Title: Vesuvius Dam Spillway: A Base History of Concrete Performance, Failure, and Repair

Author(s): G. T. Coghlan and A. Vanderpoel

Publication: Concrete International

Volume: 2

Issue: 5

Appears on pages(s): 42-44

Keywords: dams; deterioration; failure; performance; reinforced concrete; repair; shotcrete; specifications; spillways.

DOI:

Date: 5/1/1980

Abstract:
The Vesuvius Dam concrete spillway experienced progressive deterioration. Completed in 1939, minor repairs were made in 1949, 1955, and 1964. Cracking, spalling, raveling of rock pockets, and efflorescence continued. In 1977, it was determined that repairs were needed to preserve the structural integrity. An end-product specification was prepared permitting prospective contractor to propose the re and method. The low bidder proposed mixed pneumatically applied mortar or Quality, economical repair of the spillway ed using the shotcrete. Smooth finish of repairs I than 3 ft (1 m) square indicated the need for removal and minimum form work. A final cleanin preservative surface treatment of linseed somewhat emphasized the repair areas. Where face treatments are intended for cosmetic effec well as weather proofing, trial applications might establish an effective application rate.