Effect of different additives on high temperatures of concrete
Journal of Structural Fire Engineering
ISSN: 2040-2317
Article publication date: 17 July 2017
Issue publication date: 17 May 2018
Abstract
Purpose
This study aims to investigate the effectiveness of different additives (individual effects) in improving the strength of concrete to resist temperatures of up to 60ºC.
Design/methodology/approach
In all, 13 different mixtures with a constant water/binder ratio of 0.36 and grade M40 were prepared by using ordinary Portland concrete alone, or with partial replacement by fly ash (FA), blast-furnace slag, silica fume (SF) and a combination of all three. After 7 and 28 days under water, their strength and residual strength were measured.
Findings
The results of testing revealed that the addition of 10 per cent SF was found to result in the greatest increase in compressive strength and flexural strength along with decreased the residual strengths. The addition of FA increased the compressive strength and enhanced the residual compressive strength. However, it also decreased the residual flexural strength.
Originality/value
The addition of slag achieved better flexural strength and the best residual compressive strength. The combination of additives also enhanced the compressive strength but was not found to be better than using SF alone.
Keywords
Acknowledgements
This research project was sponsored and fully funded by the School of Civil Engineering at Northeast Forestry University.
Citation
A.M. Mhamoud, H. and Yanmin, J. (2018), "Effect of different additives on high temperatures of concrete", Journal of Structural Fire Engineering, Vol. 9 No. 2, pp. 161-170. https://doi.org/10.1108/JSFE-01-2017-0021
Publisher
:Emerald Publishing Limited
Copyright © 2018, Emerald Publishing Limited