scope:

1. Scope

1.1 This test method covers the determination of change in height of cylindrical specimens from the time of casting until the mixture is hard. If desired, this test method can be adapted to studies of changes in height involving different time schedules or other environmental treatment from the standard procedures prescribed by this test method.

1.2 This test method covers height change measurements at early ages for cementitious mixtures of paste, grout, mortar, and concrete.

1.3 Use of this test method is suggested for determination of changes in height that occur from the time of placement until the specimen is fully hard. These include shrinkage or expansion due to hydration, settlement, evaporation, and other physical and chemical effects.

1.4 The phrase "early age change in height" as used herein, is defined as the measured increase or decrease in height of a laterally confined cylindrical test specimen from the time of casting to when the mixture becomes hard. The user may want to define this age as the time when a companion specimen of the same batch has reached the time of final setting by Test Method C 191 (paste), C 953 (mortar or grout), C 403 (concrete), or establish a predetermined age in minutes from the time the specimen is cast as the defined age to record the final measurement. Changes in height are measured and expressed as a positive or negative change in the height of a test specimen that is restrained from lateral movement.

1.5 The values stated in SI units are to be regarded as the standard.

1.6 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 applicability of regulatory limitations prior to use.