SIST EN 933-9:2022
(Main)Tests for geometrical properties of aggregates - Part 9: Assessment of fines - Methylene blue test
Tests for geometrical properties of aggregates - Part 9: Assessment of fines - Methylene blue test
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 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 0/0,125 mm fraction (MBF) in 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.
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 B.
Annex C specifies the preparation of 10 g/l methylene blue solution and Annex D specifies the procedure for the determination of the methylene blue value of kaolinite (MBk). Annexes C and D are normative.
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.
Prüfverfahren für geometrische Eigenschaften von Gesteinskörnungen - Teil 9: Beurteilung von Feinanteilen - Methylenblau-Verfahren
Dieses Dokument legt das für die Erstprüfung und in Streitfällen anzuwendende Referenzverfahren für die Bestimmung des Methylenblau-Werts für die Korngrößenfraktion 0/2 mm in feinen Gesteinskörnungen oder Gesteinskörnungsgemischen (MB) fest. Ferner wird in Anhang A ein Referenzverfahren für die Bestimmung des Methylenblau‑Werts für die Korngrößenfraktion 0/0,125 mm (MBF) festgelegt. Für andere Zwecke, wie die werkseigene Produktionskontrolle, können andere Verfahren angewendet werden, sofern ein ausreichender Zusammenhang zum Referenzverfahren nachgewiesen wurde.
Im informativen Anhang B wird eine Konformitätsprüfung beschrieben, bei der eine einzelne Menge Farbstoff-Lösung äquivalent zu einem festgelegten Grenzwert zugeführt wird. Diese Prüfung kann als Teil einer werkseigenen Produktionskontrolle angewendet werden.
Anhang C legt die Herstellung von 10 g/l Methylenblau-Lösung fest. Anhang D legt das Verfahren zur Bestimmung des Methylenblau-Werts von Kaolinit (MBk) fest. Anhang C und Anhang D sind normativ.
Ein Beispiel für ein Prüfprotokoll ist im informativen Anhang E enthalten.
WARNUNG – Die Durchführung der in diesem Teil von EN 933 beschriebenen Referenzverfahren kann gefährliche Materialien, Verfahrensschritte oder Gerätschaften (wie Staub, Lärm und Hebezeuge) umfassen. Dieses Dokument erhebt nicht den Anspruch, auf alle mit seiner Anwendung verbunden Sicherheits oder Umweltgefährdungen hinzuweisen. Es liegt in der Verantwortung des Anwenders dieses Dokuments, vor der Anwendung geeignete Maßnahmen für die Sicherheit und den Gesundheitsschutz des Personals sowie für den Umweltschutz zu ergreifen und dafür Sorge zu tragen, dass behördliche und gesetzliche Maßnahmen eingehalten werden.
Essais pour déterminer les caractéristiques géométriques des granulats - Partie 9 : Qualification des fines - Essais au bleu de méthylène
Le présent document spécifie la méthode de référence utilisée pour les essais de type initiaux et, en cas de litige, pour déterminer la valeur de bleu de méthylène de la fraction 0/2 mm dans les sables ou les graves (MB). Elle spécifie aussi la méthode de référence permettant de déterminer la valeur de bleu de méthylène de la fraction 0/0,125 mm (MBF) dans l'Annexe A. D’autres méthodes peuvent être utilisées dans d’autres cas, tels que la maîtrise de la production des granulats, sous réserve qu’une corrélation appropriée avec la méthode de référence ait été établie.
Un contrôle de conformité, consistant à ajouter une seule quantité de solution colorée équivalente à une valeur limite spécifiée et pouvant être utilisée dans le cadre d'un processus de maîtrise de la production, est décrit dans l'annexe B informative.
L'annexe C spécifie la préparation d'une solution de bleu de méthylène à 10 g/l et l'annexe D précise la procédure de détermination de la valeur du bleu de méthylène de la kaolinite (MBk). Les annexes C et D sont normatives.
Un exemple de fiche de données d'essai est donné dans l'annexe informative E.
AVERTISSEMENT - L'utilisation de cette partie de l’EN 933 peut impliquer des matériaux, des opérations et des équipements dangereux (tels que la poussière, le bruit et les charges lourdes). Elle ne prétend pas traiter de tous les problèmes de sécurité ou d'environnement liés à son utilisation. Il est de la responsabilité des utilisateurs de ce document de prendre les mesures appropriées pour assurer la sécurité et la santé du personnel et de l'environnement avant l'application de la norme, et de satisfaire aux exigences légales et réglementaires à cet effet.
