Modifications to Hiwassee Dam and planned modification to Fontana and Chickamauga Dams by the Tennessee Valley Authority to manage alkali-aggregate reaction
- Tennessee Valley Authority, Chattanooga, TN (United States)
Large concrete members usually decrease in volume as their temperature drops from that achieved during hydration to that imposed during service. Small concrete members usually decrease in volume because of drying shrinkage. Most concrete structures are designed and detailed to provide for a volume decrease without excessive cracking, Occasionally concrete growth is exhibited in a concrete structure. Growth may result from a variety of reactions, such as the oxidation of minerals, the hydration of unstable oxides included in the concrete mix, or from an outside attack of sulphates. The most important reaction creating concrete growth is probably the reaction between minor alkali (Na{sub 2}O and K{sub 2}O) hydroxides from cement and the concrete aggregates.
- OSTI ID:
- 192156
- Report Number(s):
- CONF-9510182-; TRN: 95:008180-0007
- Resource Relation:
- Conference: 2. international conference on alkali-aggregate reactions in hydroelectric plants and dams, Chattanooga, TN (United States), 22-27 Oct 1995; Other Information: PBD: 1995; Related Information: Is Part Of Second international conference on alkali-aggregate reactions in hydroelectric plants and dams; PB: 548 p.
- Country of Publication:
- United States
- Language:
- English
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