The Preparation of Desulfurization Gypsum-based Lightweight Insulation Board

摘要

In this paper, desulfurization gypsum was made of cementing materials and expanded perlite as light aggregate, by adding the right amount of fly ash and other admixture, in the pouring forming preparation of desulfurization gypsum heat preservation material. Expanded perlite is porous surface, made its hydrophobic, lower water absorption, by emulsion coated surface of expanded perlite. In the waterproof property research, different emulsion composite waterproof contents on the influence of the bibulous rate of the product volumetric had been studied, and emulsion composite waterproof agent was chosen as the last agent with the dosage of 4%. SEM test for analyzing the microcosmic structure of desulfurization gypsum products were taken to research and analyze each combination, and discuss the waterproof and thermal insulation mechanism. The optimal parameters of the desulfurization gypsum of insulation products obtained by the experiments were: desulfurization gypsum of 90%, fly ash of 10%, and fiber of 0.5%, emulsion composite waterproof agent of 4%.