Title:
Erosion Resistance With Silica-Fume Concrete
Author(s):
Terence C. Holland and Richard A. Gutschow
Publication:
Concrete International
Volume:
9
Issue:
3
Appears on pages(s):
32-40
Keywords:
abrasion resistance; channels (waterways); damage; dams; erosion; high-strength concretes; repairs; silica; stilling basins; Materials Research
DOI:
Date:
3/1/1987
Abstract:
The stilling basin of the Kinzua Dam on the Allegheny River in western Pennsylvania and the low flow channel of the Los Angeles River in southern California are two concrete structures that have experienced severe abrasion-erosion damage. Laboratory studies were performed to evaluate several concrete mixtures that were being considered for repairs on these structures. These investigations showed that high-strength concrete, made with silica fume and local aggregates, would provide the greatest abrasion-erosion resistance for the structures at a cost-effective price. Based on these results, silica-fume concrete was used for the repairs on both structures. Inspection of the Kinzua Dam stilling basin has indicated that the concrete is performing as intended. Because of the nature of the abrasion-erosion-causing mechanism, performance evaluation of the concrete placed in the Los Angeles River low flow channel will require a longer time.