Experimental investigation on the compressive strength of PFGP-covered concretes exposed to high temperature
Journal of Structural Fire Engineering
ISSN: 2040-2317
Article publication date: 27 June 2019
Issue publication date: 11 October 2019
Abstract
Purpose
This study aims to investigate the effect of high temperature (600°C) on the compressive strength of concrete covered with a mixture of polypropylene fiber and gypsum plaster (PFGP).
Design/methodology/approach
To study the compressive strength of concrete specimens exposed to temperature, 16 cubic specimens (size: 150 mm × 150 mm × 150 mm) were made. After 28 days of processing and gaining the required strength of specimens, first, polypropylene fiber was mixed with gypsum plaster (CaSO4.2H2O) and then the concrete specimens were covered with this mixture. To cover the concrete specimens with the PFGP, the used PFGP thickness was 15 mm or 25 mm. The polypropylene rates mixed with the gypsum plaster were 1, 3 and 5 per cent. A total of 14 specimens, 12 of which were covered with PFGP, were exposed to high temperature in two target times of 90 and 180 min.
Findings
The results show that the PFGP as covering materials can improve the compressive strength lost because of the heating of the concrete specimens. The results also show that the presence of polypropylene fiber in gypsum plaster has the effect on the compressive strength lost because of the heating of the PFGP-covered concrete. The cover of PFGP having 3 per cent polypropylene fiber had the best effect on remained strength of the specimens.
Originality/value
The cover of PFGP having 3 per cent polypropylene fiber has the best effect on remained strength of the PFGP covered specimens exposed to temperature.
Keywords
Citation
Keykha, A.H. (2019), "Experimental investigation on the compressive strength of PFGP-covered concretes exposed to high temperature", Journal of Structural Fire Engineering, Vol. 10 No. 4, pp. 399-410. https://doi.org/10.1108/JSFE-11-2018-0033
Publisher
:Emerald Publishing Limited
Copyright © 2019, Emerald Publishing Limited