EN 17685-1:2023

SLOVENSKI STANDARD
01-julij-2023
Zemeljska dela - Kemijski preskusi - 1. del: Določanje deleža žaroizgube
Earthworks - Chemical tests - Part 1: Determination of loss on ignition
Erdarbeiten - Chemische Prüfverfahren - Teil 1: Bestimmung des Glühverlusts
Terrassements - Essais chimiques - Partie 1 : Détermination de la perte au feu
Ta slovenski standard je istoveten z: EN 17685-1:2023
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 17685-1
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2023
EUROPÄISCHE NORM
ICS 13.080.99; 93.020
English Version
Earthworks - Chemical tests - Part 1: Determination of loss
on ignition
Terrassements - Essais chimiques - Partie 1 : Erdarbeiten - Chemische Prüfverfahren - Teil 1:
Détermination de la perte au feu Bestimmung des Glühverlusts
This European Standard was approved by CEN on 23 January 2023.

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, Türkiye 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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17685-1:2023 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 Abbreviations and symbols . 5
5 Principle of the test . 6
6 Apparatus . 6
7 Pretreatment . 7
8 Test procedure . 8
9 Expression of results and determination of the loss on ignition . 8
10 Test report . 9
Annex A (informative) Example of a test data sheet .10
Annex B (informative) Estimation of the organic matter content of clayey soils .11
Bibliography .12

European foreword
This document (EN 17685-1:2023) 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 September 2023, and conflicting national standards shall
be withdrawn at the latest by September 2023.
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, Türkiye and the United
Kingdom.
Introduction
The method described in this document has been developed from EN 15935:2021 which was prepared
by CEN/TC 444 “Environmental characterization of solid matrices”. Adjustments were made to make the
method more suitable for the materials used in earthworks, particularly for the pretreatment of the
sample.
This document specifies a method for the determination of the loss on ignition (w ) of fine, intermediate,
LOI
composite and coarse soils, organic soils and anthropogenic materials (according to EN 16907-2) after
ignition under air at 550°C. A method is given in Annex B in order to estimate the organic matter content
(C ) from the value of w . The organic matter content C is used for the classification of soils with
OM LOI OM
organic matter content C greater than 2 % according EN 16907-2 (Table 4 in EN 16907-2:2018).
OM
Other methods to estimate the organic content is e.g. wet burning with H O or KMnO .
2 2 4
1 Scope
This document specifies 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.
NOTE 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, sulfides 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
OM
w for clayey 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 ISO 17892-12, Geotechnical investigation and testing - Laboratory testing of soil - Part 12:
Determination of liquid and plastic limits (ISO 17892-12)
ISO 3310-1, Test sieves — Technical requirements and testing — Part 1: Test sieves of metal wire cloth
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology 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
4 Abbreviations and symbols
dimensionless
C Organic matter content, deduced from w
OM LOI
(%)
D
Maximum diameter of particles in a soil mass mm
max
LOI Loss On Ignition
m
Mass of the empty crucible g
c
m
Mass of the crucible containing the dried sample g
m
Mass of the crucible containing the ignited sample g
dimensionless
w
Liquid limit according to EN ISO 17892-12
L
(%)
Loss on ignition: Mass fraction lost by burning up a dried sample to constant dimensionless
w
LOI
mass at a specified temperature (%)
Residue on ignition: Mass fraction remaining after burning up a dried sample to dimensionless
w
R
(%)
constant mass at a specified temperature
5 Principle of the test
A weighted dried test portion is burned in a furnace to constant mass at (550 ± 25) °C under air. The
difference in mass before and after the ignition process is used to calculate the loss on ignition. The
determination is performed on a dried sample.
NOTE 1 Carbon
...