The alkali-aggregate reaction (AAR) is that alkali ions from cement orenvironment react with reactive constituents of aggregates to form expansivematerials that produce expansive stress resulting in expansion or cracking of concretestructures.

• 碱-集料反应(Alkali-Aggregate Reaction, AAR)是指混凝土中的碱与集料中的碱活性成分发生化学反应,生成膨胀物质使混凝土内部产生自膨胀应力,造成混凝土开裂破坏,从而大大缩短混凝土建筑物的使用寿命,预防和抑制碱-集料反应是国内外混凝土界研究的重要领域之一。