ballast concrete

• 石渣混凝土,石碴混凝土

ballast concrete的用法和样例：

例句

1. Based on screening and sampling, properties of trass and trass concrete in Ximeng area of Inner Mongolia was studied.
   摘要通过筛分选样，对内蒙古锡盟地区大量蕴藏的火山渣及火山渣混凝土进行了材料性能实验研究。