橡胶混凝土不同应变率下抗压性能试验研究

Experimental Study on Compressive Performances of Rubber Concrete under Different Strain Rate

对橡胶混凝土试件进行了不同应变速率下的压缩试验,系统研究了不同应变率和橡胶掺量对橡胶混凝土强度和变形特性的影响.结果表明,橡胶混凝土的抗压强度随应变率的增加而增加,当橡胶掺量较小时,抗压强度随应变率提高的幅度较大;随着橡胶掺量的增加,抗压强度提高的幅度逐渐减小.在试验研究的基础上给出了不同橡胶掺量下混凝土抗压强度与应变率之间的关系式.另外,研究还发现:橡胶混凝土的抗压峰值应变随橡胶掺量的增加而增加,最大增幅达16.97%,混凝土的应变变形性能得到明显改善.

Experiments on mechanical properties of crumb rubber concrete（CRC） subjected to various strain rates were carried out.The influence of the contents of rubber and the strain rates on the strength and deformation behaviors of CRC was studied.The results show that the compressive strength of CRC grows with the increase of the strain rates.As the strain rate increases,the strength of CRC with small content of rubber increases more markedly than that with the larger content.The numerical expression of the compressive strength under different strain rate is put forward compared with that of the static strength.The peak strain also grows with the increase of rubber contents,the maximum growth rate reaches to 16.97%,so the deformation performance of concrete is improved.