EXPLORING THE STRENGTH PROPERTIES OF CONCRETE MADE WITH RECLAIMED ASPHALT PAVEMENT AGGREGATES

This research project explores the strength properties of concrete incorporating Reclaimed Asphalt Pavement (RAP) aggregates as a partial replacement for virgin coarse aggregates. The study was aimed at assessing the feasibility of using RAP as a sustainable alternative in concrete production, examining its effects on compressive strength and workability. Concrete mixes were prepared with RAP replacement levels of 10%, 20%, and 30%, and their performance were compared to control mixes with 0% RAP. Comprehensive testing, including slump tests, compressive strength tests at 7 and 28 days, sieve analysis, and specific gravity, were conducted to evaluate the properties of RAP-modified concretes. Morphological analysis using Scanning Electron Microscopy (SEM) and X-ray Fluorescence (XRF) were also performed to investigate the elemental composition of concrete made with RAP and virgin coarse aggregates. The results indicated that as the RAP content increased, there was a slight reduction in compressive strength. However, even at 30% RAP replacement, the concrete exhibited acceptable compressive strength at 28 days, making it suitable for various construction applications. The slump values also increased with higher RAP content, demonstrating improved workability. The findings suggested that RAP can be effectively utilized as a partial replacement for virgin aggregates in concrete, contributing to sustainable construction practices without significantly compromising strength or durability.