含氯盐钢筋混凝土内部pH值及Cl-质量分数的分布
Assessment on pH Value and Cl- Concentration inside Reinforced Concrete Containing Chlorate
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- DOI:
- 作者:
- 杨怀宇1, 兰云飞2
YANG Huai-yu1, LAN Yun-fei2
- 作者单位:
- 1. 中国石油管道学院;
2. 中国石油天然气管道工程有限公司
China Petroleum Pipeline Institute,Langfang 065000,China
- 关键词:
- 钢筋混凝土;氯盐;pH值;Cl-质量分数;分布规律
reinforced concrete;chlorate;pH value;Cl- mass concentration;distribution law
- 摘要:
- 研究了4种掺入2%氯盐的钢筋混凝土内部离钢筋表面不同深度处的pH值和Cl-质量分数的分布规律。结果表明:内掺氯盐的混凝土中分别掺入粉煤灰、硅灰、引气剂和Ca(NO2)2时,离钢筋表面不同深度处的pH值和Cl-质量分数均会有所降低,但是pH值仍然在12以上;内掺氯盐的混凝土内部,离钢筋表面越近,其pH值和Cl-质量分数越大,这说明了OH-和Cl-有向钢筋表面渗透迁移的趋势。
Distribution of pH values and Cl- mass concentrations at different depths from the reinforcing steel bars inside four kinds of reinforced concretes containing 2% chlorate are studied. The results show that if the concrete contains mixed fly-ash, silicon ash, air-entraining agent and Ca (NO2 )2, the pH values and Cl- mass concentrations at different depths from reinforcing steel bars will decrease, yet the pH values are still above 12; the pH values and Cl- mass concentrations inside the reinforced concretes containing chlorate are higher when the depths from reinforcing steel bars are less, this indicates that OH- and Cl- have the infiltrating and transporting trend to bar surface.2009,S2(S2): 105-107 收稿日期:2009-8-1分类号:TU528.33作者简介:杨怀宇(1983-),女,吉林公主岭人,助教师,2009 年毕业于西南石油大学工程管理专业,现在中国石油管道学院管道工程系任教参考文献:
[1] 王琼,施惠生,俞海勇,等. 高性能混凝土中多元胶凝材料复合效应的研究[J]. 粉煤灰,2002,(6):3-6.
[2] Zuo J, Darwin D. Splice Strength of Conventional and High Relative Rib Area Bars in Normal and High- strength Concrete [ J ] . ACI Structural Journal,2000,97(4):630-641.
