High performance concrete impervious water proofing agent for building

A technology of high-performance concrete and anti-seepage and waterproofing agent, which is applied in the field of high-performance concrete anti-seepage and waterproofing agent for construction. It can solve the problems of corrosion of internal steel bars, limited effectiveness, and hazards to concrete performance, achieving outstanding use effects and simple production processes. , Ease of use

Inactive Publication Date: 2003-11-12
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For a long time, people have adopted various measures to solve the anti-leakage problem of concrete, such as increasing the amount of cement, improving aggregate gradation, etc., but the effect is limited, and the cost increases, and the crack problem still cannot be solved
In the past few decades, people have also adopted measures to improve the impermeability of concrete by adding admixtures such as triethanolamine and ferric chloride, but none of them can solve the cracking problem of concrete, and improper use of triethanolamine can easily cause serious damage to concrete performance. The chemical iron has a corrosive effect on the internal steel bars and has been restricted in use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1, high-performance concrete anti-seepage water-repellent agent for building is by naphthalenesulfonic acid formaldehyde condensate 8% (percentage by weight, the same below), calcium sulfate expansion agent 76.9399%, sodium 12 alkylbenzenesulfonate 0.0001%, organosilicon 0.06% and 15% silica fume, mixed with this admixture accounting for 8% of the cement weight, can make the water reduction rate reach 16%, the bleeding rate ratio reaches 45%, and the concrete can be used for 3 days, 7 days and 28 days The compressive strength ratios are 164%, 147% and 135% respectively, and the concrete penetration height ratio is below 40%.

Embodiment 2

[0025] Embodiment 2, high-performance concrete anti-seepage and waterproofing agent for construction is composed of 12% of naphthalenesulfonic acid formaldehyde condensate, 63% of calcium sulfoaluminate expansion agent, 0.0001% of sodium 12 alkylbenzenesulfonate, 0.06% of organic silicon, and silica fume It is formulated with 24.9399% of the weight of the cement. Adding this admixture accounting for 8% of the cement weight can make the water reducing rate reach 25%, the bleeding rate ratio reach 25%, and the compressive strength ratio of concrete in 3 days, 7 days and 28 days respectively 210%, 187% and 145%, and the concrete penetration height ratio is below 30%.

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Abstract

The present invention relates to a high-performance concrete impervious water-proofing agent. It is formed from naphthalene series high-effective water-reducing agent, expanding agent, sodium dodecyl benzene sulfonate, organic silicon and grammite. The application of said invention can greatly improve and raise impervious property of concrete, its anticracking property and chemical corrosion resistance, and can greatly raise the concrete early, medium and after compression strength, it can be extensively used in underground engineering and marine engineering.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a high-performance concrete anti-seepage and water-repellent agent for building. Background technique [0002] Cracking and leakage of buildings and various structures has almost become a major quality problem in today's concrete structures. There is a saying that "the sky is cloudy and it rains all night", which expresses people's helplessness about house leakage. [0003] Cement concrete usually has a large amount of water, and after hardening and drying, a large number of connected capillary pores are formed inside the cement stone and at the aggregate-slurry interface. In addition, the volume shrinks during the drying process, which is prone to cracking after being restrained, which is even more aggravated. its leakage hazard. [0004] For a long time, people have adopted various measures to solve the anti-leakage problem of concrete, such as increasin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B22/00C04B24/22C04B24/40
Inventor 孙振平蒋正武
Owner TONGJI UNIV
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