Expert Answers » Hydroelectric Power
Hydroelectric Power Glossary Definition (English)
AAR Defined
The following is in context to Hydroelectric Power, because it's common for a single word to have multiple meanings you will find additional research links near the bottom of the page.
"A deterioration of concrete by which the alkali in the cement paste in the concrete reacts chemically with the silica or carbonate present in some aggregates- - - In the presence of free moisture, the gel (product of the reaction) will expand and manifest into cracking and differential movement in structures as well as other deleterious effects such as reduction in freeze-thaw durability and compressive and tensile strength- - - Three forms of alkali-aggregate reaction have been identified, see alkali-silica reaction, the slow/late-expanding type of reaction referred to as alkali-silicate reaction, and the alkali-carbonate reaction- - - Visit the Alkali-Aggregate Reactions database."
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