Standard Test Method for Fineness of Hydraulic Cement by Air Jet Sieving at 45-µm (No. 325)

SIGNIFICANCE AND USE
5.1 This test method provides data for assessing compliance where specifications limit the amount of material retained when sieved on a 45-µm (No. 325) sieve.
SCOPE
1.1 This test method covers the determination of the fineness of hydraulic cement by means of air jet sieving using a 45-µm (No. 325) sieve by Air Jet sieving.  
1.2 The values stated in SI units are regarded as the standard. The inch-pound equivalents may be approximate  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 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.

General Information

Status
Historical
Publication Date
14-Jun-2019
Technical Committee
Drafting Committee
Current Stage
Ref Project

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ASTM C1891-19 - Standard Test Method for Fineness of Hydraulic Cement by Air Jet Sieving at 45-µm (No. 325)
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: C1891 − 19
Standard Test Method for
Fineness of Hydraulic Cement by Air Jet Sieving at 45-µm
1
(No. 325)
This standard is issued under the fixed designation C1891; 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 apparatus. Air from a slowly-rotating nozzle located beneath
the sieve passes through the sieve to fluidize the sample for a
1.1 This test method covers the determination of the fine-
predetermined period of time. The exit air flow removes
ness of hydraulic cement by means of air jet sieving using a
undersized particles downward through the test sieve to a
45-µm (No. 325) sieve by Air Jet sieving.
vacuum canister.The mass of hydraulic cement retained on the
1.2 The values stated in SI units are regarded as the
test sieve is determined, and the percent passing the test sieve
standard. The inch-pound equivalents may be approximate
is calculated.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5. Significance and Use
responsibility of the user of this standard to establish appro-
5.1 This test method provides data for assessing compliance
priate safety, health, and environmental practices and deter-
where specifications limit the amount of material retained
mine the applicability of regulatory limitations prior to use.
when sieved on a 45-µm (No. 325) sieve.
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
6. Apparatus
ization established in the Decision on Principles for the
6.1 Air Jet Sieving Apparatus:
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
6.2 Sieve:
Barriers to Trade (TBT) Committee.
6.2.1 Sieve Frame—The sieve frame shall be of a rigid
material, preferably bronze or stainless steel, not subject to
2. Referenced Documents
corrosion (for purposes of the cleaning procedure). The frame
2.1 ASTM Standards:
shall be circular and it shall be 203 mm (8 in.) in diameter to
C219 Terminology Relating to Hydraulic Cement
fit the air jet sieving apparatus.
C430 Test Method for Fineness of Hydraulic Cement by the
6.2.2 Sieve Cloth—The sieve frame shall be fitted with a
45-µm (No. 325) Sieve
45-µm (No. 325) stainless steel AISI Type 304 woven-wire
E11 Specification for Woven Wire Test Sieve Cloth and Test
sieve cloth, conforming to the requirements of E11. The sieve
Sieves
cloth shall be mounted in the frame without distortion, loose-
E177 Practice for Use of the Terms Precision and Bias in
ness or wrinkling. The joint between the cloth and frame shall
ASTM Test Methods
be smooth and without holes.
E691 Practice for Conducting an Interlaboratory Study to
6.3 Sieve Cover—A cover made of hard plastic or metal is
Determine the Precision of a Test Method
necessary for covering the sieve and achieving a seal. The seal
3. Terminology
needs to be such that the apparatus can maintain a vacuum
3.1 Definitions: pressure throughout the test period.
3.1.1 Terms relating to this test method are defined in
6.4 Vacuum Device—A canister type vacuum cleaner that
Terminology C219.
can achieve and maintain at least 2.5 kPa (254 mm or 10-in.
water column) vacuum.
4. Summary of Test Method
6.5 Timer—Adevicecapableoftimingthetestperiodwithin
4.1 A known mass of hydraulic cement is placed on a test
sieve that is inserted in the sieve holder of the air jet sieve 1 s. It can be attached and automatic, or such that it lets the
operator know when to start and stop the apparatus.
1
This test method is under the jurisdiction ofASTM Committee C01 on Cement
6.6 Vacuum Gauge—A gauge capable of indicating the
and is the direct responsibility of Subcommittee C01.25 on Fineness.
vacuum pressure below the sieve within 0.1 kPa (12.7-mm or
Current edition approved June 15, 2019. Published July 2019. DOI: 10.1520/
C1891-19. 0.5-in. water column).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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C1891 − 19
remains. For hydraulic cement, 180 s has been found to be sufficient in
6.7 Brush—Abrush with soft bristles used to brush material
most cases.
off the cover to and onto the sieve.
6.8 Low Power Ultrasonic Bath—150 W maximum and
9. Cleaning of Sieves
large enough to allow submersion and cleaning of a 203 mm
9.1 Frequency of Cleaning and Standardization—Sieves
(8 in.) sieve. A smaller bath is acceptable if the sieve can be
shall be cleaned after no more than five determinations and
partially
...

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