Waterproof additive for cement

Abstract

The invention relates to a waterproof additive for cement, wherein components comprise calcium lignin sulfonate, a FDN water reducer, stearic acid, fly ash, lime, calcium sulfate, aluminum sulfate, polyethylene amide, hydroxy carboxylate, and sodium fluorosilicate. According to the waterproof additive prepared by using the formula of the present invention, permeation resistance and leakage resistance are strong, such that the outer surface and the internal of the cement wall or ground becomes oil-based so as to significantly improve water resistance, permeation resistance and leakage resistance of the cement; and the waterproof additive has characteristics of low cost, convenient construction, aging resistance, and long service life, and can be widely used in roofs, kitchens, bathrooms, basements, outdoor walls, water reservoirs, tunnels, culverts, and other moisture-proof and waterproof projects of industrial and civil building.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a waterproof additive, in particular to a waterproof additive for cement. Background technique [0002] Cement is a basic building material with a wide range of applications. Its main uses include masonry, painting, tile bonding, making cement bricks, cement concrete, and cement products. In the prior art, the waterproof function of cement is enhanced by adding external additives to cement, such as the combination of glue products and cement to solve the waterproof problem, and once the waterproof layer reaches a certain limit after the use time, it will be destroyed due to thermal expansion and contraction , this function cannot repair it, and an irreparable defect occurs. [0003] In today's buildings, where cement is used, water leakage can be found at any time, and mold spots or peeling off will appear on the outer wall due to water leakage, and seepage will occur on the ce...

AI Technical Summary

Problems solved by technology

In the prior art, the waterproof function of cement is enhanced by adding external additives to cement, such as the combination of glue products and cement to solve the waterproof problem, and once the waterproof layer reaches a certain limit after the use time, it will be destroyed due to thermal expansion and contraction , this function cannot repair it, an irreparable defect occurs

[0003] In today's buildings, where cement is used, water leakage can be found at any time, and mold spots or peeling off will appear on the outer wall due to water leakage, and seepage will occur on the cement wall beside the indoor window frame. Water leakage, water will also seep from the mud surface to the residents on the next floor and affect their lives. Water seepage on the bathroom wall will bring moisture and mildew to the wardrobe, floor boards, floors, etc. of the family, which has seriously affected people's living security

The performance of cement itself has poor durability; the thermal expansion and contraction coefficient is large, and it is easy to crack and decompose; the high temperature resistance is poor, and it is easy to burst; the water resistance is poor; the puzzle