| 不同侵蚀溶液耦合冻融作用下混凝土力学性能差异 |
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| 引用本文： | 张健,刁波,袭杰,李艳东.不同侵蚀溶液耦合冻融作用下混凝土力学性能差异[J].混凝土,2012(3):4-7,14. |
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| 作者姓名： | 张健 刁波 袭杰 李艳东 |
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| 作者单位： | 北京航空航天大学土木工程系;华南理工大学亚热带建筑科学国家重点实验室 |
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| 基金项目： | 国家自然科学基金(51078015);北京市自然科学基金(8092020);华南理工大学亚热带建筑科学国家重点实验室重点课题资助 |
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| 摘 要： | 以清水、质量分数为5%的硫酸钠溶液、5%硫酸钠+3%氯化钠的混合溶液为侵蚀介质,采用慢冻法及干湿交替环境,对强度为54.71 MPa、水胶比为0.4的高强混凝土进行0、100、200、300次冻融循环,观察各组试件表面剥蚀情况,测定质量损失和抗压强度。试验结果表明:随着冻融循环及侵蚀次数增加,混凝土试块表面剥蚀趋于严重,质量损失率增加,抗压强度减小。侵蚀介质为5%硫酸钠+3%氯化钠溶液的混凝土试件,各参数的变化幅度最大。
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| 关 键 词： | 混凝土 慢冻法 冻融循环 溶液侵蚀 抗冻耐久性 |
Mechanical properties of concrete under different erosion and freeze-thaw cycling |
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| ZHANG Jian,DIAO Bo,XI Jie,LI Yan-dong.Mechanical properties of concrete under different erosion and freeze-thaw cycling[J].Concrete,2012(3):4-7,14. |
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| Authors: | ZHANG Jian DIAO Bo XI Jie LI Yan-dong |
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| Affiliation: | 1,2(1.Department of Civil Engineering,Beihang University,Beijing 100191,China; 2.State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510641,China) |
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| Abstract: | The mechanical properties of high strength concrete(54.71 MPa at 28 days of age) whose water-cement ratio was 0.4 were experimentally investigated under different erosion and freeze-thaw cycling.Three kinds of erosion solutions were water,solution by weight of 5% sodium sulfate and solution mixed by weight of 3% sodium chloride and 5% sodium sulfate,respectively.The surface scaled was observed,mass loss and compressive strength of specimens were measured as well.Results showed that,with the increase of freeze-thaw cycles,the surface scaled more seriously,the mass loss rate increased and the compressive strength decreased.The parameters of specimens thawed in mixed solution of 3% sodium chloride and 5% sodium sulfate changed most obviously. |
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| Keywords: | concrete slow freeze-thaw method freeze-thaw cycles erosion frost resistance |
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