Influence Of Natural Aggregates Replacement With Recycled Aggregate On Strength And Sulphate Resistance Of M50 Grade Concrete

Abstract

The Rapid Expansion Of Global Infrastructure Has Led To An Unprecedented Demand For Natural Construction Materials, Necessitating The Exploration Of Sustainable Alternatives. This Research Investigates The Feasibility Of Replacing Natural Coarse Aggregates With Manually Crushed Recycled Concrete Aggregates (RCA) In High-strength M50 Grade Concrete. A Primary Challenge Addressed In This Study Is The Presence Of Adhered Mortar On The Surface Of Recycled Aggregates, Which Significantly Influences Concrete Performance. The Experimental Program Involved Characterizing The Physical Properties Of Recycled Aggregates, Specifically Quantifying The Average Adhered Mortar Content. A Comprehensive Mix Design For M50 Grade Concrete Was Developed, And An Optimum Replacement Ratio Was Determined. The Mechanical Performance Was Evaluated Through Compressive Strength Testing Of Both Natural And Recycled Aggregate Concrete Under Normal Water Curing Conditions. Furthermore, The Study Explores The Effect Of Recycled Aggregate Utilization On Durability By Assessing The Concrete's Resistance To Sulphate Attack. The Findings Provide Critical Insights Into The Viability Of Incorporating Recycled Aggregates Into High-performance Concrete, Offering A Pathway Toward More Sustainable Construction Practices By Mitigating The Reliance On Virgin Natural Resources.

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