[1]张君,居贤春,公成旭.混凝土中的裂缝对氯盐侵蚀作用的影响[J].哈尔滨工程大学学报,2010,(06):0.
 ZHANG Jun,JU Xian chun,GONG Cheng xu.Effect of cracks in concrete on chloride penetration[J].hebgcdxxb,2010,(06):0.
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混凝土中的裂缝对氯盐侵蚀作用的影响(/HTML)
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《哈尔滨工程大学学报》[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2010年06期
页码:
0
栏目:
出版日期:
2010-06-25

文章信息/Info

Title:
Effect of cracks in concrete on chloride penetration
作者:
张君居贤春公成旭
(清华大学土木工程系 结构工程与振动教育部重点实验室,北京100084)
Author(s):
ZHANG Jun JU XianchunGONG Chengxu
(Department of Civil Engineering, Key Laboratory of Structural Engineering and Vibration of China Education Ministry, Tsinghua University, Beijing 100084, China)
关键词:
混凝土裂缝氯离子渗透耐久性
分类号:
TU528
文献标志码:
A
摘要:
为了研究裂缝对氯离子侵蚀作用的影响,采用弯曲试验预先在混凝土梁中产生宽度不等的弯曲裂缝,然后通过3% NaCl盐溶液浸泡一定龄期后钻心取样,测定裂缝处混凝土内氯离子含量.试验结果表明,混凝土中裂缝对氯盐环境下氯离子渗透的影响是显著的,裂纹大大加快了氯离子的侵蚀速度.裂纹处(裂缝宽度120~500 μm)氯离子浓度为相同浸泡龄期无裂纹处的2~3倍.浸泡30 d时,裂纹处氯离子含量随裂缝宽度增大而增加,60 d时氯离子含量基本达到饱和,不受裂缝宽度影响,此时氯离子含量受浸泡深度影响不大.未开裂混凝土,即使氯盐浸泡60 d,氯离子含量随浸泡深度仍呈逐渐减少的趋势.

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备注/Memo

备注/Memo:
国家自然科学基金资助项目(50878119);交通部西部交通建设科技资助项目(20063182230206)
更新日期/Last Update: 2010-07-06