[1]龙广成,邢锋,余志武,等.氯离子在混凝土中的沉积特性研究[J].深圳大学学报理工版,2008,25(2):117-121.
 LONG Guang-cheng,XING Feng,YU Zhi-wu,et al.Characteristics of chloride ion sedimentation in concrete[J].Journal of Shenzhen University Science and Engineering,2008,25(2):117-121.
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氯离子在混凝土中的沉积特性研究()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第25卷
期数:
2008年2期
页码:
117-121
栏目:
土木建筑工程
出版日期:
2008-04-30

文章信息/Info

Title:
Characteristics of chloride ion sedimentation in concrete
文章编号:
1000-2618(2008)02-0117-05
作者:
龙广成1邢锋2余志武1谢友均1
1)中南大学土木建筑学院,长沙 410075;
2)深圳大学土木工程学院,深圳市土木工程耐久性重点实验室,深圳518060
Author(s):
LONG Guang-cheng1XING Feng2YU Zhi-wu1and XIE You-jun1
1)School of Civil Engineering  and Architecture,Central South University,Changsha 410075,P.R.China
2)College of Civil Engineering,Shenzhen Municipal Key Laboratory  on Durability of Civil Engineering,Shenzhen University,Shenzhen 518060,P.R.China
关键词:
混凝土氯离子沉积干湿循环浸泡试验水胶比
Keywords:
concretechloride ionsedimentationdry-wet cycleimmersionratio of water to cement
分类号:
TU 528;TU 503
文献标志码:
A
摘要:
基于典型服役环境条件,采用干湿循环和浸泡试验方法,通过测试不同条件下混凝土内部不同位置氯离子含量,研究外部氯离子在混凝土中的沉积特性.试验结果表明:混凝土内部不同位置处水溶性氯离子的沉积量与离表面的距离之间存在自然对数的衰减关系,且混凝土的水胶比和矿渣等因素对其衰减速率存在较大的影响.氯离子在混凝土中的沉积规律受外部环境条件的影响较为显著.喷淋干湿循环处理条件下,氯离子大量沉积于混凝土表层10 mm以内的区域,随距混凝土表面距离的增加,离子沉积量迅速下降.
Abstract:
The profiles of chloride ion in concrete were obtained from the results of experiments that were under typical conditions such as dry-wet cycle and immersion condition. The characteristics of chloride ion sedimentation were analyzed. The results indicate that the amount of chloride ion sedimentation is attenuated by the natural logarithm function of distance from external surface of the sample,and the corresponding attenuation rate is changed greatly by the ratio of water to cement and mineral admixture such as slag. Chloride ion is mainly deposited in surface zone under dry-wet cycle condition. The ambient condition can also affect the chloride ion sedimentation in concrete. Most of chloride ions are deposited within 10 mm distance from surface under sprinkling dry-wet cycle condition. The amount of chloride ion sedimentation rapidly reduces with increasing distance from external surface of the sample.

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备注/Memo

备注/Memo:
收稿日期:2007-09-21;修回日期:2008-02-19
基金项目:国家自然科学基金资助项目(50538060);深圳市土木工程重点实验室资助项目(CED06-03)
作者简介:龙广成(1973-),男(汉族),江西省万载县人,中南大学副教授、博士后研究人员.E-mail:lgc263@yahoo.com.cn
通讯作者:邢锋(1965-),男(汉族),深圳大学教授、博士生导师.E-mail:xingf@szu.edu.cn
更新日期/Last Update: 2008-05-08