Gypsum-based pre-mixed mortar and preparation method thereof

Abstract

The invention provides a gypsum-based ready-mixed mortar and a preparation method thereof. The ready-mixed mortar comprises 450-500 parts of hemihydrate gypsum, 550-600 parts of aggregate, 0.7-1.5 parts of compound modification additive, 0.2-1.0 part of foaming agent and 1-10 parts of setting retarder. The preparation method includes the following steps: mixing hemihydrate gypsum, aggregate, compound modification additive, foaming agent and retarder to obtain ready-mixed mortar. The gypsum-based ready-mixed mortar has strong adhesion to the substrate, which overcomes the shortcomings of easy cracking and hollowing in the use of traditional cement-based ready-mixed mortar; the one-time survival thickness is 4mm-2cm, which is smooth to the wall surface The requirements for the degree of strength are not high, and the construction requirements are greatly reduced; the hardening is fast, which can speed up the construction progress; the cost is low, and at the same time, it also has the advantages of good fire resistance, automatic temperature adjustment function, and light weight.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a gypsum-based ready-mixed mortar and a manufacturing method thereof. Background technique [0002] The traditional construction mortar production in our country is made by the construction unit on site, and its defects are increasingly revealed, such as unstable mortar quality, large waste of materials, single type of mortar, low degree of civilized construction, and large environmental pollution. Factors promote the development of ready-mixed mortar. [0003] Ready-mixed mortar is a new type of building material developed in recent years with the advancement of science and technology in the construction industry and the requirements of civilized construction. It has the advantages of high product quality, complete variety, high production efficiency, convenient use, little environmental pollution, and convenient civilized construction. Therefore, promoting the use of ready-m...

AI Technical Summary

Problems solved by technology

Aiming at the defects of existing cement-based ready-mixed mortar, such as high cost, easy shrinkage, hollowing, cracking, slow hardening, high requirements on base flatness, and long decoration time, the present invention provides a gypsum-based ready-mixed mortar, which Ready-mixed mortar is mainly composed of hemihydrate gypsum, aggregates and various additives. Through the joint action of each component, the gypsum-based ready-mixed mortar has a strong bond with the substrate, which overcomes the traditional cement-based ready-mixed mortar in the process of use. The existing shortcomings of easy cracking and hollowing; the one-time survival thickness is 4mm-2cm, which does not require high wall flatness, and the construction requirements are greatly reduced; fast hardening can speed up the construction progress; low cost, at the same time, it also has the advantages of Good fire performance, automatic temperature adjustment function, light weight and other advantages

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