东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (6): 895-899.DOI: 10.12068/j.issn.1005-3026.2016.06.028

• 资源与土木工程 • 上一篇    下一篇

干湿循环作用下混杂纤维混凝土抗硫酸盐侵蚀性能

李艺, 张爽   

  1. (东北大学 资源与土木工程学院, 辽宁 沈阳110819)
  • 收稿日期:2015-07-31 修回日期:2015-07-31 出版日期:2016-06-15 发布日期:2016-06-08
  • 通讯作者: 李艺
  • 作者简介:李艺(1972-),女,辽宁沈阳人,东北大学教授.
  • 基金资助:
    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).

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

LI Yi, ZHANG Shuang   

  1. School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China.
  • Received:2015-07-31 Revised:2015-07-31 Online:2016-06-15 Published:2016-06-08
  • Contact: LI Yi
  • About author:-
  • Supported by:
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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(150mm×150mm×150mm)对面侵蚀,在800和6000mg/L两种硫酸钠侵蚀溶液质量浓度下,分别在侵蚀龄期为0,30,60,90,180,210d的抗硫酸盐侵蚀性能.结果表明:当侵蚀龄期达210d,侵蚀溶液质量浓度为800和6000mg/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1.5mm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%.

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

Abstract: The dry-wet cycle method is adopted to study sulfate resistance of standard cubic plain concrete and hybrid fiber concrete specimens (150mm×150mm×150mm). 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 6000mg/L. The results show that when the erosion age is 210 days, corresponding to concentrations of 800 and 6000mg/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 1.5mm, SO2-4 concentrations of plain concrete are 0.83% and 1.03%, while hybrid fiber concrete are 0.79% and 1.0% respectively.

Key words: hybrid fiber concrete, dry-wet cycle, sulfate, compressive strength, splitting tensile strength, SO2-4 concentration

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