混凝土碱-骨料反应是导致水泥混凝土结构产生病害的一种有害反应。论述了碱-骨料反应的特征及影响因素。通过对实际工程的观测、调查、钻探取样及化验分析，详细剖析了混凝土碱-骨料反应的机理和过程。最后对碱-骨料反应的预防提出了建议。

The alkaliaggregate reaction in concrete is one of the adverse reactions that result in the diseases of the structures of cement concrete. The article expatiates on the features and influence factors of the alkaliaggregate reactions. On basis of observations, investigations, core drillings and chemical tests of the engineering case, the article makes detailed analysis on the mechanisms and processes of the alkaliaggregate reactions in concrete. Finally, the article provides some recommendations for the prevention of the alkaliaggregate reactions in concrete.