苏联用粒状矿渣代替砂制水泥瓦,水泥与矿渣之比为1:5。用于制瓦的矿渣的化学成分如下:43～45% CaO;35～36% SiO_2;11～12% Al_2O_3;0.4～0.6% Fe_2O_3%:3～4% MgO;2～3% SO_3。矿渣用转子-锺式破碎机破碎到3毫米以下(0.2毫米以下的粒子最好占26～30%)。制好的水泥-矿渣瓦用蒸汽养护,蒸汽养护制度为升温2小时,恒温8小时,降温2小时。蒸汽养护后瓦的抗断强度为90公 The Soviet Union used granular slag instead of sand cement watts. The ratio of cement to slag was 1:5. The chemical composition of the slag used for tile making is as follows: 43 to 45% CaO; 35 to 36% SiO2; 11 to 12% Al_2O_3; 0.4 to 0.6% Fe_2O_3%: 3 to 4% MgO; 2 to 3% SO_3. The slag is crushed to less than 3 mm by a rotor- jaw crusher (particles below 0.2 mm preferably account for 26 to 30%). The prepared cement-slag tile was steam-cured. The steam curing system was heated for 2 hours, heated for 8 hours, and cooled for 2 hours. After the steam curing, the breaking strength of the tile is 90