Title: Improved behaviour of mortars at a high temperature by using refractory brick wastes

Authors: Mohammed Saidi; Brahim Safi; Khaled Bouali; Abdelbaki Benmounah; Madjid Samar

Addresses: Materials, Processes and Environment (UR/MPE), Boumerdes University, Frantz Fanon City, Boumerdes, 35000, Algeria ' Materials, Processes and Environment (UR/MPE), Boumerdes University, Frantz Fanon City, Boumerdes, 35000, Algeria ' Materials, Processes and Environment (UR/MPE), Boumerdes University, Frantz Fanon City, Boumerdes, 35000, Algeria ' Materials, Processes and Environment (UR/MPE), Boumerdes University, Frantz Fanon City, Boumerdes, 35000, Algeria ' Materials, Processes and Environment (UR/MPE), Boumerdes University, Frantz Fanon City, Boumerdes, 35000, Algeria

Abstract: The study aim is to investigate the reusing of refractory brick wastes (RBW) as a fine aggregate (by a partial substitution of sand) to produce cement mortar. RBW were finely crushed at a high-specific surface and have been introduced in cement mortar by sand substitution (0, 10, 20, 30 and 50 wt.%). The fresh and hardened properties of mortars were evaluated at 28-days, the refractory brick-based mortars have been subjected to heat treatment according a thermal cycle with multiple levels (20, 600, 700, 900, 1010 and 1100°C) for 8 h with a dwell in each temperature chosen. The results show that proportional increase in mass loss as a function of temperature. However, the mortar with 20% of RBW shows good thermal stability since its mass loss is lower compared with other compositions. The mortar sample with 10% of RBW cannot resist at high temperatures (chipping, cracking and splitting).

Keywords: RBW; refractory brick waste; cement mortar; fine aggregate; high temperature; compressive strength; loss weight; mortar behaviour; sand substitution; heat treatment; mass loss; thermal stability; mortar chipping; mortar cracking; mortar splitting.

DOI: 10.1504/IJMMP.2015.074992

International Journal of Microstructure and Materials Properties, 2015 Vol.10 No.5/6, pp.366 - 380

Received: 04 Jul 2015
Accepted: 20 Oct 2015

Published online: 28 Feb 2016 *

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