Strength enhancement of recycled fine aggregate beam through chemical treatment - A Waste to Wealth Approach

Abstract

The present research used detailed experimental data to examine the structural behavior of concrete beams incorporating recycled fine aggregates, both treated and untreated.This paper also reveals that microstructural analysis of both treated and untreated recycled fine aggregates. The hydrochloric acid was used for treatment of recycled fine aggregates. Two groups of beam specimens prepared were controlling specimnes and testing specimens. Totally five beam specimens were prepared out of which one control beam with natural fine aggregates, four testing beams with untreated recycled fine aggregates and three beams with treated recycled fine aggregates. The varying molarity of HCL acted as the parameter for examining the structural behavior of the RCFA beams under flexure. The flexural strength of untreated RCFA beams was marginally impacted by the RCFA content, whereas the crack pattern of treated RCFA beams was comparable to that of NCFA beams. Untreated RCFA beams had greater fracture width. Nonetheless, the RCFA concentration had no discernible effect on the beam's ductility. The flexural strength of the RCFA concrete beams was conservatively projected by the present provisions, according to a comparison of the testing data and the calculations from the IS codes, ACI 318, and EC2 regulations for the flexural.