Compressive stress-strain behavior of concrete with artificial lightweight aggregates and steel-fibers

Abstract

Artificial lightweight aggregate used in the concrete mix is able to reduce the volume of concrete so that when applied to structural concrete it will reduce the weight of the structure. To be used in the structural concrete mix, the compressive strength produced must be able to meet the minimum requirements of structural concrete compressive strength. The addition of steel fibers to concrete with artificial lightweight aggregate can provide a good behavior change to its mechanical properties. This research was conducted experimentally which investigated compressive stress-strain behavior, the main ingredients used to make artificial lightweight aggregate were Styrofoam and acetone with the composition of 0%-100% of coarse aggregate and to increase the compressive strength of steel fibers by 0%-1.5% from the specimen volume. The specimen used was a 100×200 mm cylinder tested using a Universal Testing Machine, the output obtained was the value of stress and strain. The test results show that the stress-strain of the concrete increases with increasing steel fiber composition. Strain value increased by 23% from normal concrete strain. The compressive strength produced from concrete with a mixture of lightweight artificial aggregates and steel-fibers is able to reach the minimum concrete compressive strength requirements.