oSIST prEN 17685-1:2021

Earthworks - Chemical tests - Part 1: Determination of organic matter content by loss on ignition

This document describes a method for the determination of the loss on ignition (wLOI) of fine, intermediate, composite and coarse soils, organic soils and anthropogenic materials (according to EN 16907-2) after ignition under air at 550°C.
The loss of mass suffered by these materials at 550 °C is usually due to the release of volatile compounds, water (absorbed, crystalized or structural) and gases from decomposition of organic matter and inorganic substances such as sulfur, sulphides or hydroxides (e.g. H2O, CO2, SO2).
A method is given in Annex B in order to estimate the organic matter content (COM) from the value of wLOI for clayed soils.

Erdarbeiten — Chemische Prüfverfahren — Teil 1: Bestimmung des Gehalts an organischen Stoffen durch Glühverlust

Dieses Dokument definiert ein Verfahren zur Bestimmung des Glühverlustes (wLOI) von feinkörnigen, gemischtkörnigen, zusammengesetzten und grobkörnigen Böden, organischen Böden und anthropogenen Materialien (nach EN 16907-2) nach Entzündung an Luft bei 550 °C.
Der Massenverlust, den diese Materialien bei 550 °C aufweisen, ist in der Regel auf die Freisetzung von flüchtigen Verbindungen, Wasser (absorbiert, kristallisiert oder gebunden) und Gasen aus der Zersetzung von organischer Substanz und anorganischen Stoffen wie Schwefel, Sulfiden oder Hydroxiden (z. B. H2O, CO2, SO2) zurückzuführen.
In Anhang B wird ein Verfahren angegeben, um den Gehalt an organischer Substanz (COM) aus dem Wert wLOI für tonige Böden abzuschätzen.

Terrassements — Essais chimiques — Partie 1 : Détermination de la teneur en matière organique par perte au feu

Ce document décrit une méthode pour la détermination de la perte au feu (wLOI) des sols fins, intermédiaires, composites et grossiers, des sols organiques et des matériaux anthropiques (selon la norme EN 16907-2) après calcination sous air à 550°C.
La perte de masse subie par ces matériaux à 550 °C est généralement due à la libération de composés volatils, d'eau (absorbée, cristallisée ou structurelle) et de gaz provenant de la décomposition de la matière organique et de substances inorganiques telles que le soufre, les sulfures ou les hydroxydes (par exemple H20, CO2, SO2).
Une méthode est donnée dans l'annexe B afin d'estimer la teneur en matière organique (COM) à partir de la valeur du wLOI pour les sols argileux.

Zemeljska dela - Kemijski preskusi - 1. del: Določanje deleža organskih snovi pri žaroizgubi

General Information

• Status: Not Published
• Public Enquiry End Date: 14-Sep-2021
• ICS: 13.080.99 - Other standards related to soil quality
• ICS: 93.020 - Earthworks. Excavations. Foundation construction. Underground works
• Technical Committee: ZEM - Earthworks
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 07-Jul-2021
• Due Date: 24-Nov-2021
• Ref Project: prEN 17685-1 - Earthworks - Chemical tests - Part 1: Determination of organic matter content by loss on ignition

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN 17685-1:2021
01-september-2021

Zemeljska dela - Kemijski preskusi - 1. del: Določanje deleža organskih snovi pri

žaroizgubi

Earthworks - Chemical tests - Part 1: Determination of organic matter content by loss on

ignition
Erdarbeiten — Chemische Prüfverfahren — Teil 1: Bestimmung des Gehalts an
organischen Stoffen durch Glühverlust

Terrassements — Essais chimiques — Partie 1 : Détermination de la teneur en matière

organique par perte au feu
Ta slovenski standard je istoveten z: prEN 17685-1
ICS:
13.080.99 Drugi standardi v zvezi s Other standards related to
kakovostjo tal soil quality
93.020 Zemeljska dela. Izkopavanja. Earthworks. Excavations.
Gradnja temeljev. Dela pod Foundation construction.
zemljo Underground works
oSIST prEN 17685-1:2021 en,fr,de

