碾压再生混凝土断裂性能试验研究  

Experimental study on fracture performance of roller compacted recycled concrete

作　　者：贾艳东[1] 郭小宝[1] 王学志[1] 赵辛[1] 

机构地区：[1]辽宁工业大学土木建筑工程学院,辽宁锦州121001

出　　处：《四川建筑科学研究》2011年第5期202-205,共4页Sichuan Building Science

基　　金：国家自然科学基金资助项目(50709013)

摘　　要：对碾压再生混凝土和普通再生混凝土进行楔入劈拉试验,计算比较了不同再生粗骨料掺量的碾压再生混凝土和普通再生混凝土的断裂韧度、断裂能和尖端开口位移,并与普通混凝土进行比较。初步研究表明:碾压对再生混凝土的断裂性能有明显影响5,0%再生粗骨料掺量的碾压再生混凝土的断裂韧度KIC和断裂能GF均比50%再生粗骨料掺量的普通再生混凝土的断裂韧度KIC和断裂能GF有所提高。与普通混凝土相比,再生混凝土延性增强,断裂能GF提高,但尚须进一步验证。The specimens of common recycled concrete and roller compacted recycled concrete were tested through wedge-split tensile method.The paper calculates and compares the fracture toughness,the fracture energy and crack tip opening displacement of common recycled concrete and roller compacted recycled concrete with different recycled coarse aggregate contents.Research shows that rolling has an obvious influence on the fracture performance of recycled concrete,the fracture toughness（KIC） and the fracture energy（GF） of roller compacted recycled concrete with 50% recycled coarse aggregate contents are higher than those of common recycled concrete with 50% recycled coarse aggregate contents.If compared with the ductility and the fracture energy of common concrete,those of recycled concrete enhances.

关 键 词：碾压再生混凝土 断裂韧度 断裂能 

分 类 号：TU528[建筑科学—建筑技术科学]