Saravanan, K. and Srinivasan, S. and Kapali, V. and Nayak, N.U. and Sureshbapu, R.H. and Madhavamayandi, A. and Kalyanasundaram, R.M. and Rengaswamy, N.S. and Balakrishnan, K.
(1996)
Non-destructive examination of corroded concrete structures using radiography.
Bulletin of Electrochemistry, 12 (01).
08-10.
ISSN 0256-1654
Abstract
Concrete deterioration and reinforcement corrosion occur due to many reasons. These two factors weaken the structural strength and result in the premature failure of the structures situated in aggressive environments. The condition of the concrete as well as rebar embedded in it has to be assessed before taking up any remedial or repair strategy. Several electrochemical non-destructive techniques are available for this purpose. Some of them lead to indirect conclusions and some lead to partial quantification of corrosion. Radiographic technique is one of the promising non-destructive methods for determining the porosity of concrete, voids in the cement grout, rusting of mild steel, rusting of prestressing steel and snapping of prestressing wires. Laboratory and field experiments were carried out on model slabs, beams and concrete structures to study the various aspects of concrete corrosion. A 6 MeV high energy X-ray equipment was used for this purpose. Concrete thickness upto 30 cm was radiographed. Suitable safety measures were undertaken while carrying out the above work. The data obtained during this radiographic work and the X-ray photographs were analysed as per requisities of photogrammetric data analysis and results are presented in this paper. This pioneering work has yielded very interesting and useful results regarding the quality of concrete and grouting, condition of prestressing wires and other non-prestressed steel
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