三峡工程大坝混凝土的配合比优化设计试验研究  

Study on optimization-proportioning of dam-concrete in Three Gorges Project

作　　者：杨华全[1] 王迎春[1] 李家正[1] 王仲华[1] 

机构地区：[1]长江科学院,湖北武汉430010

出　　处：《混凝土》2002年第11期29-33,共5页Concrete

摘　　要：　三峡工程大坝混凝土工程量十分巨大,为了节约水泥,改善混凝土的性能,特别是提高混凝土的耐久性,在混凝土配合比设计时采取了选用品质优良的高效缓凝减水剂、全面掺用引气剂、掺用优质粉煤灰等技术措施,探讨了水胶比、粉煤灰掺量对混凝土的单位用水量、抗压强度、抗拉强度、抗冻性能的影响规律,使优化的大坝混凝土配合比具有单位用水量小、水泥用量少、耐久性好等特点。For saving cement,improving the performance of concrete,specifically its durability,some technological measure including selecting high quality retarding and waterreducing agent,mixing with the addition of AE agent and first grade flyash are employed in the mix design of concrete.The influence of water/cement rations and flyash admixed quantities on the unit water,stregths and freezethaw resistance are studied.According to experimental results,it is concluded that the mix proportion of dam concrete achieved all design requirements with less water content,less cement content and more excellent durability.

关 键 词：三峡工程 大坝 混凝土 配合比 优化设计 试验 粉煤灰 耐久性 引气剂 抗压强度 

分 类 号：TV431[水利工程—水工结构工程]