This standard is issued under the fixed designation C 490; 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 (e) indicates an editorial change since the last revision or reapproval. | Designation C 490 00a Standard Practice for Use of Apparatus for the Determination of Length Change of Hardened Cement Paste Mortar and Concrete1 This standard is issued under the fixed d ii r atic n c 490 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 e indicates an editorial change since the last revision or reapproval. 1. Scope This practice covers the requirements for the apparatus and equipment used to prepare specimens for the determination of length change in hardened cement paste mortar and concrete the apparatus and equipment used for the determination of these length changes and the procedures for its use. Methods for the preparation and curing of test specimens conditions of testing and curing and detailed procedures for calculating and reporting test results are contained in applicable test methods. The values stated in SI units or inch-pound units are to be regarded as standard. The values in each system may not be exact equivalents therefore each system shall be used independently of the other. Combining values from the two systems may result in nonconformance iith the standard. 2. Referenced Documents ASTM Standards C 511 Specification for Moiss CiT i iM lte Moiss Rooms and Water Storage Tanks Used in the Testing of Hydraulic Cements and Concretes2 C 1005 Speciricalío n To r Reference Masses a nd Dev ices To r Determining Mass and Volume for Use in the Physical Testing of Hydraulic Cements2 3. Terminology length change an increase or decrease m the in near dimension of a test specimen measured along the longitudinal axis due to causes other than applied load. 4. Significance and Use This practice is intended to provide standard requirements for apparatus common to many test methods used in connection with cement and concrete and standardized .
