期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 256, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2020.119458
关键词
Ultra-high performance fibre reinforced concrete (UHPFRC); Corrosion; Simulated marine environment; Steel fibre network; Macro/micro characteristics
资金
- National Nature Science Foundation Project of China [51608409, 51679179]
- National Key R&D Program of China [2017YFB0310001]
- Major science and technology project in Zhongshan city, Guangdong province [2019AG030]
- Science and Technology Program of Guangdong Province in 2017 [2017B090907009]
- Science and Technology Program of Guangdong Province in 2016 [2016A090924002]
- Late-model Research Institute Development Program of Zhongshan in 2016: Subsidy for Major Research Platform Construction [2016F2FC0008]
- foundation of Zhongshan Institute of Advanced Engineering Technology of WUT [WUT201902]
This study presents the macro/micro characteristics variation of ultra-high performance fibre reinforced concrete (UHPFRC) subjected to critical marine environment. The UHPFRC matrix is designed based on the modified Andreasen & Andersen model, and the steel fibres are included by 0 vol%, 0.5 vol%, 1.0 vol%, 1.5 vol%, 2.0 vol%, 2.5 vol% and 3.0 vol%, respectively. Generally, three kind of marine environments are simulated in this study: high temperature-seawater, dry-wet cycle-seawater and normal seawater. Then, after servicing in these mentioned marine environments for 180 days, the properties of UHPFRCs are evaluated, including the sample appearance, compressive strength, electrochemical parameters, hydration products and pore structure. The obtained experimental results show that compared to the samples serviced in dry-wet cycle-seawater and normal seawater, the UHPFRC subjected to high temperature seawater can be seriously deteriorated. Additionally, though the UHPFRC can be treated as a dense composite with advanced durability, the connection of short steel fibres can easily induce electrochemical corrosion for UHPFRC, especially under the multiply effects of high ions concentration and drywet cycle of critical marine environment. (C) 2020 Elsevier Ltd. All rights reserved.
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