| Issue |
E3S Web Conf.
Volume 136, 2019
2019 International Conference on Building Energy Conservation, Thermal Safety and Environmental Pollution Control (ICBTE 2019)
|
|
|---|---|---|
| Article Number | 03011 | |
| Number of page(s) | 7 | |
| Section | Energy Conservation Renovation of Green Buildings and Existing Buildings | |
| DOI | https://doi.org/10.1051/e3sconf/201913603011 | |
| Published online | 10 December 2019 | |
Bentonite replacing part of cement concrete for resistance to chloride ion attack
1 School of Civil Engineering, Changsha University of Science and Technology, Changsha, Hunan, 410114, China
2 School of Energy and Power, Changsha University of Science and Technology, Changsha, Hunan, 410114, China
* Corresponding author, email: leiwang@csust.edu.cn
Bentonite is known as a kind of natural pozzolan that can improve the mechanical properties of cementitious materials and reduce the overall CO2 output of cement production. This study is designed to evaluate the feasibility of using bentonite as a substitute for cement in concrete and analyze the effect of bentonite on resisting chloride ion penetration. The concrete was replaced by equal-quality bentonite for 0%, 5%, 10%, 15% and 20% cement respectively, and the water-cement ratio, fine and coarse aggregate content remained constant. The results indicated that as the bentonite content increased, the compressive strength of the mixes increased first and then decreased. The sample containing 10% bentonite got a higher compressive strength than the other samples. The rapid chloride migration (RCM) tests showed that the samples containing bentonite had better resistance to chloride ion attack than samples without bentonite against chloride, especially the sample containing 10% bentonite. It can be concluded that the concrete with 10% bentonite can improve the resistance to chloride ion diffusion with high compressive strength.
© The Authors, published by EDP Sciences, 2019
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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