oSIST prEN 17542-3:2020

Earthworks - Geotechnical laboratory tests - Part 3: Methylene blue value VBS on soils and rocks

This document describes the reference method for the determination of the methylene blue value (VBS) 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 absorbed 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 VBS test uses common equipment and calibration as the methylene blue test MB for aggregates (EN 933 9), but the test is 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.

Erdarbeiten - Geotechnische Laborversuche - Teil 3: Methylenblauwert VBS an Boden und Fels

Dieses Dokument beschreibt das Referenzverfahren für die Bestimmung des Methylenblau-Werts (VBS) in Böden und Fels für Erdarbeiten.
Die Prüfung basiert auf der Messung der Menge an Methylenblau, die von dem in Wasser gelösten Material adsorbiert werden kann. Diese Menge an adsorbiertem Methylenblau wird als direkter Proportionalwert im Verhältnis zum 0/50 mm-Boden angegeben. Der Blauwert des Bodens steht in direktem Zusammenhang mit der spezifischen Oberfläche der Bodenkörner oder des Felsmaterials.
ANMERKUNG   Das VBS Verfahren verwendet die gleiche Ausrüstung und Kalibrierung wie das Methylenblau-Verfahren MB für Gesteinskörnungen (EN 933-9), aber das Verfahren wird auf eine andere Kornklasse angewendet (5 mm bei VBS bzw. 2 mm bei MB). Daher können im allgemeinen Fall die mit den beiden Verfahren erzielten Ergebnisse nicht verglichen werden.

Terrassements - Essais géotechniques en laboratoire - Partie 3 : Valeur de bleu de méthylène VBS d’un sol ou d’une roche

Le présent document décrit la méthode de référence pour la détermination de la valeur de bleu de méthylène (VBS) d’un sol ou d’une roche pour les terrassements.
L’essai est basé sur la mesure de la quantité de bleu de méthylène qui peut être adsorbée par le matériau en suspension dans l’eau. Cette quantité est rapportée par proportionnalité directe à la fraction 0/50 mm. La valeur de bleu d’un sol est directement liée à la surface spécifique des particules du sol ou du matériau rocheux.
NOTE   L’essai VBS utilise des équipements communs et l’étalonnage décrits pour l’essai au bleu de méthylène MB des granulats (EN 933-9), mais il s’applique à une autre fraction granulaire (respectivement 5 mm pour VBS et 2 mm pour MB). Ainsi, les résultats obtenus par les deux méthodes d’essai ne sont pas comparables dans le cas général.

Zemeljska dela - Geotehnični laboratorijski preskusi - 3. del: Vrednost metilen modro VBS zemljin in kamnin

General Information

• Status: Not Published
• Public Enquiry End Date: 19-Sep-2020
• ICS: 93.020 - Earthworks. Excavations. Foundation construction. Underground works
• Technical Committee: ZEM - Zemeljska dela
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 28-Jul-2020
• Due Date: 15-Dec-2020
• Completion Date: 13-Oct-2020
• Ref Project: prEN 17542-3 - Earthworks - Geotechnical laboratory tests - Part 3: Methylene blue value VBS on soils and rocks

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN 17542-3:2020
01-september-2020
Zemeljska dela - Geotehnični laboratorijski preskusi - 3. del: Vrednost metilen
modro 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: prEN 17542-3
ICS:
93.020 Zemeljska dela. Izkopavanja. Earthworks. Excavations.
Gradnja temeljev. Dela pod Foundation construction.
zemljo Underground works
oSIST prEN 17542-3:2020 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 17542-3:2020
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oSIST prEN 17542-3:2020
DRAFT
EUROPEAN STANDARD
prEN 17542-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2020
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 draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 396.

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 17542-3:2020 E

worldwide for CEN national Members.
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oSIST prEN 17542-3:2020
prEN 17542-3:2020 (E)
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 Reagents ................................................................................................................................................... 6

5.1 Dye solution ............................................................................................................................................ 6

5.2 Preparation of 10 g/l methylene blue solution.......................................................................... 6

6 Apparatus ................................................................................................................................................ 7

7 Preparation of the test portions ...................................................................................................... 7

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 ........................................................................ 9

9 Calculation and expression of results ......................................................................................... 10

10 Test report ............................................................................................................................................. 10

Annex A (informative) Example of a test data sheet ............................................................................. 11

Bibliography ....................................................................................................................................................... 12

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oSIST prEN 17542-3:2020
prEN 17542-3:2020 (E)
European foreword

This document (prEN 17542-3:2020) has been prepared by Technical Committee CEN/TC 396

“Earthworks”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
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Introduction

The Methylene blue value V on soils and rocks is an identification parameter adopted in the

classification of materials for earthworks (EN 16907-2). It is also used for providing some specifications

for construction procedures (EN 16907-3).
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1 Scope

This document describes the reference method for the determination of the methylene blue value (V )

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 absorbed 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

(EN 933-9), but the test 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)
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
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
max
maximum dimension of the largest elements contained in the soil
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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 gram of the 0/50 mm fraction tested.
5 Reagents
5.1 Dye solution
Solution of standard or technical quality methylene blue, (10,0 ± 0,1) g/l.
5.2 Preparation of 10 g/l methylene blue solution
5.2.1 Use methylene blue; (C H CIN S, nH 0 (n = 2 to 3) purity ≥ 98,5 %).
16 18 3 2
5.2.2 Determine the water content W of the methylene blue powder as follows:

— weigh approximately 5 g of methylene blue powder and record the mass to the nearest 0,01 g as M ;

— 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 .

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 from the following equation:

W = (M — M )/M
b h g g
where
M is the mass of the methylene blue powder, in grams;
M is the mass of the dried methylene blue powder, in grams.
The powder used to determine the moisture content shall not be reused.

The water content shall be determined for the preparation of every new batch of dye solution.

5.2.3 Take a mass of methylene blue powder of (10 × (1 + W ) ± 0,01) g (equivalent to 10 g of dry

powder).

5.2.4 Warm 500 ml to 700 ml of distilled or demineralized water in a beaker. If warm water is used, the

temperature shall not exceed 50 °C.

5.2.5 Agitate the contents of the beaker whilst slowly pouring the methylene blue powder into the

water, until complete dissolution of the powder.

5.2.6 Pour into a flask of capacity (1 000 ± 5) ml, rinsing with distilled or demineralized water to ensure

complete transfer of all dye into the flask. Make sure that the flask and the water are at a temperature

of (20 ± 1) °C to conform with the calibration of the flask and add more distilled or demineralized water

to the (1 000 ± 5) ml graduation mark.
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5.2.7 Shake the flask to ensure complete dissolution of the powder. Keep the prepare

...