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高强混凝土一般是指强度等级在C45及其以上的混凝土,但目前国内外作为新技术考虑的高强混凝土是指抗压强度在60MPa以上的混凝土。 高强混凝土一般具有比较低的水灰比,这种低水灰比的混凝土早在60年代就在我国有过研究和试点,但由于混凝土在低水灰比的情况下,工作性能很差,成型和捣实比较困难,不利于推广。因此,现代高强混凝土的首要技术关键就是要采用高性能的外加剂来改善混凝土拌合物的工作性能。尤其混凝土
High-strength concrete generally refers to concrete with a strength grade of C45 or higher. However, high-strength concrete considered as a new technology at home and abroad refers to concrete with a compressive strength of 60 MPa or more. High-strength concrete generally has a relatively low water-cement ratio. Such concrete with low water-cement ratio was studied and piloted in China as early as the 1960s, but due to the poor performance of the concrete in the case of low water-cement ratio, forming It is more difficult to be realistic and is not conducive to promotion. Therefore, the key technology of modern high-strength concrete is to use high-performance additives to improve the performance of concrete mixes. Concrete in particular