Flexible water-proofing powder and preparation method

Abstract

The invention brings forward a flexible water-proofing powder and a preparation method. The invention is characterized in that the flexible water-proofing powder comprises components: by weight, 40-60 parts of mineral powder, 20-30 parts of flexible graphite, 5-15 parts of a free calcium agent, 5-15 parts of a thixotropic lubricant, 3-8 parts of an inorganic polymer, 2-3 parts of a dispersant and 1-2 parts of a plasticizer. Flexible graphite is used as an elastic buffer material. With a layered loose structure of the flexible graphite, infiltration, roasting and dispersion are conducted to obtain flexible graphite with calcium ions. The elastic flexible graphite can be used to eliminate concrete deformation at later stage, and through a delayed reaction of the calcium ions, sodium and potassium ions are replaced to form a flexible compact colloid during water seepage of waterproof mortar or concrete or moistening. Tiny crack seepage caused by building shrinkage can be prevented during later use, and the defect that a present polymer flexible waterproof material is easy to age and a rigid water-proofing powder is easy to crack is avoided effectively. The flexible water-proofing powder can be widely applied in waterproof and moistureproof function of a basement, waterproof function of a building roof and exterior walls, waterproof function of a underground garage and overall waterproof function of a pool, a water tower and the like, and also can be directly doped in cement mortar to prepare flexible waterproof mortar.

Description

Technical field [0001] The present invention involves the field of waterproof materials and specifically involves a flexible waterproof powder and preparation methods. Background technique [0002] The leakage of the building is mainly used as a mixture during the use of concrete and mortar. When the water hard gel (cement) harden, the water inside the gel evaporates, leaving a lot of pores. Generally, large holes can be generally possible.By adding fine sets for blocking, but the pores cannot be blocked by general fine sets, which directly causes decreased concrete and mortar resistance. This is also the root cause of the leakage of the building. [0003] The traditional waterproof material is mainly based on asphalt coils and apron roll materials, and the purpose of waterproofing the water leakage surface is achieved.During the waterproof construction, waterproof construction needs to be tailored according to the shape of the waterproof base. For the complex grassroots, the wat...

AI Technical Summary

Problems solved by technology

Chinese Invention Patent Publication No. CN101648786B discloses a crack-resistance and anti-seepage waterproof powder for mortar and its preparation method. The crack-resistance and anti-seepage waterproof powder for mortar is composed of dense powder, expansion material, water reducing agent, water-repellent agent and air-entraining agent. Mixing into cement concrete and mortar can change the disadvantages of brittleness, cracking and insufficient compactness of cement cement materials

[0006] The above-mentioned flexible waterproof itself has a certain degree of stretching and ductility, has good deformation ability, can resist the cracking of the base layer within the elastic range of the waterproof material, and can prevent cracks to a certain extent, but due to its high price and short service life, it is easy to Aging failure; waterproof powder belongs to rigid waterproofing, with a long durability and synchronous with the life of the building. Brittle cracks causing water leakage

Although the current waterproofing powder offsets the tensile stress and shrinkage cracking caused by the shrinkage of concrete by adding expansion agents, it is only limited to the concrete curing period and the early stage. The cracks that still occur in the later period of the building due to settlement have become a new hidden danger of water leakage.