Using cracked brick as coarse aggregate in concrete can reduce pollution and decrease the usage of naturalaggregate.
将碎砖作为混凝土的粗骨料，能够减少污染和减少天然骨料的使用。
2
In this paper, the concrete adding by sewer sludge by replacing of naturalaggregate was prepared.
本文研究了以管沟污泥等量替代天然细集料制备水泥混凝土。
3
The combined effect of natural zeolite and fly ash on alkali-silica reaction (ASR) of concrete was studied with natural alkali-reactive aggregate and quartz glass aggregate respectively.