氯离子腐蚀与碱集料反应双重破坏因素作用下混凝土膨胀行为的研究

詹炳根; 孙伟; 许仲梓; 邓敏

doi:10.13204/j.gyjz200502021

氯离子腐蚀与碱集料反应双重破坏因素作用下混凝土膨胀行为的研究

doi: 10.13204/j.gyjz200502021

1.
1. 东南大学,材料科学与工程系,南京,210096;
2.
2. 南京工业大学,材料科学与工程学院,南京,210018

基金项目:

国家重点基础研究发展规划(9732项目)资助(编号:2001CB610706)

详细信息

作者简介:
詹炳根男 1964年3月出生博士生副教授

中图分类号: TU528
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- 被引次数: 0
出版历程
- 收稿日期: 2004-06-20
- 刊出日期: 2005-02-20

RESEARCH ON CONCRETE EXPANSION BEHAVIOR SUBJECTED TO CHLORIDE CORROSION AND ALKALI-AGGREGATE REACTION

1.
1. Department of Material Science and Engineering,Southeast University Nanjing 210096;
2.
2. College of Material Science and Engineering,Nanjing Polytechnic University Nanjing 210018

摘要

摘要: 进行了氯化钠与碱集料反应双重破坏因素作用下混凝土的膨胀试验, 目的是研究有氯化钠存在时碱集料反应的规律。试验中采用了高低两种不同碱含量的混凝土, 浸泡液用1NNaCl、1NNaOH及其分别与3%和7%的NaCl的复合, 碱集料反应环境温度为38℃。研究结果表明, 不论何种复合, 高碱含量混凝土的膨胀均比低碱含量的混凝土高;对于低碱含量混凝土, 在早期, 1NNaCl溶液对混凝土膨胀的值高于1NNaOH溶液, NaOH与NaCl的复合会导致更低的膨胀值, 但在后期, 结果正好相反;对于高碱含量混凝土, 则不论在早期还是后期, 1NNaCl溶液对混凝土膨胀的值均低于1NNaOH溶液, NaOH与NaCl的复合会导致更高的膨胀值。
- 氯离子腐蚀 /
- 碱集料反应 /
- 混凝土 /
- 耐久性
Abstract: Concrete expansion test was conducted under the actions of sodium chloride and alkali-aggregate reaction,whose aim was to study the rule of alkali-aggregate reaction in the presence of sodium chloride.The concretes with high and low alkali contents were used for the test.1N NaOH, 1N NaOH+3% NaCl and 1N NaOH+7% NaCl were all used as the soak, and the ambient temperature of the reaction was 38℃.The results show that under all soaks the expansions of the high-alkali concrete are higher than those of the low-alkali concrete.At the period of low-alkali concrete, the expansion by 1N NaCl soak is higher than that by 1N NaOH, and a further lower expansion can be produced by NaOH+NaCl soak, yet at the late stage the results are exactly opposite; whereas at the early and late stages of high-alkali concrete, the expansion by 1N NaCl soak is lower than that by 1N NaOH, a further higher expansion can be produced by NaOH+NaCl soak.
- chloride corrosion /
- alkal-iaggregate reaction /
- concrete /
- reliability

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参考文献(17)

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