Hiwassee Dam rehabilitation to combat concrete growth
Conference
·
OSTI ID:220032
- Tennessee Valley Authority, Chattanooga, TN (United States)
Hiwassee Dam is experiencing concrete growth caused by alkali-aggregate reaction (AAR). The AAR is the alkali-silica tape associated with excessive alkali in the cement and a micaceous quartzite (siliceous) aggregate used in the concrete. Concrete growth at Hiwassee Dam caused by this reaction has resulted in high stresses and deflections within the dam. These stresses and deflections have caused the nonoverflow blocks to deflect into the spillway openings causing the spillway gates to bind. This growth has also caused the spillway bridge expansion joints to close, and structural cracking in the upper portion of the dam. This is a continuation of the paper that was presented at the International conference on Hydropower {open_quotes}WATERPOWER `93{close_quotes} entitled {open_quotes}MODIFICATION AT HIWASSEE DAM DUE TO CONCRETE GROWTH PROBLEMS{close_quotes} Volume 2, page 860 to 869. It presents: The rehabilitation to date, the instrumentation that has been installed to monitor the rehabilitation, and the results of these efforts.
- OSTI ID:
- 220032
- Report Number(s):
- CONF-9507190--
- Country of Publication:
- United States
- Language:
- English
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