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Standard Test Method for Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine
NORMA vydaná dňa 15.2.2020
Označenie normy: ASTM C131/C131M-20
Dátum vydania normy: 15.2.2020
Kód tovaru: NS-991705
Počet strán: 5
Približná hmotnosť: 15 g (0.03 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
abrasion, aggregate (coarse, small size), degradation, impact, Los Angeles machine,, ICS Number Code 91.100.30 (Concrete and concrete products)
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. |
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1. 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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2. Referenced Documents | ||||||||||||||||
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