|
SLOVENSKI STANDARD
01-september-2022
Zemeljska dela - Geotehnični laboratorijski preskusi - 3. del: Metilen modro
vrednost VBS zemljin in kamnin
Earthworks - Geotechnical laboratory tests - Part 3: Methylene blue value VBS on soils
and rocks
Erdarbeiten - Geotechnische Laborversuche - Teil 3: Methylenblauwert VBS an Boden
und Fels
Terrassements - Essais géotechniques en laboratoire - Partie 3 : Valeur de bleu de
méthylène VBS d’un sol ou d’une roche
Ta slovenski standard je istoveten z: EN 17542-3:2022
ICS:
93.020 Zemeljska dela. Izkopavanja. Earthworks. Excavations.
Gradnja temeljev. Dela pod Foundation construction.
zemljo Underground works
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 17542-3
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2022
EUROPÄISCHE NORM
ICS 93.020
English Version
Earthworks - Geotechnical laboratory tests - Part 3:
Methylene blue value VBS on soils and rocks
Terrassements - Essais géotechniques en laboratoire - Erdarbeiten - Geotechnische Laborversuche - Teil 3:
Partie 3 : Valeur de bleu de méthylène VBS d'un sol ou Methylenblauwert VBS an Boden und Fels
d'une roche
This European Standard was approved by CEN on 20 April 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 17542-3:2022 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Principle of the test . 6
5 Apparatus . 6
6 Reagents . 7
6.1 Dye solution . 7
6.2 Preparation of 10 g/l methylene blue solution. 7
7 Preparation of the test portions . 8
7.1 If D is greater than 50 mm . 8
max
7.2 If D is ranging between 5 mm and 50 mm. . 8
max
7.3 Washing procedure for materials > 5 mm . 8
7.3.1 Materials concerned . 8
7.3.2 Step 1 – Brushing . 8
7.3.3 Step 2 – Washing. 8
7.4 If D is smaller or equal at 5 mm. . 9
max
8 Procedure . 9
8.1 Description of the stain test . 9
8.2 Preparation of suspension . 9
8.3 Determination of the quantity of dye adsorbed . 10
9 Calculation and expression of results . 10
10 Test report . 11
Annex A (informative) Example of a test data sheet . 12
Table A.1 — Identification of the specimen tested . 12
Table A.2 – Test results . 12
Annex B (informative) Alternative size fraction . 13
Bibliography . 14
European foreword
This document (EN 17542-3:2022) has been prepared by Technical Committee CEN/TC 396
“Earthworks”, the secretariat of which is held by AFNOR.
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 December 2022, and conflicting national standards shall
be withdrawn at the latest by December 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.
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.
Introduction
The Methylene blue value V on soils and rocks is an identification parameter adopted in the
BS
classification of materials for earthworks according to EN 16907-2. It is also used for providing some
specifications for construction procedures according to EN 16907-3.
1 Scope
This document describes the reference method for the determination of the methylene blue value (V )
BS
in soils and rocks for earthworks.
The test is based on measuring the quantity of methylene blue that can be adsorbed by the material
suspended in water. This quantity of adsorbed methylene blue is reported by direct proportionality to
the 0/50 mm ground. The soil blue value is directly related to the specific surface area of the soil particles
or rocky material.
NOTE The V test uses common equipment and calibration as the methylene blue test MB for aggregates
BS
(EN 933-9), but it applies to another granular fraction (5 mm for VBS and 2 mm for MB, respectively). Thus, the
results obtained between the two tests cannot be compared in the general case.
