Hydrodemolition is the use of a high pressure water-jet to remove concrete. It is a new
method of concrete removal which is becoming increasing specified by state Departments of
Transportation for bridge rehabilitation work. The technical, financial and contrnctual aspects
of using hydrodemolition are examined and a brief explanation of salt induced concrete
deteriorntion in bridges is presented.
Interviews were conducted with state DOT engineers, general contrnctors, specialty
hydrodemolition subcontractors and hydrodemolition equipment manufacturers. These
interviews identified problems encountered with using hydrodemolition. Possible solutions to
these problems are presented. These possible solutions are based on both suggestions made by
the persons interviewed and the author.