Behavior of infill concrete masonry unit block with addition of waste asphalt under static loading

Abstract

Concrete masonry unit has been widely used around the world including in Malaysia. There are several reasons on why concrete masonry unit is chosen to be one of the materials for cavity wall construction. One of the reasons is because it has high durability. The amount of waste asphalt pavement increase each year due to rehabilitation work and these wastes were transported into the landfills. As the quantity increases, this has become a problem to the landfills caused by the space consume by this waste. Therefore, the waste asphalt pavement needs to start recycle to reduce its accumulation in landfill. In this study, concrete masonry block was used to study its behavior under static loading as it was widely used in the construction of medium and high rise building. The addition of waste asphalt as a composite material and as a concrete infill for masonry block was studied. Meanwhile, the effect of these waste materials towards compressive strength was observed. Additionally, two methods were applied in this study which is Powder method and Liquidation method. The compressive strength for each sample was measured and the results obtained were compared between the samples according to their respective technique. The compressive strength for concrete infill masonry block using Powder Method was 1.27 N/mm2 at 4.26 mm displacement and for Liquidation Method it was 1.53 N/mm2 at 4.89 mm displacement. There was slight difference in the compression result between both methods as compared to the control sample. As a result, the ultimate loads for both samples are 45.85 kN and 59.66 kN for Powder and Liquidation Method. It was found that there are effects of compressive strength capacity when different methods were applied in designing the masonry structure. Besides that, the cracking pattern was observed in the masonry block by using a Vernier caliper and the average result for Powder Method is 2.77 mm and 1.57 mm for Liquidation method. Lastly, there are few recommendations proposed in order to enhance the study of masonry wall.