Waterproof Performance of Gypsum Products
A novel compound gypsum waterproof agent made of emulsified stearic acid, alunite and naphthalene were studied, which could modify the waterproof performance of gypsum materials in microstructures. The experiment results showed that the water-absorption rate of gypsum materials can be reduced to 3.73% and that the compressive strength reserve rate was 84.71% after 24h. The waterproof mechanic of alunite is the hydration materials of alunite can fill the materials’ porosities, which can no longer be filled with water, so it reduces the water absorption and improves the strength; The waterproof mechanic of stearic acid emulsion is that it improves the gypsum material surface performance and makes the surface performance convent from hydrophilic performance to hydrophobic performance.
Zhong Cao, Xueqiang Cao, Lixian Sun, Yinghe He
J. Q. Li et al., "Waterproof Performance of Gypsum Products", Advanced Materials Research, Vols. 239-242, pp. 600-603, 2011