Effects of joint thickness, adhesion and web shells to the face shell bedded concrete masonry loaded in compression

Thamboo, Julian Ajith, Dhanasekar, Manicka, & Yan, Cheng (2013) Effects of joint thickness, adhesion and web shells to the face shell bedded concrete masonry loaded in compression. Australian Journal of Structural Engineering, 14(3), pp. 291-302.

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The Australian masonry standard allows either prism tests or correction factors based on the block height and mortar thickness to evaluate masonry compressive strength. The correction factor helps the taller units with conventional 10 mm mortar being not disadvantaged due to size effect. In recent times, 2-4 mm thick, high-adhesive mortars and H blocks with only the mid-web shell are used in masonry construction. H blocks and thinner and higher adhesive mortars have renewed interest of the compression behaviour of hollow concrete masonry and hence is revisited in this paper. This paper presents an experimental study carried out to examine the effects of the thickness of mortar joints, the type of mortar adhesives and the presence of web shells in the hollow concrete masonry prisms under axial compression. A non-contact digital image correlation technique was used to measure the deformation of the prisms and was found adequate for the determination of strain fi eld of the loaded face shells subjected to axial compression. It is found that the absence of end web shells lowers the compressive strength and stiffness of the prisms and the thinner and higher adhesive mortars increase the compressive strength and stiffness, while lowering the Poisson's ratio. © Institution of Engineers Australia, 2013.

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ID Code: 69109
Item Type: Journal Article
Refereed: Yes
Keywords: Axial compression, Compressive strength, Digital image correlation, High adhesive mortar, Hollow blocks
ISSN: 1328-7982
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Schools > School of Civil Engineering & Built Environment
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2013 Structural College Board of Engineers Australia
Deposited On: 25 Mar 2014 00:50
Last Modified: 18 Jun 2015 22:22

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