ASTM D5817-96

Standard Practice for Carbon Black, Pelleted-Reduction and Blending of Gross Samples

SCOPE
1.1 This practice describes the procedure for the reduction of gross samples of pelleted carbon black to the appropriate size for testing and the procedure for blending of pelleted carbon black. These techniques are intended to minimize variations in measured characteristics between test samples. Standard terminology relating to carbon black samples is found in Terminology D3053.  
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Dec-1995
• ICS: 71.060.10 - Chemical elements
• Technical Committee: D24 - Carbon Black
• Drafting Committee: D24.61 - Carbon Black Sampling and Statistical Analysis

Relations

• Replaced By: ASTM D5817-03 - Standard Practice for Carbon Black, Pelleted-Reduction, Blending, and Drying of Gross Samples for Testing
• Effective Date: 10-Jan-2003

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn. Contact ASTM International (www.astm.org) for the latest information.
Designation: D 5817 – 96
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Practice for
Carbon Black, Pelleted—Reduction and Blending of Gross
1
Samples
This standard is issued under the fixed designation D 5817; 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 4. Significance and Use
1.1 This practice describes the procedure for the reduction 4.1 Several test methods for carbon black require the
of gross samples of pelleted carbon black to the appropriate reduction in sample size or the blending of the test sample to
size for testing and the procedure for blending of pelleted reduce the variation of the measured characteristic. Other
carbon black. These techniques are intended to minimize factors being equal, larger samples will tend to be more
variations in measured characteristics between test samples. representative of the total supply. This practice provides
Standard terminology relating to carbon black samples is found procedures for reducing the large sample obtained from the bag
in Terminology D 3053. and bulk sampling practices to a convenient size for conducting
1.2 The values stated in SI units are to be regarded as the a number of tests to describe the material and measure its
standard. The values given in parentheses are for information quality in such a manner that the smaller portion is most likely
only. to be a representation of the bulk sample. Failure to follow the
1.3 This standard does not purport to address all of the procedures in this practice could result in providing a nonrep-
safety concerns, if any, associated with its use. It is the resentative sample to be used in subsequent testing. Individual
responsibility of the user of this standard to establish appro- test methods provide for minimum amounts of material to be
priate safety and health practices and determine the applica- tested.
bility of regulatory limitations prior to use. 4.2 Test Method A, Reduction of Sample Size, is typically
used to obtain an aliquot from a large sample, splitting a black
2. Referenced Documents
into two or more equal portions, or reducing a blended black
from Test Method B to a specified sample size. The final
2.1 ASTM Standards:
sample is always smaller than the original sample and would
D 1799 Practice for Carbon Black—Sampling Packaged
2
Shipments not be considered to be a “well blended” sample.
4.3 Test Method B, Blending of Carbon Black, is typically
D 1900 Practice for Carbon Black—Sampling Bulk Ship-
2
ments used to prepare a homogeneous sample. The homogeneous
2
sample may be used for several tests (see Note 2) or may be
D 3053 Terminology Relating to Carbon Black
reduced in size by Test Method A. The final sample size is the
3. Summary of Test Methods
same as the original.
4.4 When a sample is to be blended and reduced, the sample
3.1 Test Method A—Reduction of Sample Size:
should be blended (Test Method B) before reduction (Test
3.1.1 The gross bulk sample is poured through the riffle
Method A).
sample splitter. A portion of the sample is reintroduced into the
splitter as many times as necessary to reduce the gross sample
5. Apparatus
to the size desired for the intended test portion. The test portion
3
5.1 Riffle Sample Splitter —Riffle type sample splitters shall
may not be homogeneous.
have an even number of equal width chutes, but not less than
3.2 Test Method B—Blending of Carbon Black:
a total of twelve, that discharge alternately to each side of the
3.2.1 The gross sample is poured through the riffle sample
1
splitter. The chutes shall be 1.3 cm ( ⁄2 in.) or less in width. The
splitter a minimum of four times in a specific sequence to
splitter shall be equipped with two receptacles to hold the two
prepare a homogeneous test portion. The black must be
halves of the sample following splitting. It shall also be
cross-blended to accomplish a homogeneous portion for test-
equipped with a hopper or straight-edged pan that has a width
ing.
equal to or slightly less than the overall width of the assembly
1
This practice is under the jurisdiction of ASTM Committee D-24 on Carbon
3
Black and is the direct responsibility of Subcommittee D24.61 on Carbon Black Humboldt Cat H-3980 and Tyler Cat S.S. 50 have been found satisfactory.
Sampling and Statistical Analysis. Humboldt Cat H-3980 available from Humboldt Manufacturing Co., 7300 W.
Current edition approved Oct. 10, 1995. Published December 1995. Agatite Ave., Norridge, IL 60656. Tyler Cat S.S. 50 available from C-
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