橡胶改性对再生混凝土应力-应变性能的影响

Effect of Rubber Modification on Stress-Strain Performance of Recycled Concrete

摘要:

为研究橡胶改性对再生混凝土应力-应变性能的影响机制，以橡胶掺杂量作为变量，在高温环境中均匀加热再生混凝土至不同温度，测试再生混凝土高温后的应力-应变关系曲线，分析常温条件下的橡胶再生混凝土的强度、弹性形变和塑性形变性能。结果表明：再生混凝土的延展性随橡胶粉含量增加而增加；当橡胶粉含量（质量分数）为4%时，其强度、弹性形变和塑性形变的性能劣化最小；此外，添加橡胶粉使再生混凝土在高温下的爆裂性能有所改良。

Abstract:

In order to study the influence mechanism of rubber modification on the stress-strain performance of recycled concrete， this paper takes the amount of rubber doping content as a variable， uniformly heats recycled concrete to different temperatures in a high temperature environment， and tests the stress-strain relationship curve of recycled concrete after high temperature， to analyze the strength， elastic deformation and plastic deformation properties of rubber recycled concrete at room temperature. The results show that the ductility of recycled concrete increases with the increase of rubber powder content. When the content of rubber powder is 4%， the performance degradation of strength， elastic deformation and plastic deformation is minimal. In addition， the addition of rubber powder improves the burst performance of recycled concrete at high temperatures.