Flexible water-proofing powder and preparation method

Abstract

The invention proposes a flexible waterproof powder and a preparation method, which is characterized in that the components are calculated by weight: 40-60 parts of mineral powder, 20-30 parts of flexible graphite, 5-15 parts of free calcium agent, thixotropic lubrication 5-15 parts of agent, 3-8 parts of inorganic polymer, 2-3 parts of dispersant, 1-2 parts of plasticizer. The present invention uses flexible graphite as the elastic buffer material, utilizes the layered loose structure of flexible graphite, and obtains flexible graphite carrying calcium ions through infiltration, roasting, and dispersion. Reaction, when the waterproof mortar or concrete seeps or becomes wet, it replaces sodium and potassium ions to form a flexible and dense colloid. It can prevent tiny cracks and leakage caused by the shrinkage of buildings in the later use, and effectively avoid the defects that the current polymer flexible waterproof materials are easy to age and rigid waterproof powder is easy to crack. It can be widely used in the waterproofing and moisture-proofing of basements, the waterproofing of roofs and exterior walls of buildings, the waterproofing of underground garages, the overall waterproofing of pools and water towers, and can also be directly mixed into cement mortar to prepare flexible waterproof mortar.

Description

technical field [0001] The invention relates to the field of waterproof materials, in particular to a flexible waterproof powder and a preparation method. Background technique [0002] The leakage of buildings is mainly due to the use of water as a mixing agent during the use of concrete and mortar. When the hydraulic gel (cement) hardens, the water inside the gel evaporates immediately, leaving a large number of capillary pores. Generally, large pores can It is blocked by adding fine aggregates, but the capillary pores cannot be blocked by ordinary fine aggregates, which directly leads to the decline in the impermeability of concrete and mortar, which is also the root cause of leakage in buildings. [0003] The traditional waterproof materials are mainly based on asphalt membrane and polypropylene membrane, and the purpose of waterproofing is achieved by covering the leaking surface. In the waterproof construction, the waterproof membrane needs to be tailored according to ...

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.