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概述高性能混凝土是以耐久性为主要目标进行设计的混凝土,它以优异的耐久性(而不是高强度)为主要特性,具备良好的工作性、又有优异的力学性能与耐久性,易于浇注、捣实而不离析;能长久保持的力学性能;高早期强度;体积稳定性。混凝土应具备的性能是:在新拌状态有良好的工作性,即高流动性而不离析、不泌水,以便成型均匀、密实;水化硬化早期的沉降收缩和水化收缩小、低温升,硬化过程低干缩,以达到无初始裂缝;硬化后的渗透性低,有高抗外部因素侵蚀能力。
Overview High performance concrete is designed for durability with the primary objective of being characterized by its excellent durability (not high strength), good workability, excellent mechanical properties and durability, and easy casting , Tamping without segregation; long-lasting mechanical properties; high early strength; volume stability. Concrete should have the performance is: a good working state in the new state, that is, high mobility without segregation, no bleeding, in order to shape uniform, dense; early hydration hardening settlement shrinkage and hydration shrinkage, low temperature rise , The shrinkage of the hardening process is low, so as to achieve no initial cracks; the permeability after hardening is low and the resistance to erosion by external factors is high.