ASTM C157/C157M-99 - 10.7.1999
 
1. Scope

1.1 This test method covers determination of the length changes of hardened hydraulic-cement mortar and concrete due to causes other than externally applied forces and temperature changes.

1.2 The term "length change," as used here, is defined as an increase or decrease in a linear dimension of a test specimen which has been caused to change by any factor other than externally applied forces and temperature changes.

1.3 The values stated in inch-pound units are to be regarded as the standard.

1.4 This standard does not purport to address all of the safety problems, 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 applicability of regulatory limitations prior to use.

 
2. Referenced Documents

C125-26

Standard Terminology Relating to Concrete and Concrete Aggregates

C143/C143M-26b

Standard Test Method for Slump of Concrete (Includes all amendments and changes 8/6/2026).

C172-08

Standard Practice for Sampling Freshly Mixed Concrete

C192/C192M-26b

Standard Practice for Making and Curing Concrete Test Specimens in the Laboratory (Includes all amendments and changes 10/13/2026).

C305-20

Standard Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency

E337-15(2023)

Standard Test Method for Measuring Humidity with a Psychrometer (the Measurement of Wet- and Dry-Bulb Temperatures)

C511-21

Standard Specification for Mixing Rooms, Moist Cabinets, Moist Rooms, and Water Storage Tanks Used in the Testing of Hydraulic Cements and Concretes

C596-23

Standard Test Method for Drying Shrinkage of Mortar Containing Hydraulic Cement

C1437-26

Standard Test Method for Flow of Hydraulic Cement Mortar

E11-24

Standard Specification for Woven Wire Test Sieve Cloth and Test Sieves

C490-07

Standard Practice for Use of Apparatus for the Determination of Length Change of Hardened Cement Paste, Mortar, and Concrete