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BS EN 1097-1:2023 – TC:2024 Edition

BS EN 1097-1:2023 – TC:2024 Edition

$186.33

Tracked Changes. Tests for mechanical and physical properties of aggregates – Determination of the resistance to wear (micro-Deval)

Published By Publication Date Number of Pages
BSI 2024 56
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This document specifies the reference method used for type testing and in case of dispute, for determining the resistance to wear of coarse aggregates (main text) and aggregates for railway ballast (Annex A) by abrasion in the micro-Deval apparatus. Other methods can be used for other purposes, such as factory production control, provided that an appropriate working relationship with the relevant reference method has been established. This document applies to natural, manufactured, recycled or lightweight (LWA) aggregates. NOTE This document does not apply to all types of LWA. The reference test is performed with the addition of water. Annex B gives details of how the test can be performed without the addition of water. Annex A specifies the method to determine the resistance to wear of aggregates for railway ballast without abrasive charge. Annex C specifies the test performed with alternative narrow size fractions. Annexes D and E specify methods for determining the wear of fine aggregates. Precision data for the reference test method are given in Annex F. Annex A is normative and Annexes B, C, D, E and F are informative. WARNING – The use of this part of EN 1097 can involve hazardous materials, operations and equipment (such as dust, noise and heavy lifts). It does not purport to address all of the safety or environmental problems associated with its use. It is the responsibility of users of this document to take appropriate measures to ensure the safety and health of personnel and the environment prior to application of this document, and fulfil statutory and regulatory requirements for this purpose.

PDF Catalog

PDF Pages PDF Title
1 30485835
31 A-30426140
32 undefined
37 1 Scope
2 Normative references
38 3 Terms and definitions
4 Principle
39 5 Apparatus
40 6 Preparation of test portion
41 7 Test procedure
8 Calculation and expression of results
42 9 Test report
9.1 Required data
9.2 Optional data
43 Annex A (normative)Determination of the resistance to wear (micro-Deval) of railway ballast
A.1 General
A.2 Principle
A.3 Apparatus
A.4 Preparation of the test portion
44 A.5 Test procedure
A.6 Calculation and expression of results
45 Annex B (informative)Determination of micro-Deval coefficient in the dry condition
B.1 General
B.2 Preparation of the test specimens
B.3 Test procedure
B.4 Calculation and expression of results
B.5 Test report
46 Annex C (informative)Alternative narrow size fractions for the micro-Deval test
47 Annex D (informative)Determination of the abrasion coefficient of size fraction 0,25/5,6 mm
D.1 Principle
D.2 Apparatus
D.3 Preparation of test portion
48 D.4 Test procedure
D.5 Calculation and expression of results
49 D.6 Precision data
D.7 Test report
50 Annex E (informative)Determination of the friability coefficient of size fraction 0,2/2 mm (or 0,2/4 mm)
E.1 Principle
E.2 Apparatus
51 E.3 Preparation of test portion and abrasive charge
E.3.1 Test portion
E.3.2 Abrasive charge
E.4 Test procedure
52 E.5 Calculation and expression of results
E.6 Precision data
E.7 Test report
53 Annex F (informative)Precision for the reference test method

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BS EN 1097-1:2023 - TC
$186.33