Evaluation of Aggregate Properties for Enhancing Infrastructure Resilience in Disaster-Prone Environments

Abstract

The functionality of building infrastructure is profoundly affected by disasters, particularly flooding and earthquakes. Coarse aggregates, as key components in concrete and pavement construction, play a critical role in enhancing infrastructure resilience. These aggregates are typically derived from natural sources, such as riverbeds and quarries, where they undergo processes of extraction, crushing, and grading. This study evaluates the engineering properties of coarse aggregates from 50 locations in Assam, India, to assess their suitability for construction applications. Experiments were conducted to measure water absorption, specific gravity, abrasion resistance, crushing strength, impact value, flakiness, elongation, and soundness. Based on the results, a coarse aggregate reliability map of Assam was developed, classifying the aggregates into three categories: highly reliable, moderately reliable, and low reliable. Representative samples from each category (six in total) were used to produce concrete, and compressive strength tests were performed.
The findings reveal that aggregates from highly reliable sources exhibit superior compressive strength compared to those from moderately and low reliable sources. This research emphasizes the critical importance of selecting high-quality aggregates to improve the durability, structural integrity, and resilience of infrastructure. Enhanced material selection reduces maintenance costs and mitigates potential losses during disasters. The study advocates for a scientifically informed approach to aggregate sourcing, ensuring that construction practices meet engineering standards while promoting community safety and sustainability. Such measures can significantly enhance infrastructure resilience, minimizing disaster-induced disruptions and supporting long-term societal well-being.