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  • ASTM
    C1565-09 Standard Test Method for Determination of Pack-Set Index of Portland Cement
    Edition: 2009
    $93.60
    Unlimited Users per year

Description of ASTM-C1565 2009

ASTM C1565 - 09

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

Active Standard ASTM C1565 | Developed by Subcommittee: C01.20

Book of Standards Volume: 04.01




ASTM C1565

Significance and Use

This method is intended to help manufacturers determine the relative pack-set tendency of their cement(s). The test establishes a pack-set index which, when properly correlated with field performance, is useful in predicting or preventing field unloading difficulties.

The test is an aid to routine control during cement production and is not suitable for specification purposes.

In general, field performance of cement flowability is satisfactory when the pack-set index as determined on freshly ground cement averages 0 to 15 and is unsatisfactory when the index exceeds 25. Any prediction of field performance of cement flowability measuring 16 to 25 is tenable. These are general ranges and the field performance of individual cements may not necessarily fall within these ranges. Additional conditions, after the cement has left the control of the manufacturing facility, can affect the apparent pack set index as well.

Any attempt to apply the critical range of pack-set index numbers based on freshly ground cement to job cement without special treatment of the sample would be problematic. The test is a GO-NO GO type of test and should not be used for specification purposes.

The pack-set index of field cement can be evaluated in terms of the pack-set index ranges of that cement as determined when freshly-ground. This comparison can aid the manufacturer in producing cement that offers the best field performance for pack-set properties.

Silo storage of cement may result in a greater amount of consolidation than this method is designed to induce, and the resulting forces required to overcome that consolidation are not measured by this test method.

Pack set is not to be confused with warehouse set which results from surface hydration of the cement from adsorbed moisture.

1. 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 standard. No other units of measurement are included in this standard. 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 tissue upon prolonged exposure.)


2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

C1005 Specification for Reference Masses and Devices for Determining Mass and Volume for Use in the Physical Testing of Hydraulic Cements


Keywords

pack set; pack-set index; peak voltage; portland cement; roto-tester; Cement; Consolidation; Field performance of cement flowability; Maximum voltage; Mechanical force; Pack-set index; Performance--building materials/applications; Portland cement; Roto-tester;


ICS Code

ICS Number Code 55.180.40 (Complete, filled transport packages); 91.100.10 (Cement. Gypsum. Lime. Mortar)


DOI: 10.1520/C1565-09

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ASTM C1565

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ASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide.

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