本文从物理约束、表面隔水和碱转移三方面研究了老混凝土工程碱集料反应(AAR)的防治措施。研究表明,对含AAR的混凝土棱柱体施加预压应力可减小AAR裂纹;采用有机硅和甲基丙烯酸甲酯对混凝土表层与表面进行适当处理,可在一定程度上抑制AAR;一定浓度的LiOH溶液可有效地抑制AAR;硅溶胶也能降低AAR膨胀,缓和AAR破坏。 In this paper, the prevention and treatment measures of the alkali-aggregate reaction (AAR) in the old concrete works are studied from the aspects of physical constraints, surface water barrier and alkali transfer. Studies have shown that the application of precompressive stress to concrete prisms containing AAR can reduce AAR cracks; the use of organic silicon and methyl methacrylate to treat the surface and surface of concrete properly can inhibit AAR to some extent; certain concentrations of LiOH The solution can effectively inhibit AAR; the silica sol can also reduce AAR swelling and mitigate AAR damage.