【摘要】 研究层面对带裂纹碾压混凝土强度和断裂参数的影响,发现层面存在使等效强度随削弱度增大递减.单缝和双缝的削弱度分别为0.1、0.2和0.3时,其等效强度分别降低了13.37%、37.44%、46.96%和16.52%、25.46%、19.99%,表明层面对等效强度影响随削弱度的增加而加大,层面对单缝的影响比其对双缝的影响大.由于层面存在,层面间隔4h,层面不作处理时,碾压混凝土断裂韧度降低了17.85%;层面间隔4h,层面处理方式为铺10mm的粉煤灰水泥砂浆时,断裂韧度降低5.67%.更多还原

【Abstract】 The study discussed the effect of interface on the strength and fracture parameters of the RCC with cracks. The results show that the interface caused the decrease of equivalent strength with the increas of weakened degrees.The equivalent strengths of single saw specimens with weakened degrees of 0.1,0.2 and 0.3 decrease 13.37%,37.44% and 46.96%,and those of double saw specimens with the same weakened degrees decrease 16.52%,25.46% and 19.99%, respectively.It indicates that the influence of interface on the equivalent strength become greater with the increasing of weakened degrees,and the effects of interface on the single saw specimens are bigger than those of double saw specimens.Because there is an interface,fracture toughness of the rolled compacted concrete(RCC) decreases 17.85% in the case of four hours’ interval of interface and nonfreatmeat and 5.67% in the case of four hours’ interval of interface and 10 mm fly ash cement mortar laid on interface.更多还原