The oil shale can be used as construction materials, such as highgradecement filler, light concrete bone material-pottery grain and light brick materials, etc.
油页岩渣可用作建筑材料，如高档水泥填料、轻质混凝土骨料陶粒及轻质砖材料等；
2
Wipe the surface very thick, use high-gradecement mortar, high strength, this is wrong.
面层抹得很厚，用上高标号水泥，高强度砂浆，这就错了。
3
Cement water spraying of highway curb and roadside tree is very important in highgrade road maintenance engineering.