Abstract:
Light weight concrete is widely used in various civil engineering fields due to its low
density compared to normal conventional concrete. Compared with normal weight
concrete, lightweight concrete can significantly reduce the dead load of structural
elements, which makes it especially attractive in multi-story buildings. The main aim of
the present study was investigating engineering properties of light weight concrete using
pumice and scoria as coarse aggregates. The mix design is carried out for C-20 grade
concrete mixes; the coarse aggregate proportion is partially replaced by blended
aggregates (pumice and scoria) in various percentages by weight. Coarse aggregate was
replaced with pumice and scoria in weight percentages of 12.5%, 25%, 50%, 75% and
100. The properties like fresh and hard, destructive and non-destructive of above
combinations were studied and compared with conventional concrete mix design. The
experimental results showed that the partial replacement of coarse aggregate proportion
with 75% normal aggregate, 25% scoria (AS), 50% normal aggregate, 50% scoria
(AS1), 25% normal aggregate, 75% scoria (AS2) and 75% normal aggregate 12.5% of
pumice and 12.5% of scoria aggregates (APS) have given the optimum proportion
among the proportions tested for the properties studied in the present investigation.
