橡胶再生混凝土物理力学性能研究

Research on Physical and Mechanical Properties of Rubberized Recycled Concrete

通过正交试验,研究了龄期、橡胶粒径及取代率、再生混凝土取代率及对橡胶再生混凝土物理力学性能的影响。试验结果表明:橡胶再生混凝土立方体抗压强度随龄期的增长而增大,14 d后强度增大趋势变缓;橡胶及再生混凝土两者取代率对橡胶混凝土基本物理力学性能影响明显,均随取代率的增加而下降;橡胶粒径对橡胶混凝土强度有一定影响但没有对应关系。通过对试验数据的回归分析,给出了橡胶再生混凝土立方体抗压强度与龄期的关系公式以及抗折强度与立方体抗压强度之间的建议关系公式。

Based on orthogonal experiments, the influence of the age, particle size of waste rubber, replacement rate of waste rubber and recycled concrete on physical and mechanical properties of rubberized recycled concrete （RRC）were researched. The results show that the compressive strength of RRC increase with the age increasing, but the trend is becoming slower after 14 d; the replacement rate of waste rubber and recycled concrete have great influence on physical and mechanical properties of RRC which reduce with the replacement rate increasing; the particle size of waste rubber has little influence on strength of RRC. Based on the data regression, the modified relationship between the compressive strength and age,and flexural strength of RRC are established.