tailieunhanh - Designation C 31/C 31M - 96 - Making and curing concrete test specimens in the Field

Tài liệu tham khảo chuyên ngành kiến trúc, xây dựng - Designation C 31/C 31M - 96 - Making and curing concrete test specimens in the Field. | Designation c 31 C 31M - 96 AMERICAN SOCIETY FOR TESTING AND MATERIALS 100 Barr Harbor Dr. West Conshohocken PA 19428 Reprinted from the Annual Book of ASTM Standards. Copyright ASTM If not listed in the current combined index will appear in the next edition. Standard Practice for Making and Curing Concrete Test Specimens in the Field1 This standard is issued under the fixed designation c 3 l c 3 IM the number immediately following the designation indicates the year of original adoption or in the case of revision the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon indicates an editorial change since the last revision or reapproval. This practice has been approved for use by agencies of the Department of Defense. Consult the DoD Index of Specifications and Standards for the specific year of issue which has been adopted by the Department of Defense. 1. Scope This practice covers procedures for making and curing cylindrical and prismatic beam specimens from representative samples of fresh concrete for a construction project. The concrete used to make the molded specimens shall have the same levels of slump air content and percentage of coarse aggregate as the concrete it represents. This practice is not satisfactory for making specimens from concretes not having a measurable slump or requiring other sizes and shapes of specimens to represent a product or structure. The values stated in either inch-pound units or SI units shall be regarded separately as standard. The SI units are shown in brackets. The values stated may not be exact equivalents therefore each system must be used independently of the other. Combining values from the two units may result in nonconformance. This standard does not purport to address all of the safety concerns if any associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the .