Development of green masonry mortar using fine recycled aggregate based on the shear bond strength of brick masonry

The investigation is intended to develop a green masonry mortar using fine recycled aggregate (FRA) for sustainable building construction. The FRA was obtained from the demolished concrete debris and its influence in shear bond strength of brick masonry was evaluated to predict the suitability. The shear bond strength was determined using the masonry triplet specimens in stage-I without applying pre-compressive stress for finding the optimum replacement level of FRA and with pre-compressive stress value of 0.2, 0.4, 0.6 and 0.8 N/mm(2) for finding the angle of friction in stage-II. The masonry mortar was prepared by replacing the river sand at the rate of 10%, 20%, 30%, 40% and 50% using FRA. Three different bricks were used for investigation based on its strength. The triplet specimens were casted with 12 mm and 18 mm mortar thickness and the specimens were cured 28 and 56 days. It was evidenced from the investigation that the substitution of recycled aggregate was influenced the shear bond strength of masonry structures and the optimum replacement level was predicted using the relationship between the dosage of recycled aggregate and the shear bond strength and the factors influencing the shear bond strength of brick masonry was decided in the order of Mortar strength > Brick strength > Mortar thickness with 20% replacement of river sand by recycled aggregate. Copyright (C) 2022 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the F-EIR Conference 2021 on Environment Concerns and its Remediation: Materials Science