Preskusi geometričnih lastnosti agregatov - 9. del: Ugotavljanje finih delcev - Preskus z metilen modrim
Ta dokument določa referenčno metodo, ki se uporablja za tipsko preskušanje in v primeru spora za ugotavljanje vrednosti metilen modrega deleža 0/2 mm v finih agregatih ali mešanih agregatih (MB). Prav tako določa referenčno metodo za ugotavljanje vrednosti metilen modrega deleža 0/0,125 mm (MBF) v dodatku A. Za druge namene, na primer za kontrolo proizvodnje v obratu, se lahko uporabijo druge metode, če obstaja primerna delovna povezava z ustrezno referenčno metodo.
Preverjanje skladnosti z dodajanjem enotne količine raztopine barvila, ki ustreza določeni mejni vrednosti in se lahko uporablja kot del postopka kontrole proizvodnje v obratu, je opisano v informativnem dodatku B.
Dodatek C določa pripravo raztopine 10 g/l metilen modrega, dodatek D pa določa postopek za ugotavljanje vrednosti metilen modrega za kaolinit (MBk). Dodatka C in D sta normativna.
Primer preskusnega podatkovnega lista je podan v informativnem dodatku E.
OPOZORILO: Uporaba tega dela standarda EN 933 lahko vključuje nevarne materiale, postopke in opremo (na primer prah, hrup in dvigovanje težkih bremen). Ni namenjen obravnavi vseh varnostnih ali okoljskih težav, povezanih z njegovo uporabo. Za sprejetje ustreznih ukrepov za zagotavljanje varnosti in zdravja osebja ter okolja pred uporabo standarda ter izpolnjevanje zakonskih in regulativnih zahtev za ta namen so odgovorni uporabniki tega dokumenta.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 933-9:2022
01-julij-2022
Nadomešča:
SIST EN 933-9:2009+A1:2013
Preskusi geometričnih lastnosti agregatov - 9. del: Ugotavljanje finih delcev -
Preskus z metilen modrim
Tests for geometrical properties of aggregates - Part 9: Assessment of fines - Methylene
blue test
Prüfverfahren für geometrische Eigenschaften von Gesteinskörnungen - Teil 9:
Beurteilung von Feinanteilen - Methylenblau-Verfahren
Essais pour déterminer les caractéristiques géométriques des granulats - Partie 9 :
Qualification des fines - Essais au bleu de méthylène
Ta slovenski standard je istoveten z: EN 933-9:2022
ICS:
91.100.15 Mineralni materiali in izdelki Mineral materials and
products
SIST EN 933-9:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 933-9:2022
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SIST EN 933-9:2022
EN 933-9
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2022
EUROPÄISCHE NORM
ICS 91.100.15 Supersedes EN 933-9:2009+A1:2013
English Version
Tests for geometrical properties of aggregates - Part 9:
Assessment of fines - Methylene blue test
Essais pour déterminer les caractéristiques Prüfverfahren für geometrische Eigenschaften von
géométriques des granulats - Partie 9 : Qualification Gesteinskörnungen - Teil 9: Beurteilung von
des fines - Essais au bleu de méthylène Feinanteilen - Methylenblau-Verfahren
This European Standard was approved by CEN on 10 January 2022.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 933-9:2022 E
worldwide for CEN national Members.
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SIST EN 933-9:2022
EN 933-9:2022 (E)
Contents Page
European foreword . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Principle . 6
5 Reagents . 6
6 Apparatus . 7
7 Preparation of test portion. 8
7.1 General . 8
7.2 Preparation without pre-drying . 8
7.3 Preparation with pre-drying . 9
8 Procedure . 9
8.1 Preparation of suspension . 9
8.2 Stain test . 9
Figure 1 — Flow chart of test procedure . 11
9 Calculation and expression of results. 12
10 Test report . 12
10.1 Required data . 12
10.2 Optional data . 13
Annex A (normative) Determination of the methylene blue value of the size 0/0,125 mm
fraction (MB ) . 14
F
A.1 Procedure . 14
A.2 Calculation and expression of results. 14
A.3 Test report . 14
Annex B (normative) Preparation of 10 g/l methylene blue solution . 15
B.1 Procedure . 15
B.2 Storage . 16
) . 17
Annex C (normative) Determination of the methylene blue value of kaolinite (MBK
C.1 General . 17
C.2 Procedure . 17
C.3 Calculation and expression of results. 17
Annex D (informative) Test of conformity in relation to a specified MB value . 18
Annex E (informative) Example of a test data sheet . 19
2
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SIST EN 933-9:2022
EN 933-9:2022 (E)
European foreword
This document (EN 933-9:2022) has been prepared by Technical Committee CEN/TC 154 “Aggregates”,
the secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by August 2022, and conflicting national standards shall
be withdrawn at the latest by August 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 933-9:2009+A1:2013.
