1 前言由于高性能混凝土所具有的高耐久性、高强度和高工作性,国际上已广泛认识到,用高性能混凝土来替代传统的混凝土,具有显著的经济效益。认为21世纪的混凝土,必将是高性能混凝土。近一二十年来高性能混凝土在国内、外有了较快发展。但是这些高性能混凝土建筑物都是高强(C50以上)和泵送的混凝土。而建筑中占绝大部分的是普通型塑性混凝土。这部 1 Introduction Due to the high durability, high strength and high workability of high-performance concrete, it has been widely recognized in the world that high-performance concrete can replace traditional concrete with obvious economic benefits. The twenty-first century concrete is bound to be high-performance concrete. Nearly a decade of high-performance concrete at home and abroad have enjoyed rapid development. However, these high performance concrete buildings are all high strength (C50) and pumped concrete. The majority of construction is ordinary plastic concrete. This part