The study undertakes the comparative optimization by applying the double mixed and separated addition of mineral admixtures, designs the C45 high-performance concrete which is suitable for the pile foundation construction at Hong Kong-Zhuhai-Macao Bridge and meets the high durability, and finds the fluidity of the separated addition fly ash is better than the one of the double mixed fly ash and mineral powder, and it can meet the design demands for the durability and strength, so it can be applied at large-diameter pile foundation construction, so as to provide the technical support for the pile foundation construction at later period of constructing Hong Kong-Zhuhai-Macao Bridge.%分别应用了双掺、单掺矿物掺合料的对比优化,设计出适合港珠澳大桥桩基施工并满足高耐久性的C45高性能混凝土,通过现场施工,发现单掺粉煤灰配比流动性优于双掺粉煤灰、矿粉,耐久性、强度均满足设计要求,更适用于大直径桩基施工,为港珠澳大桥桩基后期施工提供了技术支持。
展开▼
