Experimental Study of Mortar Joint Bond Strength of Autoclaved Aerated Concrete Masonry Prism

The quality of masonry determined through bond strength between mortar and brick masonry. Yogyakarta earthquake disaster on 2006 show that most of the damage was caused by the interface failure of mortar joint. The aim of the research was to carried out the mechanical characterization of Masonry wall due to the shear bond strength test based on Experimental test result. The type of masonry wall is Autoclaved Aerated Concrete. This research used 36 masonry prism test samples in four groups, which were STB and SSB with water cement ratio 0.15, 0.2, and 0.25 (18 specimen); STC and SSC with composition of mortar were 1PC:4PS, 1PC:5PS and 1PC:6PS (18 specimen) by volume using water cement ratio of 0,9. The type of mortar used thin bed and cement-sand mortar were 3mm and 1.5cm in thick dimension. This research dealt with four tests (tensile bond strength (tensile test), shear strength bond test, porosity, and specific gravity). The test result show that the masonry wall using thin bed mortar as mortar joint have higher strength (splitting tensile test and shear strength) compare with cement-sand mortar. This means that the autoclaved aerated concrete with thin bed mortar have good resisting performance under earthquake induced lateral loading