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C50以上高标号混凝土在大跨径桥梁结构中广泛采用。C50混凝土在配合比设计、施工、养护等阶段的工艺质量控制非常关键,本文就湛江市东海跨海大桥第三合同标段,C50混凝土后张法预制箱梁施工工艺情况(坍落度为120±20mm,5天要求达到设计强度的100%,即28d强度将近为C65砼),阐述了如何使用P.Ⅱ42.5鱼峰水泥浇筑C50混凝土箱梁的质量控制技术。
C50 above the high-grade concrete in the long-span bridge structure is widely used. C50 concrete in the mix design, construction, conservation and other stages of process quality control is critical, this article on the East China Sea Bridge in Zhanjiang third contract tenders, C50 concrete post-tensioned precast box girder construction process conditions (slump was 120 ± 20mm, 5 days required to reach 100% of the design strength, that is, the strength of 28d is nearly C65 concrete), elaborated on how to use P. Ⅱ 42.5 Yuteng cement pouring C50 concrete box girder quality control technology.