Building Code Requirements for Structural Concrete and Commentary

CHAPTER 4—DURABILITY REQUIREMENTS .................................................................................... 55
4.1—General ......................................................................................................................................................................... 55
4.2—Exposure categories and classes ................................................................................................................................. 55
4.3—Requirements for concrete mixtures ............................................................................................................................. 57
4.4—Additional requirements for freezing-and-thawing exposure ......................................................................................... 60
4.5—Alternative cementitious materials for sulfate exposure ................................................................................................ 61
CHAPTER 5—CONCRETE QUALITY, MIXING, AND PLACING ......................................................... 63
5.1—General ......................................................................................................................................................................... 63
5.2—Selection of concrete proportions.................................................................................................................................. 64
5.3—Proportioning on the basis of field experience or trial mixtures, or both ....................................................................... 64
5.4—Proportioning without field experience or trial mixtures................................................................................................. 69
5.5—Average compressive strength reduction ...................................................................................................................... 69
5.6—Evaluation and acceptance of concrete ........................................................................................................................ 70
5.7—Preparation of equipment and place of deposit............................................................................................................. 75
5.8—Mixing............................................................................................................................................................................ 76
5.9—Conveying ..................................................................................................................................................................... 76
5.10—Depositing ................................................................................................................................................................... 77
5.11—Curing.......................................................................................................................................................................... 77
5.12—Cold weather requirements ......................................................................................................................................... 78
5.13—Hot weather requirements ........................................................................................................................................... 79