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EVS-EN 933-9:2022

Tests for geometrical properties of aggregates - Part 9: Assessment of fines - Methylene blue test

General information

Valid from 15.03.2022
Base Documents
EN 933-9:2022
Directives or regulations
None

Standard history

Status
Date
Type
Name
15.03.2022
Main
01.03.2019
Corrigendum
06.05.2013
Main + amendment
This document specifies the reference method used for type testing and in cases of dispute, for the
determination of the methylene blue value of the size 0/2 mm fraction in fine aggregates or all-in
aggregates (MB). It also specifies the reference method for the determination of the methylene blue
value of the size 0/0,125 mm fraction (MBF) in normative Annex A. Other methods can be used for other
purposes, such as factory production control, provided that an appropriate working relationship with
the suitable reference method has been established.
Annex B specifies the preparation of 10 g/l methylene blue solution and Annex C specifies the
procedure for the determination of the methylene blue value of kaolinite (MBk). Annexes B and C are
normative.
A conformity check, adding a single quantity of dye solution equivalent to a specified limiting value and
which can be used as part of a production control process, is described in informative Annex D.
An example of a test data sheet is given in informative Annex E.
WARNING – The use of this part of EN 933 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 the
standard, and fulfil statutory and regulatory requirements for this purpose.

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