Cementitious fire-retardant coatings are widely used for fire protection of structures. Recently, blended pastes of ordinary Portland cement (OPC) and calcium aluminate cement (CAC) have started to be used as binders in cementitious fire-retardant coatings, but the fire resistance and chemical composition of various OPC/CAC pastes are still not clear. The residual compressive strengths of binary cement pastes with various OPC/CAC ratios after fire exposure were studied in this work. The mineral composition and microstructure of the pastes were characterised by X-ray diffraction and environmental scanning electron microscopy/energy dispersive spectrometry, respectively. It was found that the paste with an OPC/CAC ratio of 60/40 was the most fire-resistant.
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May 2019
Research Article|
April 23 2018
Residual compressive strength of hardened OPC/CAC paste after fire exposure
Qi Zhang;
Qi Zhang
Institute of Advanced Engineering Structures & Materials, College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, China (corresponding author: zhang_qi@zju.edu.cn)
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Shilang Xu;
Shilang Xu
Institute of Advanced Engineering Structures & Materials, College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, China
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Qiang Zeng
Qiang Zeng
Institute of Advanced Engineering Structures & Materials, College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, China
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Publisher: Emerald Publishing
Received:
September 22 2017
Revision Received:
February 22 2018
Accepted:
March 16 2018
Online ISSN: 1751-763X
Print ISSN: 0024-9831
ICE Publishing: All rights reserved
2018
Magazine of Concrete Research (2019) 71 (10): 548–556.
Article history
Received:
September 22 2017
Revision Received:
February 22 2018
Accepted:
March 16 2018
Citation
Zhang Q, Xu S, Zeng Q (2019), "Residual compressive strength of hardened OPC/CAC paste after fire exposure". Magazine of Concrete Research, Vol. 71 No. 10 pp. 548–556, doi: https://doi.org/10.1680/jmacr.17.00446
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