碱硅酸反应-冻融循环下掺锂渣混凝土力学性能试验分析  

Experimental Analysis on Mechanical Properties of Concrete with Lithium Slag under ASR-FTC

作　　者：秦拥军[1] 毕钰 阳毅恒 陈奇 张亚斌 QIN Yongjun;BI Yu;YANG Yiheng;CHEN Qi;ZHANG Yabin(School of Civil Engineering and Architecture,Xinjiang University,Urumqi 830017,China)

机构地区：[1]新疆大学建筑工程学院,新疆乌鲁木齐830017

出　　处：《材料科学与工程学报》2024年第4期587-592,共6页Journal of Materials Science and Engineering

基　　金：国家自然科学基金项目(51668061)。

摘　　要：研究了掺锂渣混凝土在碱硅酸反应(ASR)和冻融循环(FTC)耦合作用下的抗折和抗压强度。研究结果表明,碱硅酸反应和冻融循环均会降低混凝土的抗压抗折强度,掺入一定量锂渣的混凝土后进行碱硅酸反应会使混凝土的抗折强度略微提高。混凝土抗压强度随冻融循环次数的增多而降低,且两种反应互相耦合。前期碱硅酸反应会加剧后期冻融破坏的影响,先进行冻融破坏同样会加剧后期碱硅酸反应造成的影响。混凝土的力学性能随锂渣掺量的增加,呈现先变优后变劣的趋势,锂渣掺量为20%时对混凝土力学性能的提升最为显著。Research is conducted on the mechanical properties of concrete mixed with lithium slag under the coupling effect of alkali-silica acid reaction(ASR)and freeze-thaw cycle(FTC),including its flexural strength and compressive strength.Alkali-silica acid reaction and freeze-thaw cycles will reduce the compressive and flexural strength of concrete.The alkali-silica acid reaction after adding a certain amount of lithium slag will slightly increase the flexural strength of concrete.The more the number of freeze-thaw cycles,the more the compressive and flexural strength decreases,and the two reactions promote each other.The early alkali-silica reaction will aggravate the influence of the later freeze-thaw damage,and the first freeze-thaw damage will also aggravate the influence of the later alkali-silica reaction.The test results show that the incorporation of lithium slag can effectively improve the mechanical properties of concrete,with lithium slag content of 20%best.

关 键 词：锂渣 碱硅酸反应 冻融循环 

分 类 号：TU528[建筑科学—建筑技术科学]