CEN/TR 17172:2022
(Main)Validation testing program on chloride penetration and carbonation standardized test methods
Validation testing program on chloride penetration and carbonation standardized test methods
The objective of the document consists in testing concrete mixes complying with EN 206 for particular aggressive environments with the test methods being standardized by TC 51/WG 12 on chloride penetration and carbonation in order to verify their robustness and coherence.
Validierungsprogramm für genormte Prüfverfahren zur Bestimmung der Chlorideindringung und der Karbonatisierung
Programme d'essai de validation des méthodes d'essai normalisées relatives à la pénétration des chlorures et à la carbonatation
Program validacije standardizirane preskusne metode za preskušanje penetracije kloridov in karbonatizacije
Predmet tega dokumenta je preskušanje betonskih mešanic, ki ustrezajo standardu EN 206, v posebej agresivnih okoljih s preskusnimi metodami, standardiziranimi v skladu z določili TC 51/WG 12 za penetracijo kloridov in karbonatizacijo, za namene preverjanja njihove trdnosti in skladnosti.
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2022
Program validacije standardizirane preskusne metode za preskušanje penetracije
kloridov in karbonatizacije
Validation testing program on chloride penetration and carbonation standardized test
methods
Validierungsprogramm für genormte Prüfverfahren zur Bestimmung der
Chlorideindringung und der Karbonatisierung
Programme d'essai de validation des méthodes d'essai normalisées relatives à la
pénétration des chlorures et à la carbonatation
Ta slovenski standard je istoveten z: CEN/TR 17172:2022
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.
CEN/TR 17172
TECHNICAL REPORT
RAPPORT TECHNIQUE
June 2022
TECHNISCHER BERICHT
ICS 91.100.30 Supersedes CEN/TR 17172:2018
English Version
Validation testing program on chloride penetration and
carbonation standardized test methods
Programme d'essai de validation des méthodes d'essai Validierungsprogramm für genormte Prüfverfahren
normalisées relatives à la pénétration des chlorures et zur Bestimmung der Chlorideindringung und der
à la carbonatation Karbonatisierung
This Technical Report was approved by CEN on 24 May 2022. It has been drawn up by the Technical Committee CEN/TC 104.
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. CEN/TR 17172:2022 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 Concretes and specimens . 5
5 Participating laboratories. 6
6 Testing program . 7
7 Statistical analysis . 7
8 Results . 8
8.1 Accelerated carbonation test prEN 12390-12 . 8
8.2 Remarks from laboratories participating to the testing procedure CEN/TS 12390-12
(ACA) . 9
9 Natural carbonation CEN/TS 12390-10 (NCA) . 9
9.1 Natural carbonation . 9
9.2 Penetration depth dk . 9
9.3 Summary of precision parameters of dk (mm) . 14
9.4 Carbonation rate . 15
0.5
9.5 Summary of precision parameters of carbonation rate k (mm/year ) . 19
CO
10 Chloride diffusion test EN 12390-11 . 21
10.1 General . 21
10.2 Precision parameters of the surface concentration C . 26
s
10.3 Summary of precision data of D (m /s) and C (% by concrete mass) . 28
nss s
11 Regression coefficients of the profile fitting procedure . 29
11.1 Regression coefficients R of the fitting of the error function into the chloride
profiles . 29
Annex A (informative) Concretes and specimens prepared . 32
A.1 General . 32
A.2 Labelling and working program . 36
Annex B (informative) Chloride profiles and their diffusion fitting parameters . 38
Annex C (informative) Climates in-or-near the places where natural carbonation was made . 57
European foreword
This document (CEN/TR 17172:2022) has been prepared by Technical Committee CEN/TC 104
“Concrete and related products”, the secretariat of which is held by DIN.
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.
This document reports the data obtained in the Validation Testing Program (VTP) on chloride
penetration and carbonation organized by CEN/TC 51/WG 12 starting from 2009 as from document
CEN/TC 51/WG 12 – Doc. N 229/2009, where the preparation of specimens, the collection of results and
the statistical analysis were performed by the Institute of Construction Sciences “Eduardo Torroja” of the
CSIC of Spain, IETcc–CSIC, under the managing activities of Prof. Carmen Andrade.
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.
Introduction
The procedure for the determination of chloride penetration is described in EN 12390-11:2015, “Testing
hardened concrete — Determination of the chloride resistance of concrete — Unidirectional diffusion” and
it has been published by CEN. The method is based on natural diffusion; a concentration profile after
90 days of contact with the chloride solution is used to fit Fick’s law in order to calculate the chloride
surface concentration, C and the non-steady-state chloride diffusion coefficient, D . The method
s nss
specifies three different modes of contact of the salt solution with one face of the specimen, immersion
(DCL1), ponding (DCL2) and inversion (DCL3).
CEN/TC 51/WG 12 has also produced two methods addressed to the determination of the carbonation
resistance of the concrete, the first one refers to natural condition and has been published as
CEN/TS 12390-10, “Testing hardened concrete — Part 10: Determination of the relative carbonation
resistance of the concrete“, the second one, referring to accelerated condition, has been prepared by
1)
CEN/TC 51/WG 12/TG 5, but it has been disapproved by National Members at Formal Vote CEN TCA .
The upgrading to EN standard of the aforesaid documents should require as first step the evaluation of
robustness and precision data.
Having in mind these needs, CEN/TC 51/WG 12 organized a “Validation Testing Program (VTP) on
chloride penetration and carbonation” for the preliminary evaluation of the robustness and the precision
data of the test methods.
For the scope of the present work as robustness is intended the sensitivity of the test method to a
composition change of concrete that are expected to produce an appreciable change in related
performance.
1)
FprCEN/TS 12390-12:2010, Testing hardened concrete — Part 12: Determination of the potential carbonation
resistance of concrete: Accelerated carbonation method.
1 Scope
The objective of the report consists in testing concrete mixes for particular aggressive environments with
the test methods being standardized by TC51/WG12 on chloride penetration and carbonation in order
to verify their robustness and coherence.
NOTE See EN 206 for additional information.
2 Normative References
There are no normative references in this document.
3 Terms and Definitions
No terms and definitions are listed in this document.
4 Concretes and specimens
For the VTP four concrete mixes were designed considering the limiting values indicated in Table F.1 of
EN 206 and the scope of assessing the robustness of the methods.
Three composition parameters (cement type, w/c ratio and cement content) were suitably chosen.
The following cement type and class were chosen: CEM II/A-LL 42.5 R and CEM II/B-V 32.5 R.
The w/c ratio was intentionally changed to substantially affect the concrete performances.
3 3
Two cement contents were used, the first one (300 kg/m ) for carbonation, the second one (350 kg/m )
for chloride penetration.
Aggregate “round shaped” of siliceous nature and with a maximum diameter of 14 mm was used. In
Table 1 the composition of concrete mixes is shown.
The use of superplasticizer admixture was modulated, where necessary, to obtain a slump class S3
(100 mm – 150 mm). Table 1 gives the nominal proportions of the mixes used.
Table 1 — Proportions and cement types of the mixes prepared
CARBONATION CHLORIDