干湿循环作用下混杂纤维混凝土抗硫酸盐侵蚀性能  

Resistance to Sulfate Attack of Hybrid Fiber Concrete Under Dry-Wet Cycles

作　　者：李艺[1] 张爽[1] 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2016年第6期895-898,903,共5页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51078065);教育部新世纪优秀人才支持计划项目(NCET-12-0107);中央高校基本科研业务费专项资金资助项目(N130401009);辽宁省高等学校优秀人才支持计划项目(LR2015024)

摘　　要：采用干湿循环法,研究了普通混凝土和混杂纤维混凝土标准立方体试块(150 mm×150 mm×150 mm)对面侵蚀,在800和6 000 mg/L两种硫酸钠侵蚀溶液质量浓度下,分别在侵蚀龄期为0,30,60,90,180,210 d的抗硫酸盐侵蚀性能.结果表明:当侵蚀龄期达210 d,侵蚀溶液质量浓度为800和6 000 mg/L时,普通混凝土抗压强度分别劣化了5.6%和10.0%,劈裂抗拉强度分别劣化了3.0%和5.1%;混杂纤维混凝土抗压强度分别劣化了4.0%和6.3%,劈裂抗拉强度分别劣化了0.51%和3.8%;侵蚀深度为1.5 mm时,普通混凝土的SO2-4质量分数分别为0.83%和1.03%,混杂纤维混凝土SO2-4质量分数分别为0.79%和1.00%.The dry-wet cycle method is adopted to study sulfate resistance of standard cubic plain concrete and hybrid fiber concrete specimens （ 150 mm x 150 mm x 150 mm）. The anti-sulfate corrosion performance is tested at the erosion age of 0, 30, 60, 90, 180, 210 days with sodium sulfate erosion solution concentrations of 800 and 6 000 mg/L. The results show that when the erosion age is 210 days, corresponding to concentrations of 800 and 6 000 mg/L, compressive strength of plain concrete decreases by 5.6% and 10.0% and splitting tensile strength decreases by 3.0% and 5. 1% respectively. Compressive strength of hybrid fiber concrete decreases by 4. 0% and 6. 3% and splitting tensile strength decreases by 0. 51% and 3.8% respectively. When erosion depth comes to 1.5 mm, SO42- concentrations of plain concrete are 0. 83% and 1.03% , while hybrid fiber concrete are 0.79% and 1.0% respectively.

关 键 词：混杂纤维混凝土 干湿循环 硫酸盐 抗压强度 劈裂抗拉强度 SO2-4质量分数 

分 类 号：TU528.572[建筑科学—建筑技术科学]