Utilization of Volcanic Rock Waste in Concrete Block

Abstract

This research aims to study the use of quarry dust from volcanic rock mine as aggregate (basalt) in concrete block products. The mixture ratio of Portland cement type 1 : quarry dust : water is 1 : 8 : 0.6 by weight. Four types of quarry dust from volcanic rock mine and limestone mine (general aggregate) were compared in concrete block properties. The concrete block samples were cast in 7 x 19 x 39 cubic centimeter of dimension with concrete block molding machine. The concrete block sample testing followed the TIS 58-2533 on non-load bearing concrete blocks. From the experiment, the density, compressive strength, and thermal insulation of volcanic rock concrete blocks were lower than general concrete blocks. In addition, the water absorption and dry shrinkage were higher than general concrete blocks. However, all of the concrete block samples can be classified as the standard so it can be used as materials for a thermal insulation wall.