建筑石(shi)膏简介

建筑石(shi)(shi)(shi)(shi)膏(gao)，是二(er)水石(shi)(shi)(shi)(shi)膏(gao)在(zai)一定温度下加(jia)热(re)脱水，并磨细制(zhi)成的以β-半水石(shi)(shi)(shi)(shi)膏(gao)为(wei)(wei)主要组成的气硬性胶凝材料(liao)。广泛应用(yong)于各类(lei)石(shi)(shi)(shi)(shi)膏(gao)板、石(shi)(shi)(shi)(shi)膏(gao)砌块粉刷石(shi)(shi)(shi)(shi)膏(gao)、模型石(shi)(shi)(shi)(shi)膏(gao)等(deng)石(shi)(shi)(shi)(shi)膏(gao)制(zhi)品(pin)。生产β型半水石(shi)(shi)(shi)(shi)膏(gao)的原料(liao)主要为(wei)(wei)含硫酸(suan)钙的天然石(shi)(shi)(shi)(shi)膏(gao)（又称(cheng)生石(shi)(shi)(shi)(shi)膏(gao)）或含硫酸(suan)钙的化工副产品(pin)和磷石(shi)(shi)(shi)(shi)膏(gao)、氟石(shi)(shi)(shi)(shi)膏(gao)等(deng)废渣，其化学式为(wei)(wei)CaSO4.2H2O，也称(cheng)二(er)水石(shi)(shi)(shi)(shi)膏(gao)。将(jiang)二(er)水石(shi)(shi)(shi)(shi)膏(gao)在(zai)不同(tong)的温度下煅烧(shao)可(ke)得(de)到不同(tong)的石(shi)(shi)(shi)(shi)膏(gao)品(pin)种。如将(jiang)二(er)水石(shi)(shi)(shi)(shi)膏(gao)在(zai)107~170℃的干燥条件下加(jia)热(re)可(ke)得(de)建筑石(shi)(shi)(shi)(shi)膏(gao)。