... 天然基础：direct foundation 天然混凝土骨料：natural concrete aggregate 天然混合集料：all in aggregate ...
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Using cracked brick as coarse aggregate in concrete can reduce pollution and decrease the usage of natural aggregate.
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。
In this paper, the concrete adding by sewer sludge by replacing of natural aggregate 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。
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.
用天然活性骨料和石英玻璃骨料研究了粉煤灰与沸石的复合对碱-硅酸反应(asr)的影响。
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