ASTM D6928-08
(Test Method)Standard Test Method for Resistance of Coarse Aggregate to Degradation by Abrasion in the Micro-Deval Apparatus
Standard Test Method for Resistance of Coarse Aggregate to Degradation by Abrasion in the Micro-Deval Apparatus
SIGNIFICANCE AND USE
The Micro-Deval abrasion test is a test of coarse aggregate to determine abrasion loss in the presence of water and an abrasive charge. Many aggregates are more susceptible to abrasion when wet than dry, and the use of water in this test incorporates this reduction in resistance to degradation in contrast to some other tests, which are conducted on dry aggregate. The test results are helpful in evaluating the toughness/abrasion resistance of coarse aggregate subject to abrasion when adequate information is not available from service records.
The Micro-Deval abrasion test is useful for detecting changes in properties of aggregate produced from an aggregate source as part of a quality control or quality assurance process.
SCOPE
1.1 This test method covers a procedure for testing coarse aggregate for resistance to abrasion using the Micro-Deval apparatus.
1.2 The values stated in SI units are to be regarded as the standard.
1.3 The text of this method references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the test method.
1.4 This procedure may involve hazardous materials, operations, and equipment. 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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Designation:D6928–08
Standard Test Method for
Resistance of Coarse Aggregate to Degradation by Abrasion
1
in the Micro-Deval Apparatus
This standard is issued under the fixed designation D 6928; 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 3.1.1.1 Discussion—Such a condition of dryness can be
verifiedbydeterminingthemassofthesamplebeforeandafter
1.1 This test method covers a procedure for testing coarse
successive 2-h drying periods. In lieu of such a determination,
aggregate for resistance to abrasion using the Micro-Deval
samples may be considered to have reached constant mass
apparatus.
when they have been dried at a temperature of 110 6 5°C for
1.2 The values stated in SI units are to be regarded as the
an equal or longer period than that previously found adequate
standard.
for producing the desired constant mass condition under equal
1.3 The text of this method references notes and footnotes
or heavier loading conditions of the oven.
which provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered
4. Summary of Test Method
as requirements of the test method.
4.1 The Micro-Deval Test is a measure of abrasion resis-
1.4 This procedure may involve hazardous materials, opera-
tance and durability of mineral aggregates resulting from a
tions, and equipment. This standard does not purport to
combination of actions including abrasion and grinding with
address all of the safety concerns, if any, associated with its
steel balls in the presence of water. A sample with standard
use. It is the responsibility of the user of this standard to
grading is initially soaked in water for not less than one hour.
establish appropriate safety and health practices and deter-
The sample is then placed in a jar mill with 2.0 Lof water and
mine the applicability of regulatory limitations prior to use.
an abrasive charge consisting of 5000 g of 9.5-mm diameter
2. Referenced Documents steelballs.Thejar,aggregate,water,andchargearerevolvedat
2
100 rpm for up to 2 h, depending on the particle size. The
2.1 ASTM Standards:
sample is then washed and oven dried. The loss is the amount
C 136 Test Method for Sieve Analysis of Fine and Coarse
of material passing the 1.18-mm sieve expressed as a percent
Aggregates
by mass of the original sample.
C 670 Practice for Preparing Precision and Bias Statements
for Test Methods for Construction Materials
5. Significance and Use
E11 Specification for Wire Cloth and Sieves for Testing
5.1 The Micro-Deval abrasion test is a test of coarse
Purposes
aggregate to determine abrasion loss in the presence of water
3. Terminology and an abrasive charge. Many aggregates are more susceptible
to abrasion when wet than dry, and the use of water in this test
3.1 Definitions:
incorporates this reduction in resistance to degradation in
3.1.1 constant mass, n—the condition of a test sample dried
contrast to some other tests, which are conducted on dry
at a temperature of 110 6 5°C such that it will not lose more
aggregate. The test results are helpful in evaluating the
than 0.1 % moisture after2hof drying.
toughness/abrasion resistance of coarse aggregate subject to
abrasion when adequate information is not available from
service records.
