Radiographic examination of prestressed concrete box girder bridges

Application of high energy x-radiography, using Betatron equipment to the box girders of prestressed concrete bridges, was conducted for the first time in India. The web thickness of the concrete box girders varied from 300 to 450 mm. Stringent safety measures were observed. The study gave information on the quality of the concrete, grout, and tensioned and untensioned steels.