Autoclaved aerated concrete (AAC) shear and tensile bond strengths with various mortar formulations and thicknesses.

Abstract

For masonry walls, autoclaved aerated concrete (AAC) blocks are widely utilised. Compression and tension bonding must constantly be calculated for various mortar mixtures to evaluate the strengths of the AAC block-mortar contact a mortar with a polymer modification and conventional cement sand mortar (1:5 or 1:7) with a thickness of 12mm, 17mm, or 22mm are examined for binding strength on an AAC block mortar interface. Before pouring the cement sand mortar into the brickworks, On the block surface, a thin cement slurry covering was placed. A three-fold analysis was used to estimate the shear bond strength for all types of interfaces, while a cross-couples test was used to evaluate the tensile bond strength.The modified polymer mortar (PMM) had a shear bond strength of 0.15 MPa, with block failure of the vigorous failure type, whereas the cement sand mortar had the greatest shear bond strength of 0.14 MPa, with a cement-sand mortar ratio of 1:5 and a thickness of 17 mm. Since the tensile bond strength of all test specimens utilised in this study was evaluated, PMM had the greatest tensile bond strength of 0.22 MPa. Based on observed failure patterns and the strength of the tensile and shear bond of AAC mats, a 1:5 ratio cement sand or modified polymer mortar with a thickness of 17 mm can be selected from all possibilities for AAC brickwork. Keywords: AAC block, cement sand mortar, polymer-modified mortar.