Title:
Repair of Concrete Surfaces Subjected
to Abrasionmerosion Damage: Case Histories
Author(s):
James E. McDonald and Tony C, Liu
Publication:
Concrete International
Volume:
2
Issue:
9
Appears on pages(s):
102-115
Keywords:
abrasion; abrasion resistant coatings;
cavitation; dams; erosion; hydraulics; hydraulic struc-tures;
models; repairs; spillways; wear. *
DOI:
Date:
9/1/1980
Abstract:
A variety of materials including armored concrete, conventional concrete, epoxy resins, fiber reinforced concrete, and polymer-impregnated concrete were used with varying degrees of success in the repair of erosion damaged structures. It appears that given appropriate flow conditions in the presence of debris, all of the materials are susceptible to some degree of erosion. No one material demonstrated a consistently superior performance advantage over alternate materials. Improvements in materials should reduce the rate of concrete damage due to erosion but will not solve the problem. Until the adverse hydraulic conditions that caused the original damage are minimized or eliminated, it will be extremely difficult for any of the materials currently being used in repair to perform in the desired manner. Prior to major repairs, model studies of the existing stilling basin and exit channel should be conducted to verify the cause(s) of erosion damage and to evaluate the effectiveness of various modifications in eliminating undesirable hydraulic conditions. [Authors]