地板石膏是天然二水石膏或天然硬石膏經900—1100℃的溫度煅燒后,再經粉磨而制得的一种气硬性胶凝材料。苏联、波兰、瑞士、奥地利等国家很早就用这种材料制造无縫地板和地面磚,以及踏步、窗台板等构件和其它一些建筑艺术零件,还用以配制建筑砂浆、混凝土。地板石膏的标号一般分为“100”、“150”和“200”三种。地板石膏不但具有一定的强度,而且耐水性好、耐磨性高。我們曾在試驗室用湖北应城二水石膏、山西太原粘土石膏与硬石膏和宁夏中卫二水石膏 Floor gypsum is a kind of gas-hardening cementitious material obtained by calcining natural dihydrate gypsum or natural anhydrite at a temperature of 900-1100°C and then grinding. Countries such as the Soviet Union, Poland, Switzerland, and Austria used this material very early to make seamless flooring and floor tiles, as well as treads, sills, and other components and other architectural art parts, as well as for building mortar and concrete. The number of floor plaster is generally divided into three types: “100”, “150” and “200”. Floor plaster not only has a certain strength, but also has good water resistance and high abrasion resistance. We used Hubei Yicheng dihydrate gypsum, Shanxi Taiyuan clay gypsum and anhydrite and Ningxia Zhongwei dihydrate gypsum in the laboratory.