Cement based penetrative crystallized waterproof material and its preparation

A technology of waterproof material and osmotic crystallization, applied in cement coatings, antifouling/underwater coatings, paints containing biocides, etc. The method is simple, the construction work is simple, and the adaptability is good.

Inactive Publication Date: 2004-02-04
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the cement-based waterproof materials commonly used at present are surface-sealed waterproofing agents. The waterproof effect only acts on the surface, and cannot automatically and deeply penetrate into the interior of the structure; the waterproof effect is not long-lasting, and a continuous degradation process occurs over time; once If the waterproof coating is damaged, the waterproof ability will be lost; it will easily lead to weak points such as alkali-aggregate reaction (AAR) in concrete

Method used

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Embodiment Construction

[0037] High-performance permeable crystalline waterproof material, composed of siloxane, sodium methylnaphthalenesulfonate condensate, potassium aluminum sulfate dodecahydrate, sodium sulfate, Portland cement, calcium hydroxide, magnesium hydroxide, bentonite, quartz sand . In specific implementation process, each component weight percent is:

[0038] According to the above-mentioned ratio and the above-mentioned preparation method, high-performance cement-based permeable crystalline waterproof materials with slightly different performance requirements and suitable for different occasions can be prepared.

[0039] High-performance cement-based permeable crystalline waterproof material, mixed with water at a ratio of 1:0.3-.35 to form a thixotropic, fluid slurry, brushed on the wet concrete base, the active ingredients penetrate into the Inside the concrete, and react to form insoluble crystals such as ettringite. Its active chemical substances undergo a hydration reaction ...

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Abstract

A penetration-crystallization type cement-base water-proof material for building is prepared from silicate cement, sodium methyl naphthalenesulfonate condensate, water silane emulsion, dodecahydrated aluminium potassium sulfate, magnesium hydroxide, calcium hydroxide, sodium silicate, bentone and quartz sand through proportional mixing. Its advantages are high penetrability and crystallinity, permanent water-proof effect, and self-repairing of fine cracking.

Description

technical field [0001] The invention relates to a cement-based waterproof coating material for construction, in particular to a high-performance cement-based waterproof and anti-leakage coating material for cement, mortar, and concrete in water conservancy, hydraulic engineering, hydropower, bridges, tunnels, underground, and construction projects. Penetrates crystalline waterproof coating material. Background technique [0002] Due to its high brittleness, concrete structures often crack inevitably in engineering applications. This kind of cracking leads to the decrease of water tightness and leakage of the concrete structure, which affects the service life of the project, and even cannot be used normally. This is a common problem in the construction industry. There are two main reasons for cracks in concrete structures, one is caused by deformation, including shrinkage, expansion, and uneven subsidence caused by changes in temperature and humidity; the other is caused by...

Claims

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Application Information

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IPC IPC(8): C09D1/06C09D5/16
Inventor 蒋正武孙振平
Owner TONGJI UNIV
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