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首页> 外文期刊>International journal of sustainable engineering >Effect of cement content and recycled rubber particle size on the performance of rubber-modified concrete
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Effect of cement content and recycled rubber particle size on the performance of rubber-modified concrete

机译：水泥含量和再生橡胶粒径对橡胶改性混凝土性能的影响

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摘要

According to the Rubber Manufacturer's Association, the United States generated 3664 thousand metric tons of scrap tires in 2015. While most waste tires are repurposed, approximately 409.5 thousand metric tons were disposed in landfills. This study investigates an alternative use of the waste tires as a replacement of natural aggregates in concrete mixtures. This study investigated fresh concrete properties and compressive strength. Different coarse and fine aggregate rubber particle sizes were evaluated: 19-mm tire chips (TCs) and 30-mesh crumb rubber (CR). TCs were used to replace coarse aggregates, while CR was used to replace fine aggregate in the concrete mixtures in increments of 10% by volume. Concrete strength loss was reduced with a fine aggregate replacement with CR as opposed to greater losses of strength exhibited by a coarse aggregate replacement with TCs. Adequate strengths were achieved at replacement levels as high as 40% by volume with CR, whereas satisfactory strengths were achieved with only a 10% replacement of coarse aggregates with TCs. Acceptable strengths were obtained from mixtures utilizing a combination of the two rubber sizes. Cement content was observed to have greater influence on rubberized concrete compressive strength at lower rubber contents than higher levels.
机译：根据橡胶制造商协会的说法，美国在2015年生成了3664万公吨废旧轮胎。虽然大多数废物轮胎正在重新押，但在垃圾填埋场中设置了大约409.5万公吨。本研究调查了废气轮胎作为混凝土混合物中的自然聚集体的替代使用。本研究调查了新的混凝土性能和抗压强度。评估不同的粗细聚集橡胶粒径：19毫米轮胎芯片（TCS）和30目的橡胶（CR）。 TCS用于替代粗骨料，而CR用于以10％（体积）的增量以10％体内的混凝土混合物中的细聚集体。用CR的细聚集体替代减少了具体的强度损失，而不是通过用TCS粗骨料置换造成的强度损失。在替换水平下实现足够的强度，高达40％的体积与Cr，而令人满意的优点是达到令人满意的优点，只有10％的粗粒与TCS替代。可接受的优点是从使用两种橡胶尺寸的组合的混合物获得。观察到水泥含量对较高水平的橡胶混凝土抗压强度产生更大的影响。

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