Ultra-High Performance Concrete Jacketing with Local Aggregates for Axial Strengthening of Reinforced Concrete Columns

Mardiana Oesman, Satrio Harry

Abstract


This study investigates the axial load performance of reinforced concrete (RC) columns strengthened with ultra-high-performance concrete (UHPC) jacketing incorporating locally sourced coarse aggregate. Four column specimens were tested, with variations in core concrete strength (20 MPa and 35 MPa) and jacketing material (normal concrete and UHPC). Monotonic axial compression tests were performed to evaluate load-bearing capacity, stiffness, ductility, energy absorption, and toughness. At 90 days, compressive strengths were 24.32 MPa for the 20 MPa concrete, 46.95 MPa for the 35 MPa concrete, and 80.06 MPa for the UHPC. Results demonstrate that UHPC jacketing significantly improved axial performance compared to normal concrete, particularly in terms of maximum load, stiffness, and toughness. However, higher-strength cores exhibited slightly reduced ductility. The findings underscore the potential of UHPC with coarse aggregate as a cost-effective strengthening material for existing RC columns, offering practical guidance for retrofitting strategies in developing countries.

Keywords


Axial compression; coarse aggregate; jacketing; RC column; strengthening; UHPC

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References


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DOI: http://dx.doi.org/10.30659/jacee.8.2.22-31

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JACEE (Journal of Advanced Civil and Environmental Engineering) was established to meet the need for dissemination of research results, critical reviews, and quality analysis. JACEE invites and welcomes the submission of advanced research and review papers, innovations and developed selected conference papers that have never been previously publicized. This journal provides publications and a forum to the academics, scholars and advanced level students for exchanging significant information and productive ideas associated with all these disciplines. It is published by Fakultas Teknik Universitas Islam Sultan Agung, Indonesia, in collaboration with Fédération Internationale du Béton twice a year in April and October.