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 ISO 17892-1, Geotechnical investigation and testing - Laboratory testing of soil - Part 1: Determination
of water content (ISO 17892-1)
EN ISO 17892-4, Geotechnical investigation and testing - Laboratory testing of soil - Part 4: Determination
of particle size distribution (ISO 17892-4)
EN ISO 835, Laboratory glassware - Graduated pipettes (ISO 835)
EN ISO 385, Laboratory glassware - Burettes (ISO 385)
EN ISO 3819, Laboratory glassware - Beakers (ISO 3819)
EN ISO 1042, Laboratory glassware - One-mark volumetric flasks (ISO 1042)
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
— IEC Electropedia: available at
3.1
subsample
sample obtained by means of a sample reduction procedure
3.2
test portion
sample used as a whole in a single test
3.3
particle fraction
mass percentage of particles in a range of particle sizes with defined lower and upper diameters referring
to the total mass of particles in a soil volume or sample
EXAMPLES Sand fraction: mass percentage of particles with particle sizes between 0,063 mm and 2,0 mm
3.4
constant mass
successive weightings after drying at least 1h apart not differing by more than 0,1 %
3.5
maximum dimension D
max
maximum dimension of the largest elements contained in the soil
4 Principle of the test
Increments of a solution of methylene blue are added successively to a suspension of the test portion in
water. The adsorption of the dye solution by 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 (dyes are the methylene blue
particles here).
When the presence of free dye is confirmed, the methylene blue value is calculated and expressed as
grams of dye adsorbed per 100 g of the 0/50 mm fraction tested.
5 Apparatus
5.1 Burette or pipette, conforming to EN ISO 385 or EN ISO 835, respectively: a dosing device to inject
volumes of methylen blue solution in steps of 10 ml, 5 ml and 2 ml and to know the total quantity injected
at ± 1 ml.
5.2 White Filter paper, surface mass (95 ± 5) g/m , for quantitative analysis and ash-free (<0,010 %);
thickness (0,20 ± 0,02) mm; filtration speed (75 ± 10) s; pore size (8 ± 5) µm.
5.3 Glass rod, length 300 mm; diameter (8 ± 1) mm.
5.4 Impeller agitator: having a rotational speed covering at least the range of (400 ± 40) r/min
to (600 ± 60) r/min.with three or four impeller blades of (75 ± 5) mm diameter.
5.5 Balance, with a maximum permissible measurement error less than 0,2 % of the weighed mass.
5.6 Stopwatch or stopclock, readable to 1 s.
5.7 Test sieves, 63 µm, 50 mm and 5 mm aperture, with guard sieve (if necessary).
An alternative size fraction is given in Annex B for the preparation of the test sample. Testing other size
fractions may produce results different from those obtained using the reference size fractions. The size
fraction used and the reference to Annex B should then be given in the test report.
5.8 Beaker, conforming to EN ISO 3819, glass or plastic, capacity 3 000 ml minimum and internal
diameter (155 ± 10) mm.
5.9 Flask, class A conforming to EN ISO 1042, glass, capacity 1 000 ml.
5.10 Ventilated oven, thermostatically controlled to maintain a temperature of (100 ± 5) °C.
5.11 Thermometer, readable to 1 °C.
5.12 Spatula.
5.13 Desiccator.
5.14 Closed storage tainted glass bottle, capacity 1 000 ml.
6 Reagents
6.1 Dye solution
Solution of standard or technical quality methylene blue, (10,0 ± 0,1) g/l.
6.2 Preparation of 10 g/l methylene blue solution
6.2.1 Use methylene blue; (C H CIN S, nH O (n = 2 to 3) purity ≥ 98,5 %).
16 18 3 2
6.2.2 Determine the water content w of the methylene blue powder as follows:
b
— weigh approximately 5 g of methylene blue powder and record the mass to the nearest 0,01 g as Mh;
— dry this powder at (100 ± 5) °C to constant mass, at least 2 h. Cool in the desiccator, and then weigh
immediately after taking out of the desiccator. Record the dry mass to the nearest 0,01 g as M .
g
NOTE At temperatures above 105 °C, the chemical structure of the methylene blue powder can be modified.
— calculate and record the water content w to the nearest decimal place fro
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