掺锂渣再生混凝土抗硫酸盐性能的试验研究  

Experimental study on sulfate resistance of lithium-doped slag recycled concrete

作　　者：秦拥军[1,2] 孟军 刘珂 罗玲 Qin Yongjun;Meng Jun;Liu Ke;Luo Ling(College of Architectural Engineering,Xinjiang University,Urumqi 830047,China;Xinjiang Civil Engineering Technology Research Center,Urumqi 830047,China)

机构地区：[1]新疆大学建筑工程学院,新疆乌鲁木齐830047 [2]新疆土木工程技术研究中心,新疆乌鲁木齐830047

出　　处：《建筑科学》2021年第7期88-93,130,共7页Building Science

基　　金：国家自然基金资助项目(51668061)。

摘　　要：为推进再生粗骨料混凝土在西部地区的有效利用,增大建筑废料的利用率,本试验对不同锂渣掺量以及不同再生粗骨料用量的再生粗骨料混凝土试件进行了西部硫酸盐环境下的干湿交替模拟,以清水环境下的干湿循环模拟为对照,分别进行了30、60、90、120次干湿循环,分析了在这种加速侵蚀作用下,各组掺锂渣再生混凝土试件的表观特征、力学性能及质量随侵蚀的经时变化规律。结果表明:适量的锂渣可以提高掺锂渣再生粗骨料抗硫酸盐侵蚀性能,20%锂渣掺量效果最好;20%锂渣掺量、30%再生粗骨料取代率混凝土试件抗压强度最大,较普通混凝土试件提高15%。In order to promote the effective utilization of recycled coarse aggregate concrete in the western region and increase the utilization rate of construction waste,in this experiment,30,60,90 and 120 dry and wet cycles are carried out in western sulfate environment for recycled coarse aggregate concrete specimens with different lithium slag content and different recycled coarse aggregate content.The apparent characteristics,mechanical properties and quality of each group of recycled concrete specimens with lithium slag are analyzed with erosion.The results show that the content of lithium slag can improve the corrosion resistance of coarse aggregate regenerated with lithium slag,the effect of 20%lithium slag content is the best,and the compressive strength of 20%lithium slag content and 30%recycled coarse aggregate replacement ratio concrete specimen is the largest,which is 15%higher than that of ordinary concrete specimen.

关 键 词：硫酸盐 干湿循环 锂渣 再生粗骨料 混凝土 

分 类 号：TU528[建筑科学—建筑技术科学]