In comparison with the previous edition, the following technical modifications have been made:
a) Normative references has been extended with EN 933-2 which is referenced in 6.1.7 Test sieves;
b) Terms and definitions has been extended with the definition of laboratory sample;
c) Clause 6 Apparatus has been restructured into two subclauses (6.1 general and 6.2 special), due to
special apparatus (tinted glass bottle) used in former Annex C;
d) the test sieves in 6.1.7 are extended with 0,125 mm, which is used in normative Annex A;
e) the note in former Clause 6.4 about alternative types of mixers has been transformed to main text;
f) pre-drying temperature has been increased to (110 ± 5) °C for natural and manufactured
aggregates (Clause 7) and the clause has been divided into General, Preparation without pre-drying
and Preparation with pre-drying;
g) the procedure has been clarified with restructured text and an illustrating figure (Clause 8);
h) the Scope, the Terms and definitions and the Test report content have been adapted to the current
rules and the text has been clarified;
i) the order of annexes has been changed, to place the normative annexes first;
j) the note in former Annex D, containing recommendations about checking of MB , has been
K
transformed to main text in a new Clause C.1 General;
k) Annex A and former Annexes C and D have been restructured;
l) the titles of Annex A and former Annex D have been shortened;
m) the row numbers in Annex E have been deleted.
This document forms part of a series of tests for geometrical properties of aggregates. Test methods for
other properties of aggregates are covered by the following European Standards:
— EN 932 (all parts), Tests for general properties of aggregates
— EN 1097 (all parts), Tests for mechanical and physical properties of aggregates
— EN 1367 (all parts), Tests for thermal and weathering properties of aggregates
3
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SIST EN 933-9:2022
EN 933-9:2022 (E)
— EN 1744 (all parts), Tests for chemical properties of aggregates
— EN 13179 (all parts), Tests for filler aggregate used in bituminous mixtures
The other parts of EN 933 include:
— Part 1: Determination of particle size distribution — Sieving method
— Part 2: Determination of particle size distribution — Test sieves, nominal size of apertures
— Part 3: Determination of particle shape — Flakiness index
— Part 4: Determination of particle shape — Shape index
— Part 5: Determination of percentage of crushed and broken surfaces in coarse aggregate particles
— Part 6: Assessment of surface characteristics — Flow coefficient of aggregates
— Part 7: Determination of shell content — Percentage of shells in coarse aggregates
— Part 8: Assessment of fines — Sand equivalent test
— Part 10: Assessment of fines — Grading of filler aggregates (air jet sieving)
— Part 11: Classification test for the constituents of coarse recycled aggregate
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
4
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SIST EN 933-9:2022
EN 933-9:2022 (E)
1 Scope
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 (MB ) in normative Annex A. Other methods can be used for other
F
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 (MB ). Annexes B and C are
k
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.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 932-2, Tests for general properties of aggregates - Part 2: Methods for reducing laboratory samples
EN 932-5, Tests for general properties of aggregates - Part 5: Common equipment and calibration
EN 933-2, Tests for geometrical properties of aggregates - Part 2: Determination of particle size
distribution - Test sieves, nominal size of apertures
3 Terms and definitions
For the purposes of this document the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/ui
— IEC Electropedia: available at https://www.electropedia.org/
3.1
laboratory sample
sample intended for laboratory testing
3.2
subsample
sample obtained by means of a sample reduction procedure
5
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SIST EN 933-9:2022
EN 933-9:2022 (E)
3.3
test portion
d /D
0 0
sample used as a whole in a single test
3.4
fines
particle size fraction of an aggregate which passes the 0,063 mm sieve
3.5
particle size fraction
d /D
i i
fraction of an aggregate passing the larger (D ) of two sieves and retained on the smaller (d )
i i
Note 1 to entry: The lower limit can be zero.
