Along with the increase of age, its fracture toughness grows, and the elevated range is in accordance with the natural aggregate concrete basically;
再生混凝土断裂韧度随龄期的增加而提高，提高的幅度与天然骨料混凝土基本一致，其趋势在增加；
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。
It can be used in various strength class of concrete structure, and its property has no obvious distinction with natural aggregate.
可用于各种强度等级的混凝土结构中，其性能与天然骨料没有显著区别。
In the experiment of recycled concrete aggregate, compared with natural aggregate and recycled aggregate, analyzed the basic properties of recycled aggregate, and also made the intensifying test.
再生骨料试验，通过再生骨料与天然骨料的对比，分析了再生骨料的基本性能，并对其进行了强化试验研究。
In the experiment of recycled concrete aggregate, compared with natural aggregate and recycled aggregate, analyzed the basic properties of recycled aggregate, and also made the intensifying test.
再生骨料试验，通过再生骨料与天然骨料的对比，分析了再生骨料的基本性能，并对其进行了强化试验研究。
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