港珠澳大桥长寿命海工高性能混凝土配制

Preparation of long-service-life marine high-performance concrete for Hong Kong-Zhuhai-Macao bridge

针对120 a设计使用年限要求,阐述港珠澳大桥不同主体结构海工高性能混凝土基本性能设计的原则。在暴露试验得出的混凝土长期耐久性影响因素的基础上,系统研究配合比参数对混凝土性能的影响,介绍满足桥梁、隧道等不同结构工作性、强度、耐久性及体积稳定性要求的长寿命海工高性能混凝土的配制基本思路与方法。

For the 120-year design service life, we expound the principle of basic performance design of marine high-performance concrete for main structures of the Hong Kong-Zhuhai-Macao bridge. Based on the influencing factors of concrete long time durability of exposure test, we study systematically the influence of parameters of mix proportion on the properties of concrete. The ideas and methods of preparation of long service life marine high-performance concrete which satisfies the requirements of workability, strength, durability and volume stability for different structures of bridges and tunnels are presented.