BS EN 1097-2:2020

This document describes the reference method, the Los Angeles test, used for type testing and in case of dispute (and an alternative method, the impact test) for determining the resistance to fragmentation of coarse aggregates (main text) and aggregates for railway ballast (AnnexA). For other purposes, in particular factory production control, other methods are possible provided that an appropriate working relationship with the reference method has been established.This document applies to natural, manufactured or recycled aggregates used in building and civil engineering.AnnexA describes a method for the determination of resistance to fragmentation of aggregates for railway ballast.AnnexB gives alternative narrow range classifications for the Los Angeles test and the impact test.AnnexC contains construction, operation and safety requirements for the impact tester.AnnexD describes a method for checking of the impact tester.AnnexE gives precision data.AnnexF contains a worked example of calculation of impact value SZ.AnnexG gives an alternative narrow range classification for the Los Angeles test of16/32mm recycled aggregates.AnnexH proposes an additional sieve for the evaluation of the Los Angeles test for railway ballast.AnnexA is normative and AnnexesB to H are informative.