冻融-酸雨耦合作用对铁尾矿砂混凝土耐久性的影响  

Coupling effect of freeze-thaw-acid rain on durability of iron tailings concrete

作　　者：张信龙 顾晓薇[2] 刘庆东[1] 陈勇[1] 张玉琢 王全[1] ZHANG Xinlong;GU Xiaowei;LIU Qingdong;CHEN Yong;ZHANG Yuzhuo;WANG Quan(China Northeast Architectural Design&Research Institute Co.,Ltd.,Shenyang 110000,China;Science and Technology Innovation Center of Smart Water and Resource Environment,Northeastern University,Shenyang 110100,China;College of Civil Engineering,Shenyang Jianzhu University,Shenyang 110168,China)

机构地区：[1]中国建筑东北设计研究院有限公司,辽宁沈阳110000 [2]东北大学智慧水利与资源环境科技创新中心,辽宁沈阳110000 [3]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《混凝土》2021年第1期107-109,114,共4页Concrete

基　　金：十三五国家重点研发计划(2019YFC1907202);辽宁省重大科技专项(2020JH1/10300005)。

摘　　要：针对铁尾矿砂混凝土在寒冷地区的应用,通过冻融-酸雨侵蚀试验,研究该类在冻融-酸雨耦合条件下的耐久性。分析不同取代率下铁尾矿砂混凝土的质量损失率、动弹性模量、立方体抗压强度以及碳化深度的变化规律。试验结果表明,铁尾矿砂混凝土质量损失、动弹性模量、抗压强度算是及中性化深度随取代率的增大而增大。影响程度表现为rtwk=100%>rtwk=75%>rtwk=50%>rtwk=25%>rtwk=0。According to the application of iron tailings concrete in cold areas,the durability of this kind of concrete under the coupling conditions of freeze-thaw-acid rain is studied by experiment research.The mass loss rate,dynamic elastic modulus,cube compressive strength and the carbonation depth of concrete with different replacement ratio have been analyzed.The results showed that with the increasing of replacement ratio,mass loss rate,dynamic elastic modulus,cube compressive strength and carbonation depth of concrete increases.The effects are arranged according to replacement ratio,i.e.rtwk=100%>rtwk=75%>rtwk=50%>rtwk=25%>rtwk=0.

关 键 词：冻融 酸雨 耦合作用 铁尾矿砂混凝土 耐久性 

分 类 号：TU528.041[建筑科学—建筑技术科学]