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为获得梅溪河特大桥主梁所需C60高性能混凝土高早期强度、高韧性;体积稳定;在严酷环境中的使用寿命长等特性,根据所选用材料的技术指标和配合比设计原则,文章通过对原材料和混凝土性能的分析,对大桥主梁的C60混凝土配合比进行设计,采用聚羧酸系高性能减水剂,以粉煤灰为辅助胶凝材料,实现了高性能混凝土工作性能、强度、收缩裂缝等指标,满足了设计要求。
In order to obtain the high early strength and high toughness of C60 high-performance concrete required for the main girder of Meixi River Super-Large Bridge, the characteristics of volume stability, long service life in harsh environment and the like, according to the technical indexes and mix design principles of selected materials, Through the analysis of the properties of raw materials and concrete, the proportion of C60 concrete in the main girder of the bridge was designed. The polycarboxylate superplasticizer and fly ash as the auxiliary cementing material were used to achieve the performance of high performance concrete. Strength, shrinkage cracks and other indicators to meet the design requirements.