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Title: Condition survey, repair and rehabilitation, Lock and Dam No. 24, Mississippi River
Authors: United States. Army. Corps of Engineers. St. Louis District.
Stowe, Richard L.
Thornton, Henry T.
Keywords: Concrete dams
Hydraulic structures
Concrete deterioration
Laboratory tests
Lock and Dam No. 24
Mississippi River
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-81-21.
Description: Miscellaneous Paper
Abstract: A condition survey of the concrete was performed at Lock and Dam No. 24 on the Mississippi River. Field studies indicated that 32 percent of the concrete bridge support columns are moderately to severely deteriorated, 48 percent are slightly deteriorated, and 20 percent show no sign of damage. A small zone of concrete downstream of the trunnion shafts is severely deteriorated. Cores were recovered from areas representative of the different degrees of damaged concrete and examined and tested in the laboratory. Some of the cores were extensively damaged by cycles of freezing and thawing to depths of 2 ft. Compressive strengths of the cores ranged from 2010 to 9770 psi. The minimum remaining compressive strength in the columns is estimated at 1000 psi. Techniques for removal and repair of damaged concrete are recommended. Removal of concrete by water jet is suggested.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Miscellaneous Paper

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