ACI 311.6-09

This Reference Specification covers Testing Agency requirements for field and laboratory testing of ready mixed concrete delivered to the project. It is intended for use by specifiers, architects, engineers, owners, contractors, and other groups interested in monitoring the quality of concrete used in project construction. This Reference Specification can be made applicable to any construction project by citing it in a Contract. The Specifier supplements the provisions of this Reference Specification as needed by specifying individual project requirements in the Contract.