Permeation crystallizing waterproof dry powder coating for concrete and preparation method

Abstract

The invention discloses a permeation crystallizing waterproof dry powder coating for concrete and a preparation method. The preparation method comprises the following steps of a, adding microcrystalline cellulose, bentonite, white alum and potassiam polyoxyethylene laurylether phosphate into water, mixing, grinding, and spray-drying, so as to obtain nanometer composite microspheres; b, mixing andstirring nanometer silicon micropowder, aluminum stearate, and a redispersible latex powder, so as to obtain the coated nanometer silicon micropowder; c, uniformly dispersing the nanometer composite microspheres, the coated nanometer silicon micropowder, a large-size mica powder, and methyl sodium silicate, so as to obtain the permeation crystallizing waterproof dry powder coating for the concrete. The preparation method has the beneficial effects that after the prepared permeation crystallizing waterproof dry powder coating is used, the permeation uniformity of the self-permeation material isgood, the crack crystals can be formed, the waterproof property is excellent, and the purpose of lasting waterproof property is realized; the repair function is realized on the strength and compactness of the concrete, and the slight cracks of the building elevations, underground tunnels and the like can be resisted.

Description

technical field [0001] The invention relates to the field of building materials, in particular to the preparation of waterproof coatings, in particular to a osmotic crystallization waterproof dry powder coating for concrete and a preparation method thereof. Background technique [0002] In the process of using concrete and mortar, water is mainly used as the mixing agent. When the hydraulic gel (cement) hardens, the water inside the gel evaporates immediately, leaving a large number of capillary pores. Large pores can generally be blocked by adding fine aggregates, but capillary pores cannot be blocked by general aggregates, which directly leads to a decrease in the impermeability of concrete and mortar. Therefore, existing building facades, underground roads, etc. all need to be waterproofed. The usual waterproof coating is used to block the capillary pores of concrete to achieve the purpose of anti-seepage, waterproof and moisture-proof. [0003] Initially, film-forming ...

AI Technical Summary

Problems solved by technology

[0008] It can be seen that the permeable crystalline waterproof material used for building concrete in the prior art is difficult to penetrate in the concrete micro-cracks due to the self-permeable material, and the penetration uniformity in the waterproof coating is poor, resulting in the existence of repair micro-cracks. And poor uniformity of waterproof effect