| 硅灰橡胶集料混凝土力学性能试验研究 |
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| 引用本文： | 柳颖臣,;邓海斌,;王海龙,;吴坚荣.硅灰橡胶集料混凝土力学性能试验研究[J].金华职业技术学院学报,2014(3):55-58. |
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| 作者姓名： | 柳颖臣 ;邓海斌 ;王海龙 ;吴坚荣 |
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| 作者单位： | [1]湖州市公路管理局,浙江湖州313000; [2]浙江大学建筑工程学院,浙江杭州310058 |
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| 摘 要： | 探讨将具有良好弹性和柔韧性的废旧轮胎橡胶作为粗、细骨料,掺入混凝土进行材料改性、以及利用硅灰进行材料性能提升的可行性。试验研究结果表明:轮胎橡胶颗粒替代砂石骨料掺入混凝土后,其抗压强度、抗折强度以及弹性模量均随着轮胎橡胶骨料含量的增加而降低。粗橡胶颗粒对于强度的削弱要明显大于细橡胶粉。但是,当粗橡胶颗粒掺量不超过10%,细橡胶粉掺量不超过25%时,改性后混凝土力学性能没有太大的降低。而且在此掺量下,掺入少量的硅灰,就可以大大提升橡胶集料混凝土的力学性能,使其强度接近或超过普通混凝土。与普通混凝土相比,橡胶混凝土破坏过程柔和缓慢,特别是细橡胶集料混凝土具有更好的韧性。
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| 关 键 词： | 轮胎橡胶骨料 混凝土 强度 力学性能 |
Experimental Study of Silica Fume Rubber Aggregate Concrete Mechanical Performances |
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| Institution: | LIU Ying-chen, DENG Hai-bin, WANG Hai-long, WU Jian-rong ( 1. Huzhou Highway Administration, Huzhou 313000, China. 2. Zhejiang University, Hangzhou 310058, China) |
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| Abstract: | The feasibility of using elastic and flexible waste tire rubber particles as aggregates in concrete and using silica fume to promote the performance of rubber aggregate concrete was extensively investigated in this study. The experimental results show that the compressive strength, the tensile strength, and the elastic modulus of concretes decrease with the increasing use of rubber tire particles in concrete. Furthermore, the size of rubber particle has an important effect on the mechanical performance of concrete. When the replace ratio of coarse rubber particles is no more than 10% and the replace ratio of fine rubber particles is no more than 25%, the mechanical properties of rubber aggregate concrete are close to that of plain concrete. In these replacing fractions, mixing silica fume can improve significantly the performance of rubber aggregate concrete, in which the strength of modified rubber aggregate concrete approaches to or are higher than that of plain concrete. Unlike plain concrete, the failure state in rubber aggregate concrete occurs gently and uniformly. The failure mode show that the toughness of rubber particles modified concrete is better than that of plain concrete. |
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| Keywords: | tire-rubber aggregate concrete strength mechanical performances |
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