3.6
constant mass
mass determined after successive weighings at least 1 h apart not differing by more than 0,1 %
Note 1 to entry: In many cases constant mass can be achieved after a test portion has been dried for a pre-
determined period in a specified oven at (110 ± 5) °C. Test laboratories can determine the time required to achieve
constant mass for specific types and sizes of sample dependent upon the drying capacity of the oven used.
4 Principle
Increments of a methylene blue solution are added successively to a test portion suspended in water.
The adsorption of dye solution, by potential clay minerals in the test portion, is checked after each
addition of solution. This is done by carrying out a stain test on filter paper to detect the presence of
free dye, which indicates that adsorption is complete.
When the presence of free dye is confirmed, the methylene blue value (MB or MB ) is calculated and
F
expressed as grams of dye adsorbed per kilogram of the size fraction tested.
NOTE 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 Annex D.
5 Reagents
5.1 Dye solution, solution of standard or technical quality methylene blue, (10,0 ± 0,1) g/l (see
Annex B). The solution shall not be used more than 28 days after preparation. It shall be stored in a dark
place.
5.2 Distilled or demineralized water.
5.3 Kaolinite, of known methylene blue value MB (see Annex C).
K
NOTE Kaolinite of MB value between 1 g and 2 g per 100 g of kaolinite is preferable in order to avoid
K
excessive use of dye.
6
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...
SLOVENSKI STANDARD
oSIST prEN 933-9:2020
01-november-2020
Preskusi geometričnih lastnosti agregatov - 9. del: Ugotavljanje finih delcev -
Preskus z metilen modrim
Tests for geometrical properties of aggregates - Part 9: Assessment of fines - Methylene
blue test
Prüfverfahren für geometrische Eigenschaften von Gesteinskörnungen - Teil 9:
Beurteilung von Feinanteilen - Methylenblau-Verfahren
Essais pour déterminer les caractéristiques géométriques des granulats - Partie 9 :
Qualification des fines - Essais au bleu de méthylène
Ta slovenski standard je istoveten z: prEN 933-9
ICS:
91.100.15 Mineralni materiali in izdelki Mineral materials and
products
oSIST prEN 933-9:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 933-9:2020
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oSIST prEN 933-9:2020
DRAFT
EUROPEAN STANDARD
prEN 933-9
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2020
ICS 91.100.15 Will supersede EN 933-9:2009+A1:2013
English Version
Tests for geometrical properties of aggregates - Part 9:
Assessment of fines - Methylene blue test
Essais pour déterminer les caractéristiques Prüfverfahren für geometrische Eigenschaften von
géométriques des granulats - Partie 9 : Qualification Gesteinskörnungen - Teil 9: Beurteilung von
des fines - Essais au bleu de méthylène Feinanteilen - Methylenblau-Verfahren
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 154.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 933-9:2020 E
worldwide for CEN national Members.
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oSIST prEN 933-9:2020
prEN 933-9:2020 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Principle . 5
5 Reagents . 5
6 Apparatus . 5
7 Preparation of test portions. 6
8 Procedure . 6
8.1 Description of the stain test . 6
8.2 Preparation of suspension . 7
8.3 Determination of the quantity of dye adsorbed . 7
9 Calculation and expression of results. 9
10 Test report . 9
10.1 Required data . 9
10.2 Optional data . 10
Annex A (normative) Procedure for the determination of the methylene blue value (MB )
F
of the 0/0,125 mm fraction . 11
Annex B (informative) Test of conformity in relation to a specified MB value . 12
Annex C (normative) Preparation of 10 g/l methylene blue solution . 13
Annex D (normative) Procedure for the determination of the methylene blue value of
kaolinite (MB ) . 15
K
Annex E (informative) Example of a test data sheet . 16
2
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oSIST prEN 933-9:2020
prEN 933-9:2020 (E)
European foreword
This document (prEN 933-9:2020) has been prepared by Technical Committee CEN/TC 154
“Aggregates”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 933-9:2009+A1:2013.
In comparison with the previous edition, the following technical modifications have been made:
a) Pre-drying temperature has been increased for natural and manufactured aggregates (Clause 7);
b) The procedure of stain tests has been clarified (8.3);
c) The test report content has been adapted to the current rules (Clause 10);
d) The note in Annex D, containing recommendations, has been transformed to main text (D.9).
