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[Xiao Xu’s note 53] according to the new concrete general specification, the strength of plain concrete components is not less than C20, so what about the cushion? Article 2.0.2-1 of the latest published general specification for concrete structures, the minimum grade of plain concrete [members] is C20, so does it include cushion? Because the cushion is not a component, the grade of cushion concrete in non corrosive environment may not be controlled according to this article.
How to choose the grade of cushion concrete in corrosive environment? For details, please refer to the site’s historical article [Xiao Xu’s note 33] no C15.
For the new concrete general specification, you can go to the “College of architectural one engineering”.
