ASTM C204-05
(Test Method)Standard Test Method for Fineness of Hydraulic Cement by Air Permeability Apparatus
Standard Test Method for Fineness of Hydraulic Cement by Air Permeability Apparatus
SCOPE
1.1 This test method covers determination of the fineness of hydraulic cement, using the Blaine air-permeability apparatus, in terms of the specific surface expressed as total surface area in square centimetres per gram, or square metres per kilogram, of cement. Two test methods are given: Test Method A is the Reference Test Method using the manually operated standard Blaine apparatus, while Test Method B permits the use of automated apparatus that has in accordance with the qualification requirements of this test method demonstrated acceptable performance. Although the test method may be, and has been, used for the determination of the measures of fineness of various other materials, it should be understood that, in general, relative rather than absolute fineness values are obtained.
1.1.1 This test method is known to work well for portland cements. However, the user should exercise judgement in determining its suitability with regard to fineness measurements of cements with densities, or porosities that differ from those assigned to Standard Reference Material No. 114.
1.2 The values stated in SI units are to be regarded as the standard.
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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American Association State
Designation: C 204 – 05 Highway and Transportation Officials Standard
AASHTO No.: T 153
Standard Test Methods for
Fineness of Hydraulic Cement by Air-Permeability
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Apparatus
This standard is issued under the fixed designation C 204; 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 2.2 Other Document:
No. 114 National Institute of Standards and Technology
1.1 This test method covers determination of the fineness of
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Standard Reference Material
hydraulic cement, using the Blaine air-permeability apparatus,
BS 4359: 1971 British Standard Method for the Determina-
in terms of the specific surface expressed as total surface area
tion of Specific Surface of Powders: Part 2: Air Perme-
in square centimetres per gram, or square metres per kilogram,
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ability Methods
of cement. Two test methods are given: Test Method A is the
Reference Test Method using the manually operated standard
TEST METHOD A: REFERENCE METHOD
Blaine apparatus, while Test Method B permits the use of
automated apparatus that has in accordance with the qualifica-
3. Apparatus
tion requirements of this test method demonstrated acceptable
3.1 Nature of Apparatus—The Blaine air-permeability ap-
performance. Although the test method may be, and has been,
paratus consists essentially of a means of drawing a definite
used for the determination of the measures of fineness of
quantity of air through a prepared bed of cement of definite
various other materials, it should be understood that, in
porosity.The number and size of the pores in a prepared bed of
general, relative rather than absolute fineness values are
definite porosity is a function of the size of the particles and
obtained.
determines the rate of airflow through the bed. The apparatus,
1.1.1 This test method is known to work well for portland
illustrated in Fig. 1, shall consist specifically of the parts
cements. However, the user should exercise judgement in
described in 3.2-3.8.
determining its suitability with regard to fineness measure-
3.2 Permeability Cell—The permeability cell shall consist
ments of cements with densities, or porosities that differ from
of a rigid cylinder 12.70 6 0.10 mm in inside diameter,
those assigned to Standard Reference Material No. 114.
constructed of austenitic stainless steel. The interior of the cell
1.2 The values stated in SI units are to be regarded as the
shallhaveafinishof0.81µm(32µin.).Thetopofthecellshall
standard.
be at right angles to the principal axis of the cell. The lower
1.3 This standard does not purport to address all of the
portion of the cell must be able to form an airtight fit with the
safety concerns, if any, associated with its use. It is the
upper end of the manometer, so that there is no air leakage
responsibility of the user of this standard to establish appro-
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between the contacting surfaces. A ledge ⁄2 to 1 mm in width
priate safety and health practices and determine the applica-
shall be an integral part of the cell or be firmly fixed in the cell
bility of regulatory limitations prior to use.
55 6 10 mm from the top of the cell for support of the
perforated metal disk. The top of the permeability cell shall be
2. Referenced Documents
fitted with a protruding collar to facilitate the removal of the
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2.1 ASTM Standards:
cell from the manometer.
A 582/A 582M Specification for Free-Machining Stainless
NOTE 1—Specification A 582/A 582M Type 303 stainless steel (UNS
Steel Bars
designation S30300) has been found to be suitable for the construction of
C 670 Practice for Preparing Precision and Bias Statements
the permeability cell and the plunger.
for Test Methods for Construction Materials
3.3 Disk—The disk shall be constructed of noncorroding
E 832 Specification for Laboratory Filter Papers
metal and shall be 0.9 6 0.1 mm in thickness, perforated with
30 to 40 holes 1 mm in diameter equally distributed over its
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This test method is under the jurisdiction ofASTM Committee C01 on Cement area. The disk shall fit the inside of the cell snugly. The center
and is the direct responsibility of Subcommittee C01.25 on Fineness.
Current edition approved Nov. 1, 2005. Published November 2005. Originally
approved in 1946. Last previous edition approved in 2000 as C 204 – 00.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from National Institute of Standards and Technology (NIST), 100
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Bureau Dr., Stop 3460, Gaithersburg, MD 20899-3460.
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