ASTM C953-06
(Test Method)Standard Test Method for Time of Setting of Grouts for Preplaced-Aggregate Concrete in the Laboratory
Standard Test Method for Time of Setting of Grouts for Preplaced-Aggregate Concrete in the Laboratory
SIGNIFICANCE AND USE
This test method determines the setting time of grout mixed to the fluid consistency required for its use in PA concrete.
The time of setting is also useful in determining the acceptability of components of grout that must be mixed to the fluid consistency required for production of PA concrete.
SCOPE
1.1 This method covers the determination test of time of setting of hydraulic cement grout mixtures used in preplaced-aggregate (PA) concrete using the vicat apparatus.
1.2 The values stated in SI units are to be regarded as 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 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:C953–06
Standard Test Method for
Time of Setting of Grouts for Preplaced-Aggregate Concrete
1
in the Laboratory
This standard is issued under the fixed designation C953; 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.
1. Scope* 5. Apparatus
1.1 This method covers the determination test of time of 5.1 Vicat Apparatus, in accordance with Test Method C191.
setting of hydraulic cement grout mixtures used in preplaced- 5.2 Moist Room, maintained in accordance with Specifica-
aggregate (PA) concrete using the vicat apparatus. tion C511.
1.2 The values stated in SI units are to be regarded as the
6. Test Sample
standard.
6.1 The test sample shall consist of at least 300 mLof grout
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the taken from a freshly-mixed batch prepared in accordance with
Practice C938 obtained from a mixer at the laboratory or
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- construction site.
bility of regulatory limitations prior to use.
7. Procedure
2. Referenced Documents
7.1 Warm the Vicat conical ring and base plate to approxi-
2
mately 100 °C.
2.1 ASTM Standards:
C191 Test Methods for Time of Setting of Hydraulic 7.2 Apply a thin film of paraffin wax to the base of the
conical ring and place the waxed conical ring on the base plate.
Cement by Vicat Needle
C938 Practice for Proportioning Grout Mixtures for Place a weight on the conical ring to ensure intimate contact
with the base plate and allow the conical ring and plate to cool
Preplaced-Aggregate Concrete
C511 Specification for Mixing Rooms, Moist Cabinets, to room temperature.
Moist Rooms, and Water Storage Tanks Used in the 7.3 Fill the conical ring apparatus with grout flush with its
top within 2 min after completion of mixing. Strike off the
Testing of Hydraulic Cements and Concretes
grout flush with the top of the conical ring by a single oblique
3. Summary of Method
stroke of a sharp-edged trowel held at a slight angle to the top
3.1 The time of setting, initial and final, of a sample of fluid of the ring. Smooth the top, if necessary, with a few light
grout is determined using the Vicat apparatus. touches of the pointed end of the trowel. Take care not to
compress the sample during these cutting and smoothing
4. Significance and Use
operations. The time of completion of molding shall be taken
4.1 This test method determines the setting time of grout
as the start of measurement of time of set.
mixed to the fluid consistency required for its use in PA 7.4 Store the specimen in the moist room.
concrete.
7.5 Determine the time of setting using the procedure
4.2 The time of setting is also useful in determining the described in Test Method C191 except that the first reading
acceptability of components of grout that must be mixed to the
shall b
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