Specialadmixture for pervious concrete and application ofspecialadmixture

A technology of permeable concrete and admixture, applied in concrete admixture and its application field, can solve problems such as difficult transportation of permeable concrete, achieve the effects of improving durability and later strength, solving easy clogging and good performance

Inactive Publication Date: 2017-09-15
SICHUAN HUASHI GREEN HOMELAND BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, in order to solve the above-mentioned deficiencies, the present invention provides a special admixture for permeable concrete and its application; to overcome the problem that the existing permeable concrete is not easy to be transported by tank truck, after using the admixture, the permeable concrete can be put into the tank without In the event of clogging, it can have good working performance after being out of the tanker, and has good cohesiveness, without bottom sealing and hole blocking

Method used

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  • Specialadmixture for pervious concrete and application ofspecialadmixture
  • Specialadmixture for pervious concrete and application ofspecialadmixture

Examples

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example 1

[0023] Example 1: Polycarboxylate superplasticizer by mass ratio: sodium gluconate: hydroxypropyl methylcellulose: calcium stearate: calcium formate: redispersible latex powder=7.4:0.26:0.2:36.8:18:36.8 The components are mixed in proportion to obtain the special admixture for permeable concrete. When preparing concrete according to the construction mix ratio of C30 permeable concrete, the amount of the above-mentioned admixture is 5.5% of the amount of the cementitious material. The performance test results of the permeable concrete with the above-mentioned admixture are as follows:

[0024]

example 2

[0025] Example 2: According to the mass ratio of polycarboxylate water reducer: sodium gluconate: hydroxyethyl cellulose: palmitic acid: calcium formate: redispersible latex powder = 10.36:0.71:0.3:29.6:14.8:44.4 ratio mixing Components to obtain special admixtures for permeable concrete. When preparing concrete according to the construction mix ratio of C25 permeable concrete, the amount of the above-mentioned admixture is 3.4% of the amount of the cementitious material. The performance test results of the permeable concrete with the above-mentioned admixture are as follows:

[0026]

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Abstract

The invention discloses a specialadmixture for pervious concrete and application of the specialadmixture. Thespecial admixture comprises the following materials in weight percent: 5 to 15 percent (solid content) of a water reducing agent; 0.1 to 1 percent of a retarder; 0.1 to 1 percent of a thickener; 15 to 25 percent of an early strength agent; 25 to 50 percent of a water-repellent agent; 25 to 50 percent of rubber powder. The admixture overcomes the problem that the existing pervious concrete is not easy to transport bya tanker, and ensures that the phenomenon of blocking cannot occur when the pervious concrete is put into a tanker after the admixture is used, has excellent service behavior after the pervious concrete is discharged from the tanker, and has excellent cohesiveness, without phenomena of bottom sealing and hole blocking.

Description

technical field [0001] The invention relates to an admixture for concrete and its application field, 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] Pervious concrete (Pervious Concrete) is a porous concrete with continuous pores made by a special process of specific gradation of aggregate, cement, water, admixtures and admixtures. Its apparent density is generally 1600~2100kg / m3, 28d compressive strength is 10~40MPa, flexural strength is 2~7MPa, water permeabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38
CPCC04B40/0039C04B2103/302C04B24/10C04B24/383C04B24/085C04B24/04C04B2103/0057
Inventor 吴鑫刘登贤向鹏江晓君关素敏麻鹏飞
Owner SICHUAN HUASHI GREEN HOMELAND BUILDING MATERIALS
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