Gypsum built-in mould

Abstract

The invention discloses a gypsum built-in mould and a preparation method thereof. The gypsum built-in mould comprises gypsum powder, water, high-strength fibers and organosilicon waterproof powder. The waterproof ability of the gypsum built-in mould is realized by two ways: 1, the organosilicon waterproof powder is added into the raw materials of the gypsum built-in mould, thereby realizing the waterproof ability of the gypsum built-in mould; 2, a method of coating the surface of the gypsum built-in mould in a waterproof manner is adopted, i.e., a layer of organosilicon waterproofing agent solutions are coated on the surface of the molded and dried gypsum built-in mould, so that a waterproof layer is formed on the surface of the gypsum built-in mould, thereby realizing the waterproof ability of the gypsum built-in mould. The gypsum built-in mould has the strength and the waterproof performance, thereby being especially suitable for in-situ concrete hollow floors.

Description

technical field [0001] The invention relates to a gypsum built-in mold for cast-in-situ concrete hollow floors, in particular to components of the gypsum built-in mold and a preparation method thereof. Background technique [0002] The cast-in-place concrete hollow floor is one of the floor structures that have appeared in recent years. Most of its implementation methods are to arrange built-in molds in the floor to realize the one-time cast-in-place molding of the floor. Due to the large amount of use, its quality is stable Reliability and reliability are very important. At present, the built-in molds used in the market include gypsum boxes, thin-walled tubes, thin-walled boxes, and polymer alloy composite boxes. Among them, the gypsum built-in mold uses the by-product of phosphorus chemical industry, that is, phosphogypsum as the raw material for production, which has the advantages of environmental protection, low carbon and utilization of industrial waste, etc., and has...

AI Technical Summary

Problems solved by technology

However, since gypsum has the characteristics of water absorption, and the gypsum built-in molds currently on the market are basically not waterproof, so the gypsum built-in molds must be soaked in the construction process to prevent the gypsum built-in molds from absorbing the concrete when pouring concrete. moisture, thus affecting the molding quality of concrete

At the same time, the strength of the gypsum built-in mold will be greatly reduced after absorbing water, so that the breakage rate of the gypsum built-in mold will also increase

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