| Issue |
E3S Web Conf.
Volume 293, 2021
2021 3rd Global Conference on Ecological Environment and Civil Engineering (GCEECE 2021)
|
|
|---|---|---|
| Article Number | 01024 | |
| Number of page(s) | 5 | |
| Section | Ecological Environment Protection and Pollution Control | |
| DOI | https://doi.org/10.1051/e3sconf/202129301024 | |
| Published online | 23 July 2021 | |
The ability of UHPC prepared with unpurified sea sand and seawater to protect embedded steel against corrosion
1 Institute of Building Materials, China Academy of Building Research, Beijing 100013, China
2 State Key Laboratory of Building Safety and Built Environment, Beijing 100013, China
3 National Engineering Research Center of Building Technology, Beijing 100013, China
* Corresponding author: zuqiwang@126.com
Preparing concrete with unpurified sea sand and seawater is of great significance for the construction in coastal areas short of river sand and pure water. However, unpurified sea sand and seawater contain a lot of chloride ions which may cause steel corrosion problems. In this paper, unpurified sea sand and seawater are used to prepare ultra-high performance concrete (UHPC), and the potential differences between the steel bars with protective layer thickness of 5mm and 15mm and the Cu/CuSO4 reference electrode under two types of dry-wet cycle and the chloride ion concentrations at different depths from UHPC specimen surface after 40 dry-wet cycles are tested, the UHPC specimens are broken to observe corrosion of embedded steel bars. The results show that UHPC prepared with unpurified sea sand and seawater has good ability to protect embedded steel reinforcement against corrosion under dry-wet cycle conditions in lab.
© The Authors, published by EDP Sciences, 2021
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