1
This test method is under the jurisdiction of ASTM Committee D04 on Road
5.2 The Micro-Deval abrasion test is useful for detecting
and Paving Materials and is the direct responsibility of Subcommittee D04.51 on
changes in properties of aggregate produced from an aggregate
Aggregate Tests.
source as part of a quality control or quality assurance process.
Current edition approved Feb. 1, 2008. Published March 2008. Originally
approved in 2003. Last previous edition approved in 2006 as D 6928 – 06.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6. Apparatus
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
6.1 Micro-Deval Abrasion Machine, a jar rolling mill ca-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. pable of running at 100 6 5 rpm (Fig. 1).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D6928–08
FIG. 1 Micro-Deval Abrasion Machine and Container (dimensions in mm)
2
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D6928–08
NOTE 1—Micro-Deval abrasion machine fitted with a counter may be
9.2 Immerse the test sample in 2.0 6 0.05 L of tap water at
used if the test
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D6928–06 Designation:D6928–08
Standard Test Method for
Resistance of Coarse Aggregate to Degradation by Abrasion
1
in the Micro-Deval Apparatus
This standard is issued under the fixed designation D 6928; 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
1.1 This test method covers a procedure for testing coarse aggregate for resistance to abrasion using the Micro-Deval apparatus.
1.2 The values stated in SI units are to be regarded as the standard.
1.3 The text of this method references notes and footnotes which provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered as requirements of the test method.
1.4 This procedure may involve hazardous materials, operations, and equipment. 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.
2. Referenced Documents
2
2.1 ASTM Standards:
C 136 Test Method for Sieve Analysis of Fine and Coarse Aggregates
C 670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
E 11 Specification for Wire Cloth and Sieves for Testing Purposes
3. Terminology
3.1 Definitions:
3.1.1 constant mass, n—the condition of a test samples dried at a temperature of 110 6 5°C to a condition such that it will not
lose more than 0.1 % moisture after2hof drying.
3.1.1.1 Discussion—Such a condition of dryness can be verified by weighingdetermining the mass of the sample before and
after successive 2-h drying periods. In lieu of such a determination, samples may be considered to have reached constant mass
when they have been dried at a temperature of 110 6 5°C for an equal or longer period than that previously found adequate for
producing the desired constant mass condition under equal or heavier loading conditions of the oven.
4. Summary of Test Method
4.1 The Micro-DevalTest is a measure of abrasion resistance and durability of mineral aggregates resulting from a combination
of actions including abrasion and grinding with steel balls in the presence of water. A sample with standard grading is initially
soaked in water for not less than one hour. The sample is then placed in a jar mill with 2.0 L of water and an abrasive charge
consisting of 5000 g of 9.5-mm diameter steel balls. The jar, aggregate, water, and charge are revolved at 100 rpm for up to 2 h,
depending on the particle size.The sample is then washed and oven dried.The loss is the amount of material passing the 1.18-mm
sieve expressed as a percent by mass of the original sample.
5. Significance and Use
5.1 The Micro-Deval abrasion test is a test of coarse aggregate to determine abrasion loss in the presence of water and an
abrasive charge. Many aggregates are more susceptible to abrasion when wet than dry, and the use of water in this test incorporates
this reduction in resistance into degradation in contrast to some other tests, which are conducted on dry aggregate. The test results
are helpful in evaluating the toughness/abrasion resistance of coarse aggregate subject to abrasion when adequate information is
not available from service records.
1
This test method is under the jurisdiction ofASTM Committee D04 on Road and Paving Materials and is the direct responsibility of Subcommittee D04.51 onAggregate
Tests.
Current edition approved Jan.Feb. 1, 2006.2008. Published January 2006.March 2008. Originally approved in 2003. Last previous edition approved in 20032006 as
D 6928 – 036.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D6928–08
5.2 The Micro-Deval abrasion test is useful for detecting changes in properties of aggregate produced from an aggregate source
as part of a quality control or quality assurance process.
6. Apparatus
6.1 Micro-Deval Abr
...
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