Modification of chloride diffusion coefficient of concrete based on the electrical conductivity of pore solution
被引:21
作者:
Gao, Pinhai
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South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R ChinaSouth China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China
Gao, Pinhai
[1
]
Wei, Jiangxiong
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South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China
Guangdong Low Carbon Technol Engn Ctr Bldg Mat, Guangzhou 510640, Guangdong, Peoples R ChinaSouth China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China
Wei, Jiangxiong
[1
,2
]
Zhang, Tongsheng
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South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R ChinaSouth China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China
Zhang, Tongsheng
[1
]
Hu, Jie
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South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R ChinaSouth China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China
Hu, Jie
[1
]
Yu, Qijun
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South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China
Guangdong Low Carbon Technol Engn Ctr Bldg Mat, Guangzhou 510640, Guangdong, Peoples R ChinaSouth China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China
Yu, Qijun
[1
,2
]
机构:
[1] South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China
[2] Guangdong Low Carbon Technol Engn Ctr Bldg Mat, Guangzhou 510640, Guangdong, Peoples R China
To correct the influence of pore solution on the chloride diffusion coefficient and set up a comparable permeability test method with other penetration experiments based on rapid chloride migration (RCM), the influence of supplementary cementitious materials (SCMs), including grounded granulated blast furnace slag (GEES) and fly ash (FA), on the electrical conductivity of pore solution was investigated. A modification method of chloride diffusion coefficient was proposed based on the relationship between the electrical conductivity of pore solution and chloride diffusion coefficient. It was found that the modified chloride diffusion coefficients of the same mortars with differential solution by replacing the original pore solution with NaOH solution were almost identical. The modified relative chloride diffusion coefficients of concrete with differential SCM were close to the relative water absorption content. Results indicating that the modified chloride diffusion coefficient eliminates the effect of electrical conductivity of pore solution and could reflects transport property of concrete due to the connectivity pore, thus can be used to evaluate the generally permeability of concrete. (C) 2017 Published by Elsevier Ltd.
机构:
Natl Inst Stand & Technol, Bldg & Fire Res Lab, Gaithersburg, MD 20899 USANatl Inst Stand & Technol, Bldg & Fire Res Lab, Gaithersburg, MD 20899 USA
机构:
Natl Inst Stand & Technol, Bldg & Fire Res Lab, Gaithersburg, MD 20899 USANatl Inst Stand & Technol, Bldg & Fire Res Lab, Gaithersburg, MD 20899 USA