ASTM D6928-08e1
(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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´1
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 D6928; 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
´ NOTE—The section reference in Note 1 was corrected editorially and research report information was added editorially in
March 2009.
1. Scope 3.1.1 constant mass, n—the condition of a test sample dried
at a temperature of 110 6 5°C such that it will not lose more
1.1 This test method covers a procedure for testing coarse
than 0.1 % moisture after2hof drying.
aggregate for resistance to abrasion using the Micro-Deval
3.1.1.1 Discussion—Such a condition of dryness can be
apparatus.
verifiedbydeterminingthemassofthesamplebeforeandafter
1.2 The values stated in SI units are to be regarded as the
successive 2-h drying periods. In lieu of such a determination,
standard.
samples may be considered to have reached constant mass
1.3 The text of this method references notes and footnotes
when they have been dried at a temperature of 110 6 5°C for
which provide explanatory material. These notes and footnotes
an equal or longer period than that previously found adequate
(excluding those in tables and figures) shall not be considered
for producing the desired constant mass condition under equal
as requirements of the test method.
or heavier loading conditions of the oven.
1.4 This procedure may involve hazardous materials, opera-
tions, and equipment. This standard does not purport to
4. Summary of Test Method
address all of the safety concerns, if any, associated with its
4.1 The Micro-Deval Test is a measure of abrasion resis-
use. It is the responsibility of the user of this standard to
tance and durability of mineral aggregates resulting from a
establish appropriate safety and health practices and deter-
combination of actions including abrasion and grinding with
mine the applicability of regulatory limitations prior to use.
steel balls in the presence of water. A sample with standard
2. Referenced Documents grading is initially soaked in water for not less than one hour.
2
The sample is then placed in a jar mill with 2.0 Lof water and
2.1 ASTM Standards:
an abrasive charge consisting of 5000 g of 9.5-mm diameter
C136 Test Method for Sieve Analysis of Fine and Coarse
steelballs.Thejar,aggregate,water,andchargearerevolvedat
Aggregates
100 rpm for up to 2 h, depending on the particle size. The
C670 Practice for Preparing Precision and Bias Statements
sample is then washed and oven dried. The loss is the amount
for Test Methods for Construction Materials
of material passing the 1.18-mm sieve expressed as a percent
E11 SpecificationforWovenWireTestSieveClothandTest
by mass of the original sample.
Sieves
5. Significance and Use
3. Terminology
5.1 The Micro-Deval abrasion test is a test of coarse
3.1 Definitions:
aggregate to determine abrasion loss in the presence of water
and an abrasive charge. Many aggregates are more susceptible
1
This test method is under the jurisdiction of ASTM Committee D04 on Road
to abrasion when wet than dry, and the use of water in this test
and Paving Materials and is the direct responsibility of Subcommittee D04.51 on
incorporates this reduction in resistance to degradation in
Aggregate Tests.
contrast to some other tests, which are conducted on dry
Current edition approved Feb. 1, 2008. Published March 2008. Originally
approved in 2003. Last previous edition approved in 2006 as D6928 – 06. DOI:
aggregate. The test results are helpful in evaluating the
10.1520/D6928-08E01.
toughness/abrasion resistance of coarse aggregate subject to
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
abrasion when adequate information is not available from
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
service records.
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.
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D6928–08
5.2 The Micro-Deval abrasion test is useful for detecting 8.4 Inacasewherethemaximumnominalsizeofthecoarse
changes in properties of aggregate produced from an aggregate aggregate is 9.5 mm or less, a sample 1500 6 5 g shall be
source as part of a quality control or quality assurance process. prepared as follows:
Passing Retained Mass
9.5-mm 6.3-mm 750 g
6. Apparatus
6.3-mm 4.75-mm 750 g
6.1 Micro-Deval Abrasion Mach
...
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.
´1
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 (´) indicates an editorial change since the last revision or reapproval.
1
´ NOTE—The section reference in Note 1 was corrected editorially and research report information was added editorially in
March 2009.
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
E11 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
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 ----------------------
´1
D6928–08
are helpful in evaluating the toughness/abrasion resistance of coarse aggregate subject to abrasion when adequate information is
not available from service records.
5.2 The Micro-Deval abrasion test is useful for detecting changes in properti
...
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