National Research Council of Canada

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  • White Papers // Jun 2002

    Preventing Concrete Deterioration Due to Alkali-Aggregate Reaction

    Alkali-aggregate reaction is a chemical reaction between certain types of aggregates and hydroxyl ions (OH-) associated with alkalis in the cement. Usually, the alkalis come from the portland cement but they may also come from other ingredients in the concrete or from the environment. Under some conditions, the reaction may...

    Provided By National Research Council of Canada

  • White Papers // Jun 2002

    Preventing Concrete Deterioration Due to Alkali-Aggregate Reaction

    Alkali-aggregate reaction is a chemical reaction between certain types of aggregates and hydroxyl ions (OH-) associated with alkalis in the cement. Usually, the alkalis come from the portland cement but they may also come from other ingredients in the concrete or from the environment. Under some conditions, the reaction may...

    Provided By National Research Council of Canada