摘要
为了考察持续荷载作用对锂渣混凝土气体渗透能力的影响,设计了水灰比为0.4、0.45、0.62,锂渣掺量为0、10%、20%,30%的混凝土,研究对锂渣混凝土试件施加极限荷载的10%、30%、50%的持续压应力下试件的气体渗透性能情况。利用Autoclam渗透性测试仪研究发现:随着龄期的增长,混凝土的透气性指数降低,密实度增大;当水灰比范围在0.45~0.62时,存在一个临界值使混凝土的气体渗透性急剧增大;当应力比大于0.3时,试件的气体渗透系数的增长趋势加大;在压应力阀值出现之前,掺入10%锂渣能够有效改善混凝土的渗透性。
In order to investigate the effect of continuous loading on the gas permeability of lithium slag concrete,it designed a concrete with a water-cement ratio of 0.4,0.45,0.62 and a lithium slag content of 0,10%,20%and 30%.The gas permeability of the test piece under continuous compressive stress of 10%,30%,and 50%of the ultimate load applied to the slag concrete specimen.Using the Autoclam permeability tester,it is found that as the age increases,the permeability index of concrete decreases and the compactness increases.When the water-cement ratio ranges from 0.45 to 0.62,there is a critical value that makes the gas permeability of the concrete sharp.When the stress ratio is greater than 0.3,the gas permeability coefficient of the test piece increases.When the compressive stress threshold occurs,the incorporation of 10%lithium slag can effectively improve the permeability of the concrete.
作者
马丽莎
温勇
马蕾
MA Lisha;WEN Yong;MA Lei(School of Architecture and Civil Engineering,Xinjiang University,Urumqi 830047,China)
出处
《混凝土》
CAS
北大核心
2020年第1期45-49,共5页
Concrete
基金
国家自然科学基金(51768068)
关键词
锂渣掺量
气体渗透性
应力比
透气性指数
lithium slag content
gas permeability
stress ratio
gas permeability index
作者简介
第一作者:马丽莎(1993-),女,硕士研究生,研究方向:土木工程材料。联系地址:新疆乌鲁木齐市延安路1230号新疆大学南校区建筑工程学院(830047),联系电话:18209915447;通讯作者:温勇(1975-),男,硕士,教授,研究方向:土木工程材料。联系电话:13999184327。
