboxylic acid water reducer, 5-25% of a polycarboxylic acid slump retaining agent, 0.5-3% of a water-retaining agent, 0.5-5% of a thickening agent, 1-5% of a delayed coagulant and 52-75% of water. A mass ratio of the additive to the gelling material in the pervious concrete is 1-2%. Ingredients of the pervious concrete special-purpose additive produce good synergism. The pervious concrete special-purpose additive guarantees water permeability, well keeps pervious concrete workability for 2h or more, improves strength after aging and realizes pervious concrete premixing production.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures in building materials, in particular to a special admixture for permeable concrete and its application. Background technique [0002] "Sponge city" is an important direction for the development of new urbanization in the "13th Five-Year Plan". The construction of "sponge city" with natural accumulation, natural infiltration and natural purification will effectively solve the problem of waterlogging and water shortage in some cities, which will help improve the urban ecological environment and increase social benefits, which is an urgent need for new urbanization construction. [0003] Permeable concrete has good water permeability, high water storage capacity and good decoration. It is a new type of material worth promoting in the construction of "sponge city". Permeable concrete is not mixed with fine aggregate, and is made by mixing cementitious material, coarse aggregate, admixture...

Claims

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Application Information

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IPC IPC(8): C04B24/38
CPCC04B40/0039C04B2103/302C04B24/38C04B24/383C04B24/24C04B24/10C04B24/26C04B24/02C04B24/06
Inventor 王方刚姜骞刘建忠陆加越
Owner JIANGSU SOBUTE NEW MATERIALS
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