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Title: Abrasion-erosion evaluation of concrete mixtures for stilling basin repairs, Kinzua Dam, Pennsylvania
Authors: United States. Army. Corps of Engineers. Pittsburgh District.
Holland, Terence C.
Keywords: Abrasion-erosion resistance
Concrete aggregates
Concrete properties
Kinzua Dam
Allegheny River
Silica-fume concrete
Publisher: Structures Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Miscellaneous paper (U.S. Army Engineer Waterways Experiment Station) ; SL-83-16.
Description: Miscellaneous Paper
Abstract: The resistance to abrasion-erosion of several concretes made with different coarse aggregates, with and without silica fume as a mineral admixture, was evaluated. Testing was done in accordance with the Corps of Engineers standard test method. Initially, concretes made with a limestone coarse aggregate (available near the project site) and with two gabbros (from New York and Virginia) were prepared and tested. Although the gabbros were thought to be harder than the limestone, testing revealed very little difference in abrasion-erosion resistance among the three aggregates. The two gabbros did not show a great enough improvement to justify the increased transportation costs necessary for their use. A polymer portland-cement concrete (epoxy-modified concrete) was also prepared using the limestone aggregate. This material showed very little improvement in abrasion-erosion resistance -- certainly not enough improvement to justify the high cost of the epoxy product. High strength concretes (fc' ~ 7500 psi) made using the limestone aggregate and one of the gabbros and containing silica fume and a high-range water-reducing admixture showed improved abrasion resistance. Very high strength silica-fume concretes (fc' = 14,000 psi) showed excellent abrasion-erosion resistance. Cores taken from the fiber-reinforced concrete overlay presently in the Kinzua stilling basin were also tested. The cores showed very high abrasion losses, which agrees well with the apparent poor performance of the material in the prototype. Recommendations were made that either a source of coarse aggregate with better abrasion-erosion resistance be located for use or the use of the very high strength silica-fume concrete be evaluated further.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Miscellaneous Paper

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