提高东海大桥混凝土结构耐久性的措施

Measures to Improve Durability of Concrete Structures of Donghai Bridge

东海大桥是我国较为罕见的大型海洋工程。影响东海大桥结构混凝土耐久性的首要因素是Cl-在混凝土中的渗透性。针对这一情况,并考虑当地实际,提出采取高性能混凝土技术为核心的综合耐久性策略,及满足现阶段工程实际和技术水平的施工措施和质量保证措施,确保了高性能混凝土质量符合耐久性设计要求。

Donghai Bridge is a large maritime project rarely seen in China. The primary factor affecting the durability of structural concrete in Donghai Bridge is the permeability of Clˉ in concrete. Based on the problem and taking into consideration the local conditions, the paper proposed an integrative durability strategy centering on the high performance concrete technique and, by taking construction measures to meet the requirements of engineering practice at the time and the technological level and the quality assurance measures, the quality of the high performance concrete was ensured to meet the requirements of the durability designs.