Designation: C 157/C 157M – 08 Standard Test Method for Length Change of Hardened Hydraulic-Cement Mortar and Concrete 1 This standard is issued under the fixed designation C 157/C 157M; 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 standard has been approved for use by agencies of the Department of Defense. 1. Scope* 1.1 This test method covers the determination of the length
changes that are produced by causes other than externally
applied forces and temperature changes in hardened hydraulic-
cement mortar and concrete specimens made in the laboratory
and exposed to controlled conditions of temperature and
1.2 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. An exception is with
regard to sieve sizes and nominal size of aggregate, in which
the SI values are the standard as stated in Specification
Within the text, the SI units are shown in brackets. The values
stated in each system may not be exact equivalents; therefore,
each system shall be used independently of the other. Combin-
ing values from the two systems may result in non-
conformance with the standard.
1.3 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 appro- priate safety and health practices and determine the applica- bility of regulatory limitations prior to use.