Abstract: The effects of replacing coarse aggregate by fly ash on strength, compressive stress-strain relationship, and fracture behavior of concrete were investigated. The investigation covered concrete mixes at different water-cementitious material ratios, which contained low and high volumes of fly ash. It was found that fly ash substantially improved the post-peak compressive behavior of concrete, with a relatively smaller gradient in the descending part of the stress-strain curve. Low volumes of fly ash improved the tensile strength of concrete. The specific gravity and the bulk density of fly ash aggregates when compared to the conventional aggregates are lesser. Because of the porous nature of aggregates the water absorption is more compared to the natural aggregates. Compressive strength of fly ash aggregates is more compared to the other proportion and conventional concrete. The weight and density of fly ash aggregate concrete is comparatively less when compared to conventional concrete.
Keywords: Suitability of fly ash, Palletisation technique, fly ash, light weight aggregates, Production & characterization of fly ash, Tests on fine and coarse aggregates, Mix design, Crushing and impact value, Compression Strength values, Properties.
Title: Suitability of Fly Ash Aggregates as Coarse Aggregates in Concrete
Author: NEHA.S
International Journal of Civil and Structural Engineering Research
ISSN 2348-7607 (Online)
Research Publish Journals
