Author:
Bérubé Marc-André,Fournier Benoit
Abstract
The Sartigan dam, a concrete ice-retention dam built in 1967 along the Chaudière River, near Saint-Georges de Beauce, Quebec, Canada, shows numerous megascopic and microscopic signs of alkali–aggregate reactivity of the alkali–silica type (expansion, polygonal map cracking, silico-alkaline gels, looseness of cement paste – aggregate bonds, characteristic rims on fracture surfaces through coarse reactive aggregate particles, etc.). Besides, the three conditions considered as essential to promote these reactions in concrete have been satisfied in this case: the use of a high-alkali cement, conditions of high humidity reinforced by frequent wetting–drying cycles, and aggregates considered as potentially alkali-reactive in concrete (rhyolitic tuffs with a devitrified matrix rich in microcrystalline quartz).
Publisher
Canadian Science Publishing
Subject
General Environmental Science,Civil and Structural Engineering
Cited by
9 articles.
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