关键词: 高性能混凝土;橡胶粉混凝土;应变率效应;韧性

Abstract: The uniaxial compression test of high performance rubber powder concrete(HCRC)was carried out on microcomputer controlled electro-hydraulic servo compression-testing machine,the effect of rubber contents and strain rates on the performance of HPRC was studied.The result of research shows that the peak stress and secant modulus of HPRC show strain rates strengthening effect, and with the rubber contents increase, the increased amplitude of peak strength and secant modulus decrease; the peak strain did not show the strain rates sensitivity, under the same strain rate, the greater the crumb rubber contents, the greater the peak strain; the connection of strain energy and the specimen failure mode is analyzed, strain energy specimen stored increases with the strain rate increasing.The failure mode of the specimen is more serious with brittle failure characteristics, after adding the rubber, the toughness of the concrete is improved,the specimen shows crack without dispersion characteristic.

Key words: high performance concrete;rubber poewder concrete;strain rate effect;toughness