ASTM C786/C786M-17

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: C786/C786M − 17
Standard Test Method for
Fineness of Hydraulic Cement and Raw Materials by the
300-µm (No. 50), 150-µm (No. 100), and 75-µm (No. 200)
1
Sieves by Wet Methods
This standard is issued under the fixed designation C786/C786M; 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* C125 Terminology Relating to Concrete and Concrete Ag-
gregates
1.1 This test method covers wet sieving techniques for
C184 Test Method for Fineness of Hydraulic Cement by the
determination of fineness of hydraulic cement and raw mate-
150-µm (No. 100) and 75-µm (No. 200) Sieves (With-
rials by means of the 300-µm (No. 50), the 150-µm (No. 100),
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drawn 2002)
and the 75-µm (No. 200) sieves.
C219 Terminology Relating to Hydraulic Cement
1.2 The values stated in either SI units or inch-pound units
C430 Test Method for Fineness of Hydraulic Cement by the
are to be regarded separately as standard. The values stated in
45-µm (No. 325) Sieve
each system may not be exact equivalents; therefore, each
E11 Specification for Woven Wire Test Sieve Cloth and Test
system shall be used independently of the other. Combining
Sieves
values from the two systems may result in non-conformance
IEEE/ASTM SI 10 American National Standard for Use of
with the standard.Values in SI units [or inch-pound units] shall
theInternationalSystemofUnits(SI):TheModernMetric
be obtained by measurement in SI units [or inch-pound units]
System
or by appropriate conversion, using the Rules for Conversion
and Rounding given in IEEE/ASTM SI 10 of measurements
3. Terminology
made in other units. Values are stated in SI units when
3.1 Definitions:
inch-pound units are not used in practice.
3.1.1 For definitions of terms used in this test method, refer
1.3 This standard does not purport to address all of the
to Terminology C125 and C219.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4. Apparatus
priate safety, health, and environmental practices and deter-
4.1 Wet Test Sieves—Standard 300-µm (No. 50), 150-µm
mine the applicability of regulatory limitations prior to use.
(No. 100), or 75-µm (No. 200) sieve cloth conforming to the
1.4 This international standard was developed in accor-
requirements of Specification E11, for standard sieves shall be
dance with internationally recognized principles on standard-
wovenfromAISIType304wire.Theclothshallbemountedin
ization established in the Decision on Principles for the
the frame without distortion, looseness, or wrinkling. Sieve
Development of International Standards, Guides and Recom-
frames are designated as 76.2 or 101.6-mm [3 or 4-in.]
mendations issued by the World Trade Organization Technical
diameter type, as follows:
Barriers to Trade (TBT) Committee.
Sieves
76 mm 102 mm
2. Referenced Documents
[3-in.] [4-in.]
2
mm [in.] mm [in.]
2.1 ASTM Standards:
C114 Test Methods for Chemical Analysis of Hydraulic
Diameter of frame 76 ± 6 102±6
Cement
[3.0 ± 0.25] [4.0 ± 0.25]
Depth of sieve from top of frame 83 ± 6 108±6
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This test method is under the jurisdiction ofASTM Committee C01 on Cement
[3.25 ± 0.25] [4.25 ± 0.25]
and is the direct responsibility of Subcommittee C01.25 on Fineness.
Current edition approved Dec. 1, 2017. Published December 2017. Originally Overall height 102 ± 6 127±6
[4.0 ± 0.25] [5.0 ± 0.25]
approved in 1974. Last previous edition approved in 2016 as C786/
C786M – 10 (2016). DOI: 10.1520/C0786_C0786M-17.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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C786/C786M − 17
4.1.1 For a sieve fabricated by soldering the cloth to the the average of the amounts passing, expressed as percent, as
frame, the joint shall be made smooth to prevent material from the standard value of the sample. Use this standard sample to
lodging in the joints between the sieve cloth and the frame. calibratethewetsieves.Placetheentiresampleinairtightvials
Two-pie
...