Investigation of in-situ strength of concrete in an old concrete dam for its repair and maintenance

M Raja, S K Dwivedi, U S Vidyarthi, C.B.Sarma

Ultrasonic Pulse Velocity (UPV), Compressive Strength, Density

This paper presents the concrete condition assessment of an inspection gallery, access gallery, and drainage gallery of old dam. Minor degradation and water seepage were observed in a few places of galleries, particularly from the top surfaces of the galleries. This investigation was carried out to obtain the concrete properties needed to assess the strength and quality of concrete. The method of evaluation of the strength of the old dam is carried out by using ultrasonic pulse velocity (UPV) measurements and core compressive strength. The gallery concrete surface was recommended for repair and waterproofing based on the results.