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[1]卢一亭,余红发,马好霞,等.海洋环境下混凝土自由氯离子扩散系数试验[J].建筑科学与工程学报,2011,28(04):86-91.
　LU Yi-ting,YU Hong-fa,MA Hao-xia,et al.Experiment on Free Chloride Diffusion Coefficient of Concrete Exposed to Marine Environment[J].Journal of Architecture and Civil Engineering,2011,28(04):86-91.
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
28卷
期数:
2011年04期
页码:
86-91
栏目:
出版日期:
2011-12-20

文章信息/Info

Title:
Experiment on Free Chloride Diffusion Coefficient of Concrete Exposed to Marine Environment
作者:
卢一亭1,余红发1,马好霞1,胡蝶2
1. 南京航空航天大学 土木工程系,江苏 南京 210016; 2. 南京联勘科技有限公司,江苏 南京 210019
Author(s):
LU Yi-ting1, YU Hong-fa1, MA Hao-xia1, HU Die2
1. Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China; 2. Nanjing Liankan Technology Co. Ltd, Nanjing 210019, Jiangsu, China
关键词:
混凝土;  养护龄期;  自然扩散法;  矿物掺合料;  自由氯离子扩散系数;  时间依赖性
Keywords:
concrete;  curing age;  natural diffusion method;  mineral admixture;  free chloride diffusion coefficient;  time dependence
分类号:
TU528.041
DOI:
-
文献标志码:
A
摘要:
采用自然扩散法研究了普通混凝土、粉煤灰混凝土和矿渣混凝土在模拟海水环境中的氯离子扩散特性,探讨了养护龄期、暴露时间及矿物掺合料掺量对混凝土自由氯离子扩散系数的影响。结果表明:混凝土的自由氯离子扩散系数随着暴露时间的延长呈幂指数降低,而且其时间依赖性与养护时间及矿物掺合料掺量有关; 当养护龄期达到730 d、粉煤灰和矿渣掺量(质量分数)分别达到30%和45%时,混凝土的自由氯离子扩散系数随暴露时间的降低速度最快; 延长养护龄期及掺加粉煤灰和矿渣,对于降低混凝土的长期自由氯离子扩散系数具有重要的作用。
Abstract:
The chloride diffusion characteristics of ordinary Portland concrete, fly ash concrete and slag concrete exposed to substitute ocean water were investigated, and influences of curing age, exposing time and content of mineral admixture on free chloride diffusion coefficients of concrete were discussed by using the natural diffusion method. Results show that free chloride diffusion coefficients of concrete exponentially decrease with exposing time, and time dependence is related to curing age and content of mineral admixture. When curing age can reach 730 d, and contents(mass proportions)of fly ash and slag can reach 30% and 45% respectively, free chloride diffusion coefficients of concrete reduce most quickly with exposing time. Therefore, extending curing age and adding fly ash and slag have such a great impact on reduction of long-term free chloride diffusion coefficient of concrete.

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备注/Memo

备注/Memo:
收稿日期:2011-10-10
基金项目:国家重点基础研究发展计划(“九七三”计划)项目(2009CB623203); 国家自然科学基金项目(51178221)
作者简介:卢一亭(1987-),女,广东普宁人,工学硕士研究生,E-mail:luyt09@nuaa.com。
更新日期/Last Update: 2011-12-20