橡胶集料掺量对混凝土弯曲性能的影响及评价方法研究  

Effect of Crumb Rubber Proportion on Flexural Behavior of Concrete and Evaluation Methodology

作　　者：周梅[1,2] 朱涵[2] 刘春生[2] 张世越[2] 

机构地区：[1]辽宁工程技术大学建筑与工程学院,阜新123000 [2]天津大学建筑工程学院,天津300072

出　　处：《硅酸盐通报》2009年第2期264-268,共5页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金资助项目(50478087)

摘　　要：通过6组18根橡胶集料混凝土小梁的四点加荷试验,研究了橡胶集料体积率对混凝土弯曲性能的影响,提出采用应变能作为材料吸收能量的度量指标,来评价橡胶集料混凝土的弯曲性能。试验结果表明,随着橡胶集料掺量的增加,混凝土的抗折强度逐渐减小,吸收塑性应变能的能力逐渐增大,抗弯极限拉伸值明显增大,且试件表现出明显的延性破坏特征。当橡胶集料体积率达到15%时,与基体相比抗折强度下降28.5%、应变能增大10.66倍、极限拉应变增大4.21倍。The influence of crumb rubber volume fraction on concrete bending properties through four- point loading test using 6 group 18 small-sized rubber concrete beams was studied. The strain energy is used as a measure of energy absorption material indicators to evaluate the rubber aggregate concrete bending performance. Test results show that with the amount of rubber aggregate increasing the bending strength of concrete decreases, absorption capacity of plastic strain energy increase gradually, and the limit bending stretching value increases. The sample shows the characteristics of the ductile damage. When the rubber aggregate volume rate was 15%, the bending strength decreased 28. increased 10.66 times,the ultimate strain increased 4.21 times compared with the matrix.

关 键 词：橡胶集料 混凝土 弯曲韧性 应变能 极限拉应变 

分 类 号：TU757[建筑科学—建筑技术科学]