掺锂渣再生粗骨料混凝土断裂能试验研究  

Experimental study on fracture energy of recycled coarse aggregate concrete mixed with lithium slag

作　　者：蔺鹏杰 于江[2] 秦拥军[2] LIN Pengjie;YU Jiang;QIN Yongjun(School of Civil Engineering,Xinjiang Institute of Engineering,Urumqi 830023,China;School of Civil Engineering and Architectural,Xinjiang University,Urumqi 830047,China)

机构地区：[1]新疆工程学院土木工程学院,新疆乌鲁木齐830023 [2]新疆大学建筑工程学院,新疆乌鲁木齐830047

出　　处：《混凝土》2023年第10期126-128,132,共4页Concrete

基　　金：国家自然科学基金项目(51668060,51668061);新疆工程学院科研育人项目(2019xgy812112)。

摘　　要：为研究锂渣掺量、再生粗骨料取代率和初始缝高比对混凝土断裂能的影响,制作了144个掺锂渣再生混凝土三点弯曲梁试件,试验获得各组试件的荷载-跨中位移曲线,计算其断裂能进行分析。试验结果表明:混凝土中掺入锂渣没有改善混凝土断裂能的效果,再生粗骨料适量替代卵石可以提高混凝土断裂能,因此随再生粗骨料取代率增加混凝土断裂能先增大后减小。随初始缝高比的增大,掺锂渣再生粗骨料混凝土的断裂能逐渐减小。In order to study the effects of lithium slag content,recycled coarse aggregate replacement rate and initial joint height ratio on the fracture energy of concrete,144 three-point bending beam specimens of recycled concrete mixed with lithium slag were made.The load mid-span displacement curves of each group of specimens were obtained,and their fracture energy was calculated and analyzed.The test results show that the addition of lithium slag in concrete does not improve the fracture energy of concrete,and the appropriate replacement of pebbles with recycled coarse aggregate can improve the fracture energy of concrete.Therefore,with the increase of the replacement rate of recycled coarse aggregate,the fracture energy of concrete increases first and then decreases.With the increase of the initial joint height ratio,the fracture energy of recycled coarse aggregate concrete mixed with lithium slag decreases gradually.

关 键 词：锂渣 再生混凝土 初始缝高比 断裂能 

分 类 号：TU528.041[建筑科学—建筑技术科学]