目前,一般称600号以上的为高强混凝土,1000号以上的为超高强混凝土。根据一般分析,当用800号混凝土代替400号混凝土生产构件时,在一定范围内构件的承载能力可提高一倍,自重可减轻25%,而造价仅增加50%。因之,各国都在不断提高混凝土的平均标号和使用的最高强度。为达到高强,各国采取的措施不一。有的采用减水 At present, high-strength concrete is generally referred to as No. 600 or more, and ultra-high-strength concrete is used as No. 1000 or above. According to the general analysis, when No. 400 concrete is used instead of No. 400 concrete production components, the load carrying capacity of the components can be doubled within a certain range, the weight can be reduced by 25%, and the cost is increased by only 50%. As a result, all countries are constantly increasing the average number of concrete markings and the highest intensity of use. In order to achieve high strength, different countries have taken different measures. Some use reduced water