本文针对威海某工程的梁板加固处理实例,研究了免振自密实高性能微膨胀混凝土的材料选择、施工方法及注意事项。提出了配合比设计原则,并通过试验试配确定了施工配合比,并成功应用于该工程。 In this paper, a case study of Weihai a beam reinforcement works, the study of the material selection, construction methods and precautions of self-compacting high performance micro-expansive concrete. Proposed the design principle of mix proportion, and determined the mix ratio of construction through trial test, which was successfully applied to the project.