Assessment of In-Situ Concrete Strength and Soil Bearing Capacity for the Redevelopment of an Abandoned RC Building in Plateau State, Nigeria

This study assessed the structural integrity of an abandoned one-storey reinforced concrete building in Tudun Wada, Jos North, Plateau State, Nigeria, proposed for redevelopment as a filling station and office complex. Non-destructive testing using the Schmidt Rebound Hammer was conducted on slabs, beams, and columns, with results indicating that most concrete elements exceeded the standard compressive strength of 25 N/mm². Visual inspections revealed significant structural deficiencies, including the absence of four external load-bearing columns, replaced by degraded hollow blocks, compromising structural stability. Geotechnical analysis of soil samples collected at 1.5 m depth showed safe bearing capacities ranging from 213.6 to 275.5 kN/m², confirming the adequacy of foundation support. While the concrete quality and subsoil conditions were generally satisfactory, the building’s compromised structural configuration demands urgent remedial engineering intervention. The study recommends strict adherence to construction standards, enhanced supervision, and the use of combined testing methods for reliable integrity assessments and future redevelopment decisions.