一、高性能混凝土(HPC)的定义 1990年5月由美国国家标准局和混凝土学会主办的讨论会上把HPC定义为具有所要求的性质和匀质性的混凝土,而靠用传统的组份、普通的拌合、浇筑与养护方法不可能制备出这种混凝土。这些性能包括:易于浇筑、捣实而不离析,高超的能长期保持的力学性能;高早期强度,高韧性;体积稳定;在严酷环境中的使用寿命长。 I. Definition of High Performance Concrete (HPC) HPC was defined as a concrete with the required properties and homogeneity in a seminar sponsored by the National Bureau of Standards and the Concrete Institute in May 1990, while relying on traditional components. It is impossible to prepare such concrete by ordinary mixing, pouring and curing methods. These properties include: easy pouring, compaction without segregation, superior long-term retention of mechanical properties; high early strength, high toughness; volume stability; long service life in harsh environments.