C35桩基海工高性能混凝土配合比设计研究

Study on Mix Proportion Design of C35 Pile Foundation Marine High-Performance Concrete

当前我国所建设的基础设施中,桥梁占据着较大部分,在国民经济中发挥着较为重要的作用。对于桥梁结构而言,钢筋混凝土是其主要的施工材料,但在桥梁建设时混凝土结构常有缺陷存在。混凝土结构若在运营期若受到有害介质的入侵,将会导致其设计使用寿命受到较大的影响。为尽可能降低该种影响,本文以牛田洋特大桥为研究背景,针对其所处的复杂环境,开展了混凝土配合比进的设计优化。主要包括:从配合比设计的角度出发,采用正交设计的方法对混凝土的坍落度以及耐久性进行分析,在此基础上优选出混凝土的最优配合比,以期提高混凝土的设计使用寿命。

In the current infrastructure construction in China,bridges occupy a large part and play an important role in the national economy.For the bridge structure,reinforced concrete is the main construction material,but in the bridge construction,the concrete structure often has defects.If the concrete structure is invaded by harmful media during the operation period,its design service life will be greatly affected.In order to reduce this kind of influence as much as possible,this paper takes Niutianyang super large bridge as the background of the article,aiming at its complex environment,carries out the design optimization of concrete mix proportion.The research content mainly concentrates on the perspective of mix proportion design,and the method of orthogonal design used to analyze the slump and durability of concrete.The optimal mix proportion of concrete is optimized,so as to improve the design service life of concrete.