荷载与锂渣掺量对混凝土氯离子扩散性与气体渗透性的影响  

Effects of Continuous Loading and Content of Lithium Slag on Chloride Penetration Resistance of Concrete

作　　者：李宇航 温勇[1] 韩国旗 马丽莎[1] 郝恩泽 LI Yu-hang;WEN Yong;HAN Guo-qi;MA Li-sha;HAO En-ze(College of Civil Engineering and Architecture,Xinjiang University,Urumqi 830047,China;College of Civil Engineering,Kashi University,Kashi 844006,China)

机构地区：[1]新疆大学建筑工程学院,乌鲁木齐830047 [2]喀什大学土木工程学院,喀什844006

出　　处：《科学技术与工程》2023年第13期5693-5699,共7页Science Technology and Engineering

基　　金：国家自然科学基金(52168036);上海市工程结构安全重点实验室开放课题(2018-KF08);新疆维吾尔自治区天山青年计划(2018Q014);新疆维吾尔自治区自然科学基金(2021D01B04)。

摘　　要：为探讨不同压应力与锂渣掺量对混凝土氯离子电通量和气体渗透系数的影响,制作了3种不同水胶比、4种锂渣掺量的混凝土试件,并对试件分别施加极限压荷载的10%、30%、50%作为持续压应力,进行氯离子扩散性和气体渗透性试验。结果表明:混凝土的气体渗透系数、氯离子电通量与锂渣掺量、压应力比之间存在明显的相关性。氯离子电通量随着锂渣掺量的增加而减少,随着压应力比的增大而增大。气体渗透系数随着锂渣掺量的增加而增加,随着压应力比的增大而增大。综合考虑电通量与气体渗透系数,C20、C30、C40混凝土最优掺量分别为15%、20%、15%。To investigate the effects of different compressive stresses and lithium slag admixture on the chloride ion flux and gas permeability coefficient of concrete,concrete specimens with three different water-cement ratios and four lithium slag admixtures were fabricated,and 10%,30%and 50%of the ultimate compressive load were applied to the specimens as continuous compressive stresses for chloride ion diffusivity and gas permeability tests.The results show that there is a significant correlation between the gas permeability coefficient,chloride ion flux,lithium slag admixture and compressive stress ratio of the concrete.The chloride ion flux decreases with the increase of lithium slag admixture and increases with the increase of compressive stress ratio.The gas permeation coefficient increases with the increase of lithium slag doping,and increases with the increase of compressive stress ratio.Considering the electric flux and gas permeability coefficient,the optimum dosing of C20,C30 and C40 concrete is 15%,20%and 15%respectively.

关 键 词：荷载 锂渣掺量 氯离子扩散性 气体渗透系数 混凝土 

分 类 号：TU528[建筑科学—建筑技术科学]