Abstract
The ACI code and ASTM specifications draw a clear road map on how to assess the deterioration of existing concrete structures. Yet, imperfect application of the road map and testing procedures may result in confused, inaccurate and costly outcomes. This field study covered a procedural assessment of an existing concrete structure starting with visual inspection of visible defects, followed by field tests including `Schmidt Rebound Hammer', 'Ultrasonic Pulse Velocity' and 'Half-Cell Potential' tests. In addition, laboratory tests are conducted to find sulphate and chloride contents, pH value and the concrete compressive strength. The aim of this study is to confirm the feasibility of combining different field tests with minimum laboratory ones by evaluating a construction halted facility for ten years located at Al-Nahrain University in Iraq. In which a wide range of random samples of reinforced concrete columns, beams, slabs and shear walls are assessed. Based on ACI 437R-19, the results of nondestructive tests are correlated to the results of core tests extracted from the same structure. This approach is found to be satisfactory in assessing the whole structure condition. Repair and strengthening techniques are also suggested. (C) 2021 Elsevier Ltd. All rights reserved.