Standard Test Method for Determination of Pack-Set Index of Portland Cement

SCOPE
1.1 This test method covers the determination of the pack-set index, which provides an indication of the mechanical force needed to overcome the consolidation of portland cement.
1.2 The pack-set index number provides a numerical value useful for manufacturers who desire to measure and control the effect that vibration-induced consolidation has upon the manufactured cement.
1.3 The values stated in SI units are to be regarded as the standard. Values stated in Inch-Pound units are for informational purposes only and are enclosed in parentheses. Values stated in SI units shall be obtained by measurement in SI units or by appropriate conversion, using the rules of Conversion and rounding given in Standard IEEE/ASTM SI 10, of measurements made in other units.
1.4 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. (WARNING—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and ittuse upon prolonged exposure).

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Historical
Publication Date
09-Jul-2003
Technical Committee
Drafting Committee
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ASTM C1565-03 - Standard Test Method for Determination of Pack-Set Index of Portland Cement
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: C 1565 – 03
Standard Test Method for
1
Determination of Pack-Set Index of Portland Cement
This standard is issued under the fixed designation C 1565; 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 3.1.1 maximum voltage, n—as pertaining to this method
only, the energy in volts applied to consolidate the sample,
1.1 This test method covers the determination of the pack-
which results in the maximum pack-set index for a particular
set index, which provides an indication of the mechanical force
cement and the apparatus used for the measurement.
needed to overcome the consolidation of portland cement.
3.1.2 pack set, n—a condition of hydraulic cement, exhib-
1.2 The pack-set index number provides a numerical value
ited in varying degrees, following silo storage or transport in
useful for manufacturers who desire to measure and control the
bulk railcars or trucks, that causes the cement to resist flowing
effect that vibration-induced consolidation has upon the manu-
until considerable mechanical effort has been applied.
factured cement.
3.1.3 pack-set index, n—the numerical indication of the
1.3 The values stated in SI units are to be regarded as the
degree of pack set a particular cement exhibits when subjected
standard. Values stated in Inch-Pound units are for informa-
to the procedures of this test method.
tional purposes only and are enclosed in parentheses. Values
stated in SI units shall be obtained by measurement in SI units
4. Summary of Test Method
or by appropriate conversion, using the rules of Conversion
4.1 Portland cement is placed into a flask and then consoli-
and rounding given in Standard IEEE/ASTM SI 10, of mea-
dated on a vibrating table by a vibration force controlled by
surements made in other units.
time and energy (volts). The consolidated bed is measured for
1.4 This standard does not purport to address all of the
relative strength by turning the flask to a horizontal position
safety concerns, if any, associated with its use. It is the
and rotating in 180° increments until the bed collapses from the
responsibility of the user of this standard to establish appro-
bottom of the flask. The number of half turns is a relative
priate safety and health practices and determine the applica-
indication of the force required to overcome the consolidation
bility of regulatory limitations prior to use. (WARNING—
and is designated the pack-set index, or P.S.I.
Fresh hydraulic-cementitious mixtures are caustic and may
cause chemical burns to skin and tissue upon prolonged
5. Significance and Use
2
exposure.)
5.1 This method is intended to help manufacturers deter-
mine the relative pack-set tendency of their cement(s). The test
2. Referenced Documents
establishes a pack-set index which, when properly correlated
2.1 ASTM Standards:
3 with field performance, is useful in predicting or preventing
C 150 Specification for Portland Cement
field unloading difficulties.
C 1005 Specification for Reference Masses and Devices for
5.2 The test is an aid to routine control during cement
Determining Mass and Volume for Use in the Physical
3 production and is not suitable for specification purposes.
Testing of Hydraulic Cements
5.3 In general, field performance of cement flowability is
IEEE/ASTM SI 10 International System of Units (SI) The
4 satisfactory when the pack-set index as determined on freshly
Modernized Metric System
ground cement averages 0 to 15 and is unsatisfactory when the
3. Terminology index exceeds 25. Any prediction of field performance of
cement flowability measuring 16 to 25 is tenable. These are
3.1 Definitions of Terms Specific to This Standard:
general ranges and the field performance of individual cements
may not necessarily fall within these ranges. Additional con-
1
This test method is under the jurisdiction of ASTM Committee C01 on Cement
ditions, after the cement has left the control of the manufac-
and is the direct responsibility of Subcommittee C01.20 on Additions.
turing facility, can affect the apparent pack set index as well.
Current edition approved July 10, 2003. Published October 2003.
2
Section on Safety, Manual of Cement Testing, Annual Book of ASTM
5.4 Any attempt to apply the critical range of pack-set index
Standards, Vol 04.01.
numbers based on freshly ground cement to job cement without
3
Annual Book of ASTM Standards, Vol 04.01.
special treatment of the sample would be problematic. The test
4
Annual Book of ASTM Standards, Vol 14.02.
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