Surface layer grinding gypsum powder

Abstract

The invention discloses surface layer grinding gypsum powder, belonging to building materials and solving the problems that cement is high in production energy consumption and has high usage amount when serving as the building construction material, so that the usable area can be reduced. The surface layer grinding gypsum powder comprises the following components in parts by weight: 30-75 parts of semi-hydrated gypsum powder, 10-40 parts of anhydrous gypsum powder, 0.1-2 parts of polyvinyl alcohol (PVA), 0.5-2 parts of carboxymethyl cellulose (CMC) and 0.1-0.5 part of methyl cellulose (MC). When the surface layer grinding gypsum powder is made, after being ground, the components are mixed and stirred for 10-60 minutes or undergo secondary stirring, thus obtaining the surface layer grinding gypsum powder. The surface layer grinding gypsum powder is low in energy consumption and simple in preparation method, is safe and harmless and has a wide application range.

Description

technical field [0001] The invention belongs to building materials, and in particular relates to a construction material suitable for the surface layer of the inner and outer walls after the main body of the building is completed, in particular to a crushed gypsum powder for the surface layer. Background technique [0002] At present, cement mortar is generally used as wall material in the construction industry. During construction, a thick layer of cement mortar is applied on the brick wall to ensure the smoothness of the wall surface. According to statistics, my country's cement output in 2013 was 2.42 billion tons per year, equivalent to more than the sum of other countries. After the ban on solid clay bricks, cement increased by 1.7 billion tons during the ten-year period from 2003 to 2013. However, cement is a high-temperature calcined material that needs to be calcined at a temperature of more than 1400 degrees, so the energy consumption of cement production is very la...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem of high energy consumption in cement production, and when it is used as a building construction material, the use amount will be large, which will reduce the use area. It provides surface layer crushed gypsum powder