Abstract

This research work includes production of new type of light weight
concrete and studies the mechanical and thermal properties. Several proportions
of raw materials were used to produce this type of concrete. This study is
intended to produce light weight concrete with low thermal conductivity so that
it can be used for concrete masonry units. Polystyrene aggregate was added as
percentages by weight of cement to improve the thermal properties of this type
of concrete .Mechanical , and thermal tests with difference ages were made in
this work .For polystyrene concrete with polystyrene cement ratio (p/c) of (2.67
– 6 )% , the28-day compressive strength range is from (4.31 – 2.67)MPa,
flexural strength range is from (3.05-1.719 ) MPa , density range is from (
1493-1213 ) kg/m 3 ,and thermal conductivity range is from ( 0.91-0.782)% as a
percentage by that of reference mix. The study show suitability of this type of
concrete to be used in concrete masonry units of non-bearing walls.