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Abstract

This paper reported an investigation on six mixes of Lightweight Aggregate Concrete (LWAC) were produced to study the effect of elevated temperature (200 to 700 °C) on the residual mechanical properties. The first three mixes were considered as reference mixes consisting of cement, Porcelanite as coarse aggregate, and fine Porcelanite as a partial replacement and total replacement of sand. Two percent of foam agent by weight of water was added to produce Lightweight Aggregate Foamed Concrete (LWAFC). The results of testing showed that the high elevated temperatures resistance of foamed concrete is better in terms of the proportional loss in strength than normal concrete. Also, the mechanical properties of LWAFC containing 50% and 100% of fine Porcelanite aggregate are less affected by high temperature than the sanded LWAFC.