Contents 1 General provision 2 Terms and symbols 2.1 Terms 2.2 Symbols 3 General requirements 3.1 Principle of design 3.2 Environmental type and action grade 3.3 Design service life 3.4 Material requirements 3.5 Structure specification 3.6 Additional requirement for construction quality 4 General environment 4.1 General requirements 4.2 Environmental action grades 4.3 Thickness of material and protective layer 5 Freeze-thaw environment 5.1 General requirement 5.2 Environmental action grades 5.3 Thickness of material and protective layer 6 Chloride Environment 6.1 General requirements 6.2 Environmental action grades 6.3 Thickness of material and protective layer 7 Chemical corrosion environment 7.1 General requirement 7.2 Environmental action grades 7.3 Thickness of material and protective layer 8 Post-tensioning prestressed concrete structure 8.1 General requirements 8.2 Protection of prestressing tendons 8.3 Anchored end protection 8.4 Additional requirement for structure and construction quality Appendix A Durability Limit State of Concrete Structure Design Appendix B Adoption of the Concrete Raw Material Appendix C Air Content and Void Spacing Factor of Air-entrained Concrete Appendix D Measuring Methods for Durability Parameter of Concrete Durability Parameter and Corrosive Ion Explanation of Wording in this code
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