大朝山电站拦河坝主体工程碾压混凝土施工中使用的FDN -0 4缓凝高效减水剂 ,通过设计优选 ,先后委托成勘院、南科院及武水等科研单位做了大量试验工作 ,推荐了设计配合比 ,并通过在 1号拌合平台、右岸重力墩、重力子堰、拱围堰等的施工及A渣场的再次工艺性试验 ,证明复合改性后的FDN -0 4外加剂满足了大朝山电站坝区特殊气候条件下大仓面碾压混凝土的施工技术要求 FDN-04 retarding superplasticizer used in the RCC construction of the Dachaoshan Hydropower Station main dam has been commissioned by a number of research institutes such as Prospecting Institute, Southern Academy of Sciences and Wushu to make a large number of experiments. The design mix was adopted and the reworking test on the construction site of No. 1 mixing platform, right bank gravity pier, gravity weir, arch cofferdam, and A slag yard proved that the composite modified FDN-04 admixture The construction requirements of Racoon RCC under the special climatic conditions of the Dachaoshan Hydropower Station dam area are met