Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 176, Issue -, Pages 652-664Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2018.05.094
Keywords
Concrete; X-ray Cr; Chloride; Water absorption; Crack
Categories
Funding
- 973 Program [201503655102]
- National Natural Science Foundation of China [U1704254, 51779231]
- Jiangsu Key Laboratory for Construction Materials [CM2018-03]
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Concrete structures are frequently suffered to physical and chemical damage in the service period and then cracking is unavoidable. Cracks provide rapid access to aggressive agents and have a significant effect on the durability and service life of concrete structures. In this work, water and chloride transport in cracked mortars were investigated systematically. Firstly, the dynamic process of water transport in cracked mortars was visually monitored by X-ray CT and water absorption of cracked mortar was also quantitatively investigated by the gravimetric method. Later, chloride transport in saturated and unsaturated cracked mortars was studied by natural immersion method. What's more, the effect of gravity on chloride transport in cracked mortar was considered in this study. The results show that the threshold crack width for water absorption of cracked mortar is 0.1 mm. The effect of crack width on chloride transport in saturated and unsaturated mortars is different. The gravity effect improves the rate of chloride transport in cracked mortars. (C) 2018 Elsevier Ltd. All rights reserved.
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