| 摘要: |
| 研究了振捣密实混凝土和自密实混凝土抗压强度随（废旧轮胎）橡胶集料体积分数的变化规律，分析了橡胶集料对混凝土抗压强度的降低效应，建立了混凝土抗压强度降低率与橡胶集料体积分数之间的经验关系式.结果表明：橡胶集料的掺加导致了混凝土抗压强度降低，橡胶集料体积分数越大，混凝土抗压强度降低越多；橡胶集料体积分数相同时，振捣密实混凝土抗压强度降低率比自密实混凝土抗压强度降低率稍大；一定体积分数橡胶集料对混凝土抗压强度的降低效应与相同体积分数气孔的降低效应相当；建议混凝土中每增加1%体积分数的橡胶集料，混凝土抗压强度降低率按4.5%计算. |
| 关键词: 橡胶集料 混凝土 抗压强度 降低效应 |
| DOI：10.3969/j.issn.1007 9629.2013.05.004 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（51178467）；国家重点基础研究发展计划（973计划）项目（2013CB036201）;教育部新世纪优秀人才支持计划项目（NCET 10 0839） |
|
| Effect of Rubber Aggregate on Reduction ofCompressive Strength of Concrete |
|
LONG Guang cheng1, MA Kun lin1, XIE Xu2, XIE You jun1
|
|
1.School of Civil Engineering, Central South University, Changsha 410075, China;2.Civil and Mechanical Engineering Building,University of British Columbia, Vancouver, B.C. Canada V6T 1Z4
|
| Abstract: |
| Serials experiments were designed to study the effect of rubber aggregate(waste tyre) on compressive strength of normally vibrated concrete and self compacting concrete.The experiential relationship between the reduction rate of compressive strength of concrete and the volume fraction of rubber aggregate was established. Results indicate that addition of rubber aggregate remarkably reduces the compressive strength of concrete. The more the volume fraction of rubber aggregate in concrete is, the higher the reduction rate of compressive strength of concrete is. The reduction rate of compressive strength of normally vibrated concrete is slightly higher than that of self compacting concrete with the same volume fraction of rubber aggregate. The effect of rubber aggregate on reduction of compressive strength of concrete is about the same as that of air pore with the same volume fraction of rubber aggregate. The reduction rate of compressive strength of concrete is 4.5% by addition of rubber aggregate of 1% volume fraction, which can be used as reference to design mix proportion. |
| Key words: rubber aggregate concrete compressive strength reduction efficiency |
