Abstract

Info

Author(s):: YUAN Qun; FENG Ling-yun; CAO Hong-liang; SHI Chang-cheng; ZHANG Guo-cen; Henan Key Laboratory of Hydraulic Engineering Security Technology, Henan Provincial Water Conservancy Research Institute

Keywords:: rubber concrete; stress-strain curve; Poisson’s ratio; peak strain; secant modulus

Abstract:: For the purpose of research on the influence of rubber particle size and rubber quantity on peak stress, peak strain, secant modulus and Poisson’s ratio change rule of rubber concrete, a test was made to determine stress-strain curve with strain gauge of C25 ordinary concrete specimens of 100 mm×100 mm×300 mm, which were prepared with rubber powder of sixty mesh, rubber particles of 1-3 mm and 3-6 mm instead of fine aggregate. The results indicate that, compared with the reference concrete, peak stress, peak strain and secant modulus of rubber concrete are smaller and decreased with increment of rubber quantity, while the Poisson’s ratio of rubber concrete is higher than the reference concrete in early period and lower than the reference concrete in later period. The finer the rubber particle size is, the greater difference is. Generally, the research results indicate that there is a reasonable correlation between rubber particle size and rubber quantity.