Peak Strain Calculation Equation of Recycled Aggregate Concrete

摘要

Peak strain of concrete is an important mechanical parameter. Previous studies have found that the peak strain of recycled aggregate concrete (RAC) is significantly different with natural aggregate concrete (NAC). This paper collected peak strain test data of domestic and foreign scholars and derived the calculation equation of RAC peak strain by using the method of modifying the NAC peak strain equation. The new calculation equation involved the parameter of recycled aggregate (RA) replacement ratio and could be suited for both RAC and NAC. The calculation results show that the new equation's calculated value has a high degree of similarity with the test data. The results of this study can provide a reference value for the recycled aggregate concrete application in structure engineering.