ASTM C131/C131M-20
(Test Method)Standard Test Method for Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine
Standard Test Method for Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine
SIGNIFICANCE AND USE
5.1 This test has been widely used as an indicator of the relative quality or competence of various sources of aggregate having similar mineral compositions. The results do not automatically permit valid comparisons to be made between sources distinctly different in origin, composition, or structure. Assign specification limits with extreme care in consideration of available aggregate types and their performance history in specific end uses. The percent loss determined by this test method has no known consistent relationship to the percent loss for the same material when tested by Test Method C535.
SCOPE
1.1 This test method covers a procedure for testing of coarse aggregates with a maximum size smaller than 37.5 mm ([11/2 in.] for resistance to degradation using the Los Angeles testing machine (Note 1).
Note 1: A procedure for testing coarse aggregate larger than 19.0 mm [3/4 in.] is covered in Test Method C535. Thus coarse aggregates with a maximum size between 19 mm [3/4 in.] and 37.5 mm [11/2 in.] may be tested by Test Method C535 or Test Method C131/C131M.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.
Note 2: Sieve size is identified by its standard designation in Specification E11. The Alternative designation given in parentheses is for information only and does not represent a different standard sieve size.
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.
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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.
Designation: C131/C131M − 20
Standard Test Method for
Resistance to Degradation of Small-Size Coarse Aggregate
1
by Abrasion and Impact in the Los Angeles Machine
This standard is issued under the fixed designation C131/C131M; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 Thistestmethodcoversaprocedurefortestingofcoarse
1
A6/A6M Specification for General Requirements for Rolled
aggregates with a maximum size smaller than 37.5 mm ([1 ⁄2
Structural Steel Bars, Plates, Shapes, and Sheet Piling
in.] for resistance to degradation using the LosAngeles testing
C125 Terminology Relating to Concrete and Concrete Ag-
machine (Note 1).
gregates
NOTE 1—Aprocedure for testing coarse aggregate larger than 19.0 mm
C136 Test Method for Sieve Analysis of Fine and Coarse
3
[ ⁄4 in.] is covered in Test Method C535. Thus coarse aggregates with a
Aggregates
3 1
maximum size between 19 mm [ ⁄4 in.] and 37.5 mm [1 ⁄2 in.] may be
C535 Test Method for Resistance to Degradation of Large-
tested by Test Method C535 or Test Method C131/C131M.
Size CoarseAggregate byAbrasion and Impact in the Los
1.2 The values stated in either SI units or inch-pound units
Angeles Machine
are to be regarded separately as standard. The values stated in
C670 Practice for Preparing Precision and Bias Statements
each system are not necessarily exact equivalents; therefore, to
for Test Methods for Construction Materials
ensure conformance with the standard, each system shall be
C702 PracticeforReducingSamplesofAggregatetoTesting
used independently of the other, and values from the two
Size
systems shall not be combined.
D75 Practice for Sampling Aggregates
E11 Specification for Woven Wire Test Sieve Cloth and Test
NOTE 2—Sieve size is identified by its standard designation in Speci-
Sieves
fication E11. The Alternative designation given in parentheses is for
information only and does not represent a different standard sieve size.
3. Terminology
1.3 This standard does not purport to address all of the
3.1 Definitions—For definitions of terms used in this test
safety concerns, if any, associated with its use. It is the
method, refer to Terminology C125.
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
4. Summary of Test Method
mine the applicability of regulatory limitations prior to use.
4.1 This test is a measure of degradation of mineral aggre-
1.4 This international standard was developed in accor-
gates of standard gradings resulting from a combination of
dance with internationally recognized principles on standard-
actions including abrasion or attrition, impact, and grinding in
ization established in the Decision on Principles for the
a rotating steel drum containing a specified number of steel
Development of International Standards, Guides and Recom-
spheres, the number depending upon the grading of the test
mendations issued by the World Trade Organization Technical
sample. As the drum rotates, a shelf plate picks up the sample
Barriers to Trade (TBT) Committee.
and the steel spheres, carrying them around until they are
dropped to the opposite side of the drum, creating an impact-
crushing effect. The contents then roll within the drum with an
1
This test method is under the jurisdiction of ASTM Committee C09 on
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
2
C09.20 on Aggregates. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Feb. 15, 2020. Published April 2020. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1937. Last previous edition approved in 2014 as C131/C131M – 14. Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/C0131_C0131M-20. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C131/C131M − 20
abrading and grinding action until the shelf plate picks up the Fig. 1, shall be used. The machine shall consist of a hollow
1
sample and the steel spheres, and the cycle is repeated. After st
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM 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: C131/C131M − 14 C131/C131M − 20
Standard Test Method for
Resistance to Degradation of Small-Size Coarse Aggregate
1
by Abrasion and Impact in the Los Angeles Machine
This standard is issued under the fixed designation C131/C131M; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
1
1.1 This test method covers a procedure for testing of coarse aggregates with a maximum size smaller than 37.5 mm ([1 ⁄2 in.]
for resistance to degradation using the Los Angeles testing machine (Note 1).
3
NOTE 1—A procedure for testing coarse aggregate larger than 19.0 mm [ ⁄4 in.] is covered in Test Method C535. Thus coarse aggregates with a
3 1
maximum size between 19 mm [ ⁄4 in.] and 37.5 mm [1 ⁄2 in.] may be tested by Test Method C535 or Test Method C131/C131M.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used
independently of the other, and values from the two systems shall not be combined.
NOTE 2—Sieve size is identified by its standard designation in Specification E11. The Alternative designation given in parentheses is for information
only and does not represent a different standard sieve size.
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 safety, health, and healthenvironmental 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.
2. Referenced Documents
2
2.1 ASTM Standards:
A6/A6M Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling
C125 Terminology Relating to Concrete and Concrete Aggregates
C136 Test Method for Sieve Analysis of Fine and Coarse Aggregates
C535 Test Method for Resistance to Degradation of Large-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles
Machine
C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
C702 Practice for Reducing Samples of Aggregate to Testing Size
D75 Practice for Sampling Aggregates
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
3. Terminology
3.1 Definitions—For definitions of terms used in this test method, refer to Terminology C125.
4. Summary of Test Method
4.1 This test is a measure of degradation of mineral aggregates of standard gradings resulting from a combination of actions
including abrasion or attrition, impact, and grinding in a rotating steel drum containing a specified number of steel spheres, the
1
This test method is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee C09.20 on
Normal Weight Aggregates.
Current edition approved July 1, 2014Feb. 15, 2020. Published July 2014April 2020. Originally approved in 1937. Last previous edition approved in 20062014 as
C131C131/C131M – 14. – 06. DOI: 10.1520/C0131_C0131M-14.10.1520/C0131_C0131M-20.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM 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.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C131/C131M − 20
number depending upon the grading of the test sample. As the drum rotates, a shelf plate picks up the sample and the steel spheres,
carrying them around until they are dropped to the opposite side of the drum, creating an impact-crushing effect. The contents
...
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