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首页> 外文会议>RILEM Proceedings PRO 40; International RILEM Conference on the Use of Recycled Materials in Buildings and Structures vol.2; 20041108-11; Barcelona(ES) >SELF-COMPACTING CONCRETE: A GREAT OPPORTUNITY FOR RECYCLING MATERIALS
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SELF-COMPACTING CONCRETE: A GREAT OPPORTUNITY FOR RECYCLING MATERIALS

机译：自填充混凝土：回收材料的绝佳机会

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摘要

In general, for self-compacting concrete production a high volume of very fine materials is necessary in order to make the concrete more fluid and cohesive. For this purpose, either rubble powder (which is a powder obtained from suitable treatment of rubble from building demolition) or ash from municipal solid waste incineration was used as mineral addition, in order to ensure adequate rheological properties of the self-compacting concrete in the absence of any viscosity modifying admixture. Recycled instead of natural aggregates were used by completely substituting the coarse aggregate fraction. The fresh concrete properties were evaluated through the slump flow, the V-funnel and the L-box test. Compressive strength and segregation resistance were also determined. The results obtained showed that self-compacting concrete could be successfully developed by incorporating both recycled aggregates and waste powders with an improved quality of the concrete surface finishing. This encouraging goal, beyond technical performance, matches with the more and more widely accepted sustainable development issues.
机译：通常，对于自密实的混凝土生产，需要大量的非常精细的材料，以使混凝土更具流动性和粘结性。为此，为了确保自密实混凝土在混凝土中的足够的流变性能，可以使用碎石粉（通过对建筑物拆除后的碎石进行适当处理获得的粉末）或城市固体垃圾焚烧产生的灰分作为矿物添加物。没有任何粘度调节剂。通过完全替代粗骨料部分，使用了回收的天然骨料。通过坍落度流，V型漏斗和L型箱试验评估了新鲜混凝土的性能。还确定了抗压强度和抗偏析性。所得结果表明，通过掺入再生骨料和废粉，可以提高混凝土表面光洁度，从而成功开发出自密实混凝土。除技术性能外，这一令人鼓舞的目标还与越来越广泛接受的可持续发展问题相吻合。

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