Change of Structure and Strength of Gypsum at Adding Disperse Mineral Additives

《Research Journal of Applied Sciences, Engineering and Technology》 12卷1期 (2016/01) Pp. 86-93

並列摘要

The article provides a study of the effect of dispersed mineral additives (quartz sand, diopside, glass and limestone powder) added in an amount of from 1 to 80% by weight of the gypsum, the mechanical strength of gypsum. Of great importance for increasing the dispersion’ strength is the amount of introduced additives. The optimum concentration of additives will be achieved when its particle on all sides by tightly surrounded by binder particles. Minimal amount of additives leads to their reduced effectiveness. With more, their contents are possible direct contacts between the particles of additives, which also reduce the effectiveness of their influence. It is shown that the introduction of the optimum amount of additives strengthens the structure of gypsum, which is manifested in the displacement endoeffect thermograms at higher temperatures. The micro-reinforcing of gypsum stone by additives having high hardness (quartz, glass), enhances its strength in compression by 50-60%.

並列關鍵字

Diopside ； gypsum ； limestone dust ； mechanical strength and minerals ； micro-reinforcing ； quartz ； quartz sand