EN 1097-1:2011

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Preparation of the test specimens
7 Test procedure
8 Calculation and expression of results
9 Test report
Annex A (normative) - Determination of the resistance to wear
        (micro-Deval) of railway ballast
Annex B (informative) - Determination of micro-Deval coefficient
        in the dry condition
Annex C (informative) - Alternative narrow range classification
        for the micro-Deval test
Annex D (informative) - Precision
Bibliography

This European Standard describes 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). For other purposes, in particular factory production control, other methods may be used provided that an appropriate working relationship with the reference method has been established. The sample is normally tested in a wet condition, but the test may also be carried out in a dry condition. This European Standard applies to natural, manufactured or recycled aggregates used in building or civil engineering.