Abstract

Info

Title:: Unified Calculation Method of Uniaxial Mechanical Performance Index of Recycled Concrete

Author(s):: DING Fa-xing; FANG Chang-jing; GONG Yong-zhi; YU Zhi-wu; HU Li-na; School of Civil Engineering, Central South University

Keywords:: recycled concrete; mechanical performance; substitution rate; stressstrain curve

Abstract:: Abundant literatures on the uniaxial tests and theoretical analysis of recycled concrete were studied. Based on the method of statistical analysis and the mechanical model of normal concrete, unified analysis of the mechanical performance index of recycled concrete with different substitution rates was conducted. The unified calculation formulae for recycled concrete cubic compressive strength, axial compressive strength, axial tensile strength, split tensile strength, elastic modulus, peak uniaxial compressive and tensile strains, as well as compressive and tensile stressstrain curves were proposed. The calculation results from formulae were contrasted to the test results. The results show that the calculation results agree with test results, and the proposed unified calculation formula for uniaxial mechanical performance index of recycled concrete has high precision.