This document forms part of a series of tests for geometrical properties of aggregates. Test methods for
other properties of aggregates are covered by the following European Standards:
— EN 932 (all parts), Tests for general properties of aggregates
— EN 1097 (all parts), Tests for mechanical and physical properties of aggregates
— EN 1367 (all parts), Tests for thermal and weathering properties of aggregates
— EN 1744 (all parts), Tests for chemical properties of aggregates
— EN 13179 (all parts), Tests for filler aggregate used in bituminous mixtures
The other parts of EN 933 include:
— Part 1: Determination of particle size distribution — Sieving method
— Part 2: Determination of particle size distribution — Test sieves, nominal size of apertures
— Part 3: Determination of particle shape — Flakiness index
— Part 4: Determination of particle shape — Shape index
— Part 5: Determination of percentage of crushed particles in coarse and all-in natural aggregates
— Part 6: Assessment of surface characteristics — Flow coefficient for coarse aggregates
— Part 7: Determination of shell content — Percentage of shells in coarse aggregates
— Part 8: Assessment of fines — Sand equivalent test
— Part 10: Assessment of fines — Grading of fillers (air jet sieving)
— Part 11: Classification test for the constituents of coarse recycled aggregates
3
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oSIST prEN 933-9:2020
prEN 933-9:2020 (E)
1 Scope
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 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
0/0,125 mm fraction (MB ) in Annex A. Other methods can be used for other purposes, such as factory
F
production control, provided that an appropriate working relationship with the suitable reference
method has been established.
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 B.
Annex C specifies the preparation of 10 g/l methylene blue solution and Annex D specifies the
procedure for the determination of the methylene blue value of kaolinite (MB ). Annexes C and D are
k
normative.
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.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 932-2, Tests for general properties of aggregates - Part 2: Methods for reducing laboratory samples
EN 932-5, Tests for general properties of aggregates - Part 5: Common equipment and calibration
3 Terms and definitions
For the purposes of this document the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1
subsample
sample obtained by means of a sample reduction procedure
3.2
test portion
d /D
0 0
sample used as a whole in a single test
3.3
fines
particle size fraction of an aggregate which passes the 0,063 mm sieve
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prEN 933-9:2020 (E)
3.4
particle size fraction
d /D
i i
fraction of an aggregate passing the larger (D ) of two sieves and retained on the smaller (d )
i i
Note 1 to entry: The lower limit can be zero.
3.5
constant mass
mass determined after successive weighings at least 1 h apart not differing by more than 0,1 %
Note 1 to entry: In many cases constant mass can be achieved after a test portion has been dried for a pre-
determined period in a specified oven at (110 ± 5) °C. Test laboratories can determine the time required to achieve
constant mass for specific types and sizes of sample dependent upon the drying capacity of the oven used.
4 Principle
Increments of a solution of methylene blue are added successively to a suspension of the test portion in
water. The adsorption of dye solution by the test portion is checked after each addition of solution by
carrying out a stain test on filter paper to detect the presence of free dye.
When the presence of free dye is confirmed, the methylene blue value (MB or MB ) is calculated and
F
expressed as grams of dye adsorbed per kilogram of the size fraction tested.
NOTE 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 Annex B.
5 Reagents
5.1 Dye solution, solution of standard or technical quality methylene blue, (10,0 ± 0,1) g/l (see
Annex C). The maximum period of use of the solution shall be 28 days. It shall be stored away from light.
5.2 Distilled or demineralized water.
5.3 Kaolinite, of known methylene blue value MB (see Annex D).
K
NOTE Kaolinite of MB value between 1 g and 2 g per 100 g of kaolinite is preferable in order to avoid
K
excessive use of dye.
6 Apparatus
All apparatus shall conform to the general requirements of EN 932-5.
6.1 Burette, with capacity of either 100 ml or 50 ml and graduation of either 1/10 ml or 1/5 ml, or
one 5 ml and one 2 ml micro-pipette.
2
6.2 Filter paper, quantitative and ash-free (<0,010 %); 95 g/m ; thickness 0,20 mm; filtration speed
75 s; pore size 8 µm.
6.3 Glass rod, length 300 mm; diameter 8 mm.
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prEN 933-9:2020 (E)
6.4 Impeller agitator, capable of controlled variable rotation rates up to (600 ± 60) r/min with three
or four impeller blades of (75 ± 10) mm diameter.
NOTE Alternative types of mixer can be used if it can be shown that results obtained agree with results
produced using an impeller agitator as specified above.
6.5 Balance, readable to 0,1 % of the mass to be weighed.
6.6 Stopwatch or stopclock, readable to 1 s.
6.7 Test sieve, 2 mm aperture, with guard sieve (if necessary).
6.8 Be
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