Experimental Investigation on Behavior of Concrete Exposed to ISO Rate of Heating

Author(s): Daniel T. Paul, Anand.N and Prince G. Arulraj
Paper category: Proceedings
Book title: Proceeding of the 71st RILEM Annual Week & ICACMS 2017
Editor(s): Manu Santhanam, Ravindra Gettu, Radhakrishna G. Pillai, Sunitha K. Nayar
ISBN:978-2-35158-195-7, 978-2-35158-190-2 (Set)
e-ISBN: 978-2-35158-191-9
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 435-442
Total Pages: 8
Language : English

Abstract: Concrete can withstand the effects of fire and retain much of its load carrying capacity. However exposure for a longer time, or to too intensive a fire, can seriously damage the structures. Even though concrete is a poor conductor of heat, it can suffer considerable damage when exposed to fire. Assessment of fire damage on concrete structures usually starts with visual observation of change in colour, cracking and spalling. Concrete elements exposed to fire experience temperature gradients and, as a result, undergo physical changes or spalling, thereby exposing steel reinforcement. In this research, an experimental investigation has been carried out to investigate the behaviour of concrete exposed to ISO rate of heating. The tested temperatures were 925°C, 1029°C, 1090°C and 1133°C with the exposure duration of 1 hour, 2 hour, 3 hour and 4 hour. Heated specimens are cooled in air for 24 hour. Cylinder compressive strength of concrete, microstructure properties and weight loss of specimens subjected to elevated temperature were determined. Microstructure properties of fire exposed concrete were investigated by SEM analysis. A significant reduction in compressive strength and weight has been observed for heated specimens. SEM investigation confirmed the higher porosity of heated specimens.

Online publication :2017
Publication type :full_text
Public price (Euros) : 0.00