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Title: An investigation of concrete condition, William Bacon Oliver lock and spillway
Authors: United States. Army. Corps of Engineers. Mobile District.
McDonald, J. E. (James E.)
Campbell, Roy L., 1942-
Keywords: Condition survey
Navigation locks
Overflow spillway
Concrete deterioration
Alkali-aggregate reactions
Concrete cracking
Repair and rehabilitation
Publisher: Concrete Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Miscellaneous paper (U.S. Army Engineer Waterways Experiment Station) ; C-77-5.
Description: Miscellaneous paper
Abstract: This report presents the results of an investigation to assess the condition of the concrete in William Bacon Oliver Lock and Spillway on the Warrior- Tombigbee Waterway near Tuscaloosa, AL. The investigation included (l)crack survey of lock walls, (2) soniscope investigation of lock and spillway, (3) examination and tests of concrete and foundation cores to determine material properties, (4) stress analysis of the upper land wall gate monolith, and (5) comparison of results with previous work on the structure. Results indicate the concrete, despite extensive cracking in some monoliths: containing the higher-alkali cement, is of generally good quality. Although the concrete still has the potential for internal growth and expansion due to alkali-silica reaction, any increases in cracking in recent years is more likely attributed to physical deterioration, such as freezing and thawing, than to the direct effects of continued alkali-silica reaction. In situ pulse velocity data obtained during the period 1948-1976 indicate that, of the monoliths tested, only the concrete in Monolith Nos. 16 and 20 would be classified as questionable. However, the same data indicate that the concrete in these monoliths is not experiencing progressive deterioration; in fact, the trend is for increased pulse velocities since tests were initiated. Similarly, a comparison between current surface cracking and monolith displacements and that present in 1948 indicates that present conditions are not significantly different from those at the time of the initial investigation. Results of the material property tests indicate the current concrete quality to be generally good and substantially unchanged from the initial investigation in 1948. This tends to alleviate the concern regarding the effect of reduced concrete strengths on the magnitude and location of stress concentrations within gate wonoliths. Extensive repairs and/or rehabilitation of the structure do not appear necessary at present. For specific areas identified through continuing periodic inspections as requiring maintenance, removal of approximately 1-3 ft of surface concrete and replacement with new concrete is recommended. Note: This is an extremely large file. Allow additional minutes for downloading.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Miscellaneous Paper

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