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

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oSIST prEN 17685-1:2021
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oSIST prEN 17685-1:2021
DRAFT
EUROPEAN STANDARD
prEN 17685-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2021
ICS 13.080.99; 93.020
English Version
Earthworks - Chemical tests - Part 1: Determination of
organic matter content by loss on ignition

Terrassements - Essais chimiques - Partie 1 : Erdarbeiten - Chemische Tests - Teil 1: Bestimmung

Détermination de la teneur en matière organique par des Gehalts an organischen Stoffen durch Glühverlust

perte au feu

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

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17685-1:2021 E

worldwide for CEN national Members.
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oSIST prEN 17685-1:2021
prEN 17685-1:2021 (E)
Contents Page

European foreword ............................................................................................................................................ 3

Introduction .......................................................................................................................................................... 4

1 Scope .......................................................................................................................................................... 5

2 Normative references .......................................................................................................................... 5

3 Terms and definitions ......................................................................................................................... 5

4 Abbreviations and symbols ............................................................................................................... 5

5 Principle of the test .............................................................................................................................. 6

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

7 Pretreatment .......................................................................................................................................... 7

8 Test procedure ....................................................................................................................................... 7

9 Expression of results and determination of the loss on ignition ......................................... 8

10 Test report ............................................................................................................................................... 8

Annex A (informative) Example of a test data sheet ........................................................................... 10

Annex B (normative) Determination of the organic matter content of clayed soils ................ 11

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oSIST prEN 17685-1:2021
prEN 17685-1:2021 (E)
European foreword

This document (prEN 17685-1:2021) 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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oSIST prEN 17685-1:2021
prEN 17685-1:2021 (E)
Introduction

This document describes a method for the determination of the loss on ignition (w ) of fine,

LOI

intermediate, composite and coarse soils, organic soils and anthropogenic materials (according to

EN 16907-2) after ignition under air at 550°C. Methods are given in Annex B in order to estimate the

organic matter content (C ) from the value of w .
OM LOI
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oSIST prEN 17685-1:2021
prEN 17685-1:2021 (E)
1 Scope

This document describes a method for the determination of the loss on ignition (w ) of fine,

LOI

intermediate, composite and coarse soils, organic soils and anthropogenic materials (according to

EN 16907-2) after ignition under air at 550°C.

The loss of mass suffered by these materials at 550 °C is usually due to the release of volatile compounds,

water (absorbed, crystalized or structural) and gases from decomposition of organic matter and

inorganic substances such as sulfur, sulphides or hydroxides (e.g. H O, CO , SO ).

2 2 2

A method is given in Annex B in order to estimate the organic matter content (C ) from the value of

w for clayed soils.
LOI
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

ISO 3310-1, Test sieves — Technical requirements and testing — Part 1: Test sieves of metal wire cloth

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 https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
constant mass

successive weightings after drying at least 1h apart not differing by more than 0,1 %

4 Abbreviations and symbols
Abbreviations for terms and tests
LOI Loss of ignition
COM Organic Matter Content
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oSIST prEN 17685-1:2021
prEN 17685-1:2021 (E)
Symbols for Quantities
C Organic matter content, deduced from w
dimensionless (%)
OM LOI
Maximum diameter of particles in a soil mass mm
max
mass of the empty crucible g
mass of the crucible containing the dried sample g
mass of the crucible containing the ignited sample g
Liquid limit dimensionless (%)
Loss of ignition: Mass fraction lost by burning up a
dried sample to constant mass at a specified dimensionless (%)
LOI
temperature
Residue of ignition : Mass fraction remaining after
burning up a dried sample to constant mass at a dimensionless (%)
specified temperature
5 Principle of the test

A weighted dried test portion is burned in a furnace to constant mass at 550 °C ± 25 °C under air. The

difference in mass be
...