Utilization of crushed autoclaved aerated concrete as aggregate in concrete

Abstract

Recently autoclaved aerated concrete has been used in construction as filling material. Utilization of this material can solve insulation problem and also weight of the building is also reduced. After its use, although small in quantity, crushed autoclaved aerated concrete (CAA) are left over. In this study, both for insulation purposes and by applying lightweight concrete to reduce structural loads, reuse of CAA as aggregate in concrete production is aimed at. Concrete samples were produced using CEM I 42.5 Portland cement, river sand, crushed stones with 4-16 mm, 16-32 mm particle sizes and 0 %, 50 % and 100 % CAA instead of these two different kinds of crushed stones. On the concrete samples produced physical and mechanical experiments were performed and whether it is possible to produce concrete with adequate durability and strength was investigated. Decrease in strength and unit weights of the concrete were observed when CAA used.