Durability performance of recycled coarse aggregate as partial replacement of coarse aggregate in concrete

Author(s)	Mr. Jajula. Bala Krishna, Ms. Yellinedi Madhavi, Dr. Bypaneni Krishna Chaitanya
Country	India
Abstract	This study explores the use of recycled coarse aggregates (RCA) in concrete, replacing natural coarse aggregates (NCA) at 12.5%, 25%, and 50% levels. Ordinary Portland Cement (OPC) was partially substituted with fly ash for sustainability. Concrete mixes were designed following IS 10262:2019, and a super plasticizer was added to maintain workability despite RCA’s higher water absorption. Mechanical properties such as compressive strength, water absorption, sorptivity, pull-out strength, and rapid chloride penetration were tested. Results showed that upto 25% RCA improved compressive strength, water absorption, and chloride resistance. However, at 50% RCA, performance decreased due to higher porosity and weaker aggregates. The study highlights the potential of using RCA as a sustainable material in concrete, with optimal performance achieved with up to 25% replacement.
Keywords	super plasticizer, RCA, durability, sorptivity, sustainable concrete
Field	Physics > Civil Engineering
Published In	Volume 7, Issue 3, May-June 2025
Published On	2025-06-25
DOI	https://doi.org/10.36948/ijfmr.2025.v07i03.49095
Short DOI	https://doi.org/g9rsmm

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