prEN 12390-11
(Main)Testing hardened concrete - Part 11: Determination of the chloride resistance of concrete, unidirectional diffusion
Testing hardened concrete - Part 11: Determination of the chloride resistance of concrete, unidirectional diffusion
This document describes a method for determining the unidirectional apparent chloride diffusion coefficient and surface concentration of conditioned specimens of hardened concrete. The test method enables the determination of the chloride penetration after a specified length of curing and length of exposure to NaCl solution.
Since resistance to chloride penetration depends on ageing which includes the effects of continual hydration and interactions with the chloride solution, then the apparent diffusion coefficient also changes with age. A procedure to determine this ageing, expressed here by an ageing exponent, is included in this document and described in Annex A.
The test procedure does not apply to concrete with surface treatments such as silanes and it does not apply to concrete containing fibres (see E.1).
Prüfung von Festbeton - Teil 11: Bestimmung des Chloridwiderstandes von Beton – Einseitig gerichtete Diffusion
Dieses Dokument beschreibt ein Verfahren zur Bestimmung des einseitig gerichteten scheinbaren Chloriddiffusionskoeffizienten und der Oberflächen-Chloridkonzentration von konditionierten Probekörpern aus Festbeton. Das Prüfverfahren ermöglicht die Bestimmung der Chlorideindringung nach einer festgelegten Lagerungsdauer und einer festgelegten Dauer der Einwirkung einer NaCl Lösung.
Da der Widerstand gegen Chlorideindringung von der Alterung abhängt, die die Auswirkungen von fortschreitender Hydratation und Wechselwirkungen mit der Chloridlösung umfasst, ändert sich der scheinbare Diffusionskoeffizient ebenfalls mit dem Alter. Ein Verfahren zur Bestimmung dieser Alterung, hier durch einen Alterungsexponenten ausgedrückt, ist in diesem Dokument ebenfalls enthalten und in Anhang A beschrieben.
Das Prüfverfahren gilt nicht für Beton mit Oberflächenbehandlungen, wie z. B. mit Silanen, und es gilt nicht für faserhaltige Betone (siehe E.1).
Essais pour béton durci - Partie 11 : Détermination de la résistance du béton à la pénétration des chlorures, diffusion unidirectionnelle
Le présent document décrit une méthode de détermination du coefficient de diffusion unidirectionnelle apparent des chlorures et de la concentration de surface d’éprouvettes conditionnées de béton durci. Cette méthode d’essai permet de déterminer la pénétration des chlorures après des durées spécifiées de cure et d’exposition à une solution de NaCl.
La résistance à la pénétration des chlorures dépendant du vieillissement, notamment des effets de la poursuite de l’hydratation et des interactions avec la solution de chlorures, le coefficient de diffusion apparent varie également avec l’âge. Un mode opératoire de détermination de ce vieillissement, exprimé ici par un exposant de vieillissement, est inclus dans le présent document et décrit à l’Annexe A.
Le mode opératoire d’essai ne s’applique pas à des bétons ayant subi des traitements de surface, tels que les silanes, et il ne s’applique pas à un béton contenant des fibres (voir E.1).
Preskušanje strjenega betona - 11. del: Določanje odpornosti betona proti kloridom, enosmerna difuzija
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2025
Preskušanje strjenega betona - 11. del: Določanje odpornosti betona proti
kloridom, enosmerna difuzija
Testing hardened concrete - Part 11: Determination of the chloride resistance of
concrete, unidirectional diffusion
Prüfung von Festbeton - Teil 11: Bestimmung des Chloridwiderstandes von Beton –
Einseitig gerichtete Diffusion
Essais pour béton durci - Partie 11 : Détermination de la résistance du béton à la
pénétration des chlorures, diffusion unidirectionnelle
Ta slovenski standard je istoveten z: prEN 12390-11
ICS:
91.100.30 Beton in betonski izdelki Concrete and concrete
products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2025
ICS 91.100.30 Will supersede EN 12390-11:2015
English Version
Testing hardened concrete - Part 11: Determination of the
chloride resistance of concrete, unidirectional diffusion
Essais pour béton durci - Partie 11 : Détermination de Prüfung von Festbeton - Teil 11: Bestimmung des
la résistance du béton à la pénétration des chlorures, Chloridwiderstandes von Beton - Einseitig gerichtete
diffusion unidirectionnelle Diffusion
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 104.
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, Türkiye 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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12390-11:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
Introduction . 5
Annex A (normative) Procedure to determine the ageing exponent . 21
A.1 General . 21
A.2 Procedure to determine the ageing exponent . 22
A.3 Test report . 22
A.4 Illustration of the procedure . 23
Annex B (informative) Core test specimen . 24
Annex C (normative) Immersion method for large specimens . 26
Annex D (informative) Guidance on the test procedure . 27
D.1 Guidance on suitable concretes types . 27
D.2 Guidance on the selection of the exposure solution . 27
D.3 Curve-fitting to the error-function solution to Fick’s 2nd law . 27
Annex E (informative) Examples for calibration of the calculation procedure for regression
analysis . 29
E.1 Introduction . 29
E.2 Chloride profile 1 . 30
E.3 Chloride profile 2 . 31
E.4 Chloride profile 3 . 32
Bibliography . 34
European foreword
This document (prEN 12390-11:2025) has been prepared by Technical Committee CEN/TC 104
“Concrete and related products”, the secretariat of which is held by SN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 12390-11:2015.
