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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Construction Joint Clean-Up Method at Shasta Dam
Author(s): C. S. Rippon
Publication: Journal Proceedings
Appears on pages(s): 293-304
Abstract:Specifications for Shasta Dam and Power Plant on the Sacramento River near Redding, Calif., incorporated a new method for treatment of horizontal construction joints. The method required a 2-in. cov- ering of moist sand spread on the concrete as soon as the surface had hardened sufficiently to withstand the necessary traffic. Clean-up required before the placement of the next concrete lift consisted of removing the wet sand, which also served as a curing medium, and washing with high velocity air-water jets. This method was abandoned after 9 months’ operation because of high cost of handling the sand and interruption of concrete placement schedules by use of hi-lines to distribute sand. After abandoning the sand method, all joints were cured with water sprays and wet sand blasted just prior to placement of the next concrete lift.
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