废弃混凝土掺合型再生混凝土的力学性能

发布时间：2018-05-25 15:39

本文选题：废弃混凝土 + 废弃混凝土掺合型再生混凝土　；参考：《华南理工大学学报(自然科学版)》2014年02期

【摘要】：针对当前再生混凝土工程应用所面临的再生骨料生产成本高昂和废弃混凝土利用率偏低的问题,提出将废弃混凝土经适当破碎和湿水后直接与新拌混凝土混合拌制工程用混凝土,制得一种新型的再生混凝土材料———废弃混凝土掺合型再生混凝土.拌制该再生混凝土所用废弃混凝土块的最大粒径可达50~80 mm,扩大了废弃混凝土在降低生产成本方面的优势,同时提高了废弃混凝土的利用率.对150、300 mm模数废弃混凝土掺合型再生混凝土试件以及废弃混凝土掺合型再生混凝土板的力学性能进行了研究.结果表明:废弃混凝土掺合型再生混凝土具有良好的力学性能,即使在废料掺量达到30%~40%时,其抗压强度、抗拉强度和弹性模量仍很接近相应强度等级的普通混凝土;废弃混凝土掺合型再生混凝土板的冲切承载力及破坏特征与普通混凝土板相近.
[Abstract]:In view of the problems of high production cost of recycled aggregate and low utilization ratio of waste concrete in the application of recycled concrete engineering at present, A new type of recycled concrete material, waste concrete mixed with recycled concrete, was prepared by mixing waste concrete with fresh concrete directly after proper crushing and wet water. The maximum particle size of the recycled concrete can reach 50 ~ 80mm, which expands the advantage of the waste concrete in reducing the production cost and improves the utilization ratio of the waste concrete. The mechanical properties of recycled concrete with 150300 mm modulus and recycled concrete slab with waste concrete were studied. The results show that the recycled concrete with waste concrete has good mechanical properties, even when the waste content reaches 30 ~ 40, its compressive strength, tensile strength and elastic modulus are still close to the ordinary concrete of corresponding strength grade. The punching capacity and failure characteristics of recycled concrete slab mixed with waste concrete are similar to those of ordinary concrete slab.
【作者单位】：同济大学土木工程学院;
【基金】：国家科技支撑计划项目(2008BAK48B00)
【分类号】：TU528

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