EN 12390-11:2015:
— the property non-steady-state diffusion coefficient, D has been replaced by the time dependent
nss
apparent diffusion coefficient, D (t). D in EN 12390-11:2015 equals D (90 d) in this document;
app nss app
— the surface chloride concentration, C is made time dependent C (t). C in EN 12390-11:2015 equals
s s s
C (90 d) in this document;
s
— In Clause 4 the water curing period of 28 days has been the reference curing period;
— In Clause 4 the exposure period of 90 days has been the reference period of exposure;
— In Clause 6 the requirement for vacuum saturation is removed;
— A new Annex A “Procedure to determine the ageing exponent” is introduced;
— EN 12390-11:2015 Annexes A and C are removed.
The EN 12390 series, under the general title Testing hardened concrete, consists of the following parts:
— Part 1: Shape, dimensions and other requirements for specimens and moulds
— Part 2: Making and curing specimens for strength tests
— Part 3: Compressive strength of test specimens
— Part 4: Compressive strength - Specification for testing machines
— Part 5: Flexural strength of test specimens
— Part 6: Tensile splitting strength of test specimens
— Part 7: Density of hardened concrete
— Part 8: Depth of penetration of water under pressure
— Part 9: Freeze–thaw resistance with de-icing salts - Scaling (Technical Specification)
— Part 10: Determination of the carbonation resistance of concrete at atmospheric levels of carbon
dioxide
— Part 11: Determination of the chloride resistance of concrete, unidirectional diffusion
— Pert 12: Determination of the carbonation resistance of concrete – Accelerated carbonation method
— Part 13: Determination of the secant modulus of elasticity in compression
— Part 14: Semi-adiabatic method for the determination of heat released by concrete during its
hardening process
— Part 15: Adiabatic method for the determination of heat released by concrete during its hardening
process
— Part 16: Determination of the shrinkage of concrete
— Part 17: Determination of creep of concrete in compression
— Part 18: Determination of the chloride migration coefficient
— Part 19: Determination of electrical resistivity
Introduction
Steel reinforced concrete structures exposed to the ingress of chloride, either from seawater or other
sources, need to be durable for at least the intended design service life. The possibility of reinforcement
corrosion is significantly increased as the chloride level at the embedded reinforcement increases. For
this reason, the chloride diffusivity or penetrability of the concrete is an important property to measure.
This document sets out a test method, which is applicable to specimens cast or core specimens, to
assess the potential chloride resistance properties of a concrete mix after a given reference period of
exposure to the chloride-rich environment.
A method is also set out in this document, in order to assess how this potential resistance to chlorides
changes with prolonged periods of exposure (determination of the ageing exponent).
Specifications regarding the test procedure to determine the ageing exponent of the concrete is given in
Annex A
Specifications regarding the test procedure with core specimens are given in Annex B.
NOTE This test method takes a minimum of 118 d comprising a minimum age of the specimen prior to testing
of 28 days and then 90 d to expose the specimen to the chloride solution.
This test method is one of a series concerned with testing concrete. At the behest of CEN, RILEM
reviewed chloride testing methods [1] and this document is based on their recommendations. In
addition, this document draws on recommendations from the EU-project “Chlortest” 5th Framework
Programme (GRD1-2002-71808/G6RD-CT-2002-00855) [2] immersion test recommendation as well as
the Nordtest Method NT Build 443 Concrete, hardened: Accelerated Chloride penetration [3].
1 Scope
This document describes a method for determining the unidirectional apparent chloride diffusion
coefficient and surface concentration of conditioned specimens of hardened concrete. The test method
enables the determination of the chloride penetration after a specified length of curing and length of
exposure to NaCl solution.
Since resistance to chloride penetration depends on ageing which includes the effects of continual
hydration and interactions with the chloride solution, then the apparent diffusion coefficient also
changes with age. A procedure to determine this ageing, expressed here by an ageing exponent, is
included in this document and described in Annex A.
The test procedure does not apply to concrete with surface treatments such as silanes and it does not
apply to concrete containing fibres (see E.1).
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 12390-2, Testing hardened concrete - Part 2: Making and curing specimens for strength tests
EN 14629, Products and systems for the protection and repair of concrete structures - Test methods -
Determination of chloride content in hardened concrete
3 Term, definitions, symbols and abbreviated terms
For the purposes of this document, the following terms, definitions, symbols and abbreviated terms
apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
3.1 Terms and definitions
3.1.1
as-cast surface
surface of a concrete element exposed in the construction works to a chloride environment
3.1.2
chloride content
amount of acid-soluble chloride expressed in percent by mass of concrete
3.1.3
chloride penetration
ingress of chlorides into concrete due to exposure to external chloride sources
3.1.4
diffusion
movement of molecules or ions under a concentration gradient, that is movement from a zone of high
concentration to a zone with a lower concentration
3.1.5
diffusion coefficient
proportionality between the molecular flux (e.g. rate of flow of chloride ions) and the concentration
gradient in the diffusion equation
Note 1 to entry: In this document a modified Fick’s Law is adopted.
3.1.6
initial chloride content
C
i
chloride content at a distance sufficiently remote from the exposed surface as to not have been
influenced by penetration of the chloride exposure solution
Note 1 to entry: It reflects the initial chloride content that came from the constituents when the concrete was
mixed.
3.1.7
apparent diffusion coefficient
D (t)
app
constant equivalent diffusion coefficient giving similar chloride profile as the measured one for a
structure exposed to the chloride environment over a period t
[SOURCE: ISO 16204:2012]
3.1.8
profile grinding
dry process grinding a concrete specimen in thin successive layers
3.1.9
ageing exponent
α
parameter indicating the decrease over time of the apparent diffusion coefficient
Note 1 to entry: The ageing exponent is mathematically defined in Formula A.2
3.2 Symbols and abbreviated terms
α Ageing exponent
C Initial chloride content, % by mass of concrete;
i
C Measured chloride content of concrete layer j, % by mass of concrete
m,j
C Chloride content of layer j calculated according to Formula (1
...
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