Bond Development in Burnt Clay and Fly Ash-Lime-Gypsum Brick Masonry
Publication: Journal of Materials in Civil Engineering
Volume 30, Issue 9
Abstract
Fly ash bricks are used for load-bearing masonry. The bond development between the masonry unit and the mortar is mainly due to the mechanical interlock of cement hydration products in the brick pores. This paper deals with the investigations in understanding the phenomenon of bond development between the fly ash-lime-gypsum (FaL-G) brick and the mortar. The bond strength of the FaL-G brick masonry and the burnt clay brick masonry was determined. Apart from quantifying the bond strength of FaL-G and burnt clay brick masonry, microstructure analysis of the materials at the brick-mortar interfaces was carried out using scanning electron microscopy (SEM), X-ray diffraction (XRD), and thermogravimetric analysis (TGA) techniques to establish the evidence and to quantify the chemical bond development between the FaL-G brick and the mortar. The results show that the flexure bond strength of FaL-G brick masonry is an order of magnitude higher than that of the bond strength of burnt clay brick masonry. This is attributed to the chemical bond between FaL-G brick and the mortar, which has been demonstrated in this study.
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Published In
Journal of Materials in Civil Engineering
Volume 30 • Issue 9 • September 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Sep 19, 2017
Accepted: Mar 6, 2018
Published online: Jun 21, 2018
Published in print: Sep 1, 2018
Discussion open until: Nov 21, 2018
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