Foreword

This standard is made according to the requirement of Notice on Complementarity Plan of Industrial Standards in 2003（Document No.873，2003）issued by the National Development and Reform Commission.

This standard is prepared in light of the characteristics of hydraulic concrete by summarizing the research results and advanced experiences of hydraulic concrete durability in the past 20 years at home and abroad，and by referencing relevant Chinese and other country standards.

The standard highlights the durability design of hydraulic concrete，construction techniques，quality assessment and related technical measures.The main contents include freezing and thawing action，surrounding water erosion，abrasion and cavitation，reinforcement corrosion，alkali-aggregate reaction，etc.

Appendix A is normative.

This standard was proposed by China Electricity Council.

This standard is under the jurisdiction and explanation of the Technical Committee of Standardization for Hydropower Construction of Electric Power Industry.

Main drafting organization:

　　　　　　Nanjing Hydraulic Research Institute and China Institute of Water Resources and

　　　　　　Hydropower Research

Main drafters:

　　　　　　Cai Yuebo　Chen Gaixin　Ding Jiantong　Lin Baoyu　Ma Fengling

　　　　　　Ji Guojin　Hu Zhinong

Translated and examined by Sinohydro Corporation:

　　　　　　Zong Dunfeng　Xu Songling　Wang Yi　Chu Yuexian　Hou Yujing　Li Shisen

　　　　　　Cheng Jiansu　Wang Jinting　Yan Fuzhang　Kang Minghua　Li Jingshuang