利用燃烧后的煤矸石渣作骨料，配制混凝土路面砖。
We can make concrete paves by using of burned coal gangue as coarse aggregate.
用废混凝土骨料完全代替粗骨料配制混凝土是可行的。
It is feasible to substitute the coarse aggregate concrete by waste concrete aggregate.
用废混凝土骨料完全代替粗骨料配制混凝土是可行的。
It is feasible to substitute the coarse aggregate concrete by wast...
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