A REVIEW OF TO EVALUATE THE STRENGTH AND DURABILITY OF FLY ASH BASE LIGHTWEIGHT AGGREGATE CONCRETE

Abstract

In this paper the investigation is done over the utilization and the suitability of the lightweight concrete to be used as a structural concrete. In this investigation it is observed that the lightweight concrete has a significant compressive strength. It is observed that fibres that are included inside the concrete do not affect the compressive strength of concrete but rather it increases the tensile strength of concrete. It is also observed that as compared to normal-weight concrete, the modulus of elasticity of all the lightweight concretes tested was less. However, the elastic modulus is not affected by the fibre reinforcement. The lightweight concrete shows similar early stage shrinkage behaviour as that shown by the normal weight concrete. The volcanic pumice (VP) can also be used in the lightweight concrete as a cement replacement. The VPC has high permeability and initial surface absorption and has low modulus of elasticity as compared to control concrete. The expanded polystyrene (EPS) beads are also used as lightweight aggregate, both in concrete and mortar.