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近年来,国外高强混凝土的研究十分活跃,应用十分广泛。50年代抗压强度为350kg/cm~2的混凝土则认为是高强的;60年代混凝土抗压强度为420～530kg/cm~2则认为是高强的;70年代初,生产的高强混凝土达630kg/cm~2,而现在可生产的高强混凝土达1100kg/cm~2以上,专家们正研究这种混凝土应用现浇结构和预应力混凝土构件。美国混凝土学会高强度混凝土363委员会规定:抗压强度在420kg/cm~2以上的混凝土称为高强混凝土,不包括聚合物混凝土、树脂混凝土、人造骨料混凝土、重混凝土
In recent years, research on foreign high-strength concrete has been very active and it has been widely applied. The concrete with compressive strength of 350kg/cm~2 in the 1950s is considered as high-strength; the compressive strength of concrete in the 1960s is 420~530kg/cm~2 and it is considered as high-strength; in the early 1970s, the production of high-strength concrete reached 630kg/ Cm~2, but now can produce high-strength concrete up to 1100kg/cm~2, the experts are studying this concrete application of cast-in-place structure and prestressed concrete components. The American Concrete Society’s 363 Committee on High-strength Concrete stipulates that concrete with compressive strength above 420kg/cm~2 is called high-strength concrete, excluding concrete, resin concrete, artificial aggregate concrete, and heavy concrete.