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芝加哥设计人员同予拌工业密切配合,推广了许多新型产品,高强混凝土就是其中之一。所谓高强混凝土,只是相对而言,它是根据地区资源和材料的最大利用来决定的。在芝加哥地区,高强混凝土是指56天抗压强度为410kg/cm~2—760 kg/cm~2之间的普通混凝土和56天抗压强度为350—550kg/cm~2的轻混凝土。这篇文章中提供的资料只涉及620 kg/cm~2的普通混凝土,这种混凝土自1972年用于高层建筑的柱子以
Chicago designers worked closely with the mixing industry and promoted many new products, including high-strength concrete. The so-called high-strength concrete is only relatively speaking, it is determined according to the maximum utilization of regional resources and materials. In the Chicago area, high-strength concrete refers to ordinary concrete with a compressive strength between 410 kg/cm2 and 760 kg/cm2 for 56 days and light concrete with a compressive strength of 350-550 kg/cm2 for 56 days. The information provided in this article only refers to ordinary concrete of 620 kg/cm2. This concrete has been used as a pillar for high-rise buildings since 1972.