Evaluation and Repair of Concrete Navigation Structures

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Title: Evaluation and Repair of Concrete Navigation Structures

Author(s): J. E. McDonald and T. C. Liu

Publication: Special Publication

Volume: 109

Issue:

Appears on pages(s): 321-338

Keywords: admixtures; anchors (fasteners); concretes; deterioration; evaluation; grout; locks (waterways); pullout tests; repairs; spalling; underwater structures; General

Date: 8/1/1988

Abstract:
The U.S. Army Corps of Engineers currently operates and maintains 269 navigation lock chambers along inland and coastal waterways. Approximately one-half of these structures were built prior to 1940. Consequently, the concrete in these structures does not contain intentionally entrained air and is, therefore, susceptible to deterioration from cycles of freezing and thawing. In response to a need for improved technology in evaluation and repair of such structures, the Corps of Engineers initiated the Repair, Evaluation, Maintenance, and Rehabilitation (REMR) research program. The objective of this comprehensive program is to develop effective and affordable technology for prolonging the service life of existing civil works structures. Individual REMR research studies, which relate to the evaluation and repair of concrete in a marine environment, are described in this paper. Results to date indicate that techniques and equipment are available for underwater evaluation and repair of concrete structures without the necessity of dewatering.