层面对带裂纹碾压混凝土强度断裂参数影响  

Effect of interface to strength and fracture parameters of RCC with cracks

作　　者：张小刚[1] 王学志[2] 孙荣书[2] 黄志强[3] 

机构地区：[1]深圳大学土木工程学院 [2]辽宁工学院土木建筑系,锦州121001 [3]沈阳工业大学建筑工程学院,沈阳110023

出　　处：《深圳大学学报（理工版）》2007年第3期240-245,共6页Journal of Shenzhen University(Science and Engineering)

基　　金：国家自然科学基金资助项目(50179002);深圳市科技计划资助项目(QK200601);深圳大学科研启动资助项目(200603)

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%.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 ease of four hours＇ interval of interface and 10 mm fly ash cement mortar laid on interface.

关 键 词：碾压层面 等效强度 断裂韧度 宏观裂纹 碾压混凝土 

分 类 号：TV313[水利工程—水工结构工程] TU528.01[建筑科学—建筑技术科学]