Residual Properties of Concrete Containing Recycled Refractory Brick Aggregate at Elevated Temperatures
Publication: Journal of Materials in Civil Engineering
Volume 30, Issue 1
Abstract
In this paper, the compressive stress-strain behavior of recycled aggregate concrete with different replacement levels of conventional fine aggregate by recycled particles obtained from used refractory bricks (0, 25, 50, 75, and 100% replacement level by volume) is investigated in two groups, one containing ordinary portland cement and the other containing calcium aluminate cement, after exposure to elevated temperatures (110, 200, 400, 600, 800, and 1,000°C). For this purpose, the parameters that affect the compressive behavior of recycled refractory brick aggregate concrete (RRBC), including compressive strength, strain at peak stress, modulus of elasticity, and toughness, as well as the shape of the stress-strain curve following exposure to elevated temperatures were evaluated and compared to those predicted by international codes. Finally, a stress-strain model to predict the compressive behavior of RRBC at elevated temperatures was proposed. The results indicate that a significant degradation occurs for most of the mechanical properties of the ordinary cement-containing concrete at 400°C and for the aluminate cement-containing concrete at 110°C. Furthermore, higher contents of refractory brick fine aggregate improve the concrete compressive behavior at higher temperatures.
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Published In
Journal of Materials in Civil Engineering
Volume 30 • Issue 1 • January 2018
Copyright
©2017 American Society of Civil Engineers.
History
Received: Jan 12, 2017
Accepted: Jul 7, 2017
Published online: Oct 31, 2017
Published in print: Jan 1, 2018
Discussion open until: Mar 31, 2018
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