RC Jacketing on RCC frame of Overhead water tank using results of Non Destructive Testing - A case study.

Abstract

A three storey RCC frame of an old overhead water tank in BITS Pilani campus had developed wide visible cracks, rusting of steel reinforcement and concrete spalling conditions at many locations. The condition of these structures was assessed by visual inspection, non-destructive testing (NDT) like rebound hammer, ultrasonic pulse velocities, rebar locator etc. and laboratory tests, to ascertain their suitability for further use. Based on the results of the tests conducted RC jacketing technique using anti corrosive agent, micro concrete and polymer modified mortar for retrofitting was suggested and implemented. The NDT was conducted again after the completion of retrofitting of the structure. This case study presents the use of standard and innovative repair materials, appropriate technology, workmanship, and quality control for successful repair, strengthening and restoration of damaged structures