Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 146, Issue -, Pages 493-501Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2017.04.018
Keywords
Concrete; Fly ash; Transport property; Microstructure; Atmospheric chloride; Durability
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Funding
- Natural Science Foundation of China [51578340]
- Shenzhen City Science and Technology Project [JCYJ20140418182819141, JCYJ20160422102136542]
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This paper presents a comprehensive investigation regarding the chloride transport and microstructure of plain concrete and fly ash blended concrete under atmospheric chloride environment. Experimental results demonstrate that all the free, bound, and total chlorides show a build-up of ion concentration in the chloride profile. A linear relationship between the total and free chloride content is observed. Both water-to-cement ratio and fly ash content have great impact on the chloride binding capacity and the chloride diffusion coefficient. Microscopic properties (e.g. morphology, pore size distribution, porosity) are evaluated for chloride-contaminated concrete, and their correlation with the chloride transport behavior is discussed. (C) 2017 Elsevier Ltd. All rights reserved.
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