This report is a companion document to ACI 210R. It contains a series of case histories on hydraulic structures that have been damaged by erosion from various physical, mechanical, and chemical actions. Many of these structures have been successfully repaired. There were many examples to select from: however, the committee has selected recent, typical projects, with differing repair techniques, to provide a broad range of current experience.
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These case histories cover only damage to the hydraulic surfaces due to the action of water, waterborne material, or chemical attack of concrete from fluids conveyed along the hydraulic passages. In addition to repairs of the damaged concrete, remedial work minimizes the action that produced the damage. This report does not cover repair of concrete damaged by other environmental factors such as freeze-thaw, expansive aggregate, or corroding reinforcement.