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PREFACE:

Concrete is the most widely used material in the world. It plays an important role in infrastructure and private buildings construction. Understanding the basic behaviors of concrete is essential for civil engineering students to become civil engineering professionals. 

There have been some very good books regarding concrete, includingConcreteby Mindess, Young, and Darwin,Concrete: Structure, Properties, and Materials by Mehta and Monteriro, andConcrete Technologyby Neville and Brook. 

The motivation to write this book is to introduce new methodologies, new developments, and new innovations in concrete technology. The unique features of this book include the introduction of end use guided research strategy for concrete, unification of materials and structures studies, and an emphasize on fundamental exploration of concrete structures, state of art of concrete development, and innovations.

 This book provides more comprehensive knowledge on concrete technology, including the systematic introduction of concrete fracture mechanics and nondestructive evaluation for concrete engineering.

 The book is divided into nine chapters. Chapter 1 gives a brief introduction of concrete, including its historic development and advantages. Chapter 2 provides the knowledge of raw materials used for making concrete, covering aggregates, binders, admixtures, and water. Chapter 3 discusses the properties of fresh concrete, including workability and the corresponding measurement methods.

 Chapter 4 focuses on the structure of concrete at different scales, especially the calcium silicate hydrate at nanometer scale. Chapter 5 covers the properties of hardened concrete, including strength, durability, stress– strain relation, and dimension stability. Chapter 6 provides updated knowledge on various cement-based composites, including self-consolidation concrete, ultra-high-strength concrete, and extruded and engineered cementitious composites.

 Chapter 7 focuses the fracture behavior of concrete and provides the basic knowledge of fracture mechanics of concrete. Chapter 8 covers the essential knowledge of nondestructive testing of concrete engineering, including wave propagation theory in 1-D case, detecting principles of different NDT methodologies and techniques of different NDT methods. 

In Chapter 9, the issues regarding the future and development trend of concrete have been discussed. Although the book is designed and written primarily to meet the teaching needs for undergraduate students at senior level and graduate students at entry level, it can serve as a reference or a guide for professional engineers in their practice.

In the process of writing this book, the authors received enthusiastic help and invaluable assistance from many people, which is deeply appreciated. 

The authors would like to express his special thanks to Dr. Garrison C. K. Chau, Dr. Biwan Xu, and Dr. Jianzhong Shen for their help in editing the book draft. Mr. Mike Pomfret is acknowledged for his professional page proofreading.

 The photos provided by Profs. Wei Sun, Tongbo Sui, Linhai Han, and Zhen He; Drs. Xiaojian Gao, Herbert Zheng, and Jinyang Jiang; Mr. Peter Allen; and the companies of Ove Arup and Gammon are greatly appreciated. 

The support from China Basic Research Grant, Basic Research on Environmentally Friendly Contemporary Concrete (2009CB623200) is greatly acknowledged. Finally, I would like to thank for my wife, Xiuming Cui, my daughters Yexin Li and Aileen Li for their love, understanding, and support.