Abstract:
In this study, stress-strain behavior of structural lightweight concrete is studied under unconfined and
confined conditions. To this end, the use of naturally occurring perlite material as lightweight aggregate and cement
replacement material is considered. Although there are several studies on the confinement effects on normal weight
concrete, there is lack of data on the confinement behavior attained for structural lightweight concrete by spiral or
stirrup reinforcement. In order to evaluate the performances of structural lightweight concrete and normal weight
concrete in a reliable manner, an experimental study is conducted. Through the experimental study on cylinder
specimens that are unconfined and confined in different percentages by spiral reinforcement, the elastic and
inelastic, namely post-peak behavior of structural lightweight concrete is recorded by the use of displacementcontrolled
testing machine. The results indicate that concrete produced from perlite as lightweight aggregate as well
as through the use of cement replacement material provide significant energy absorption in the presence of spiral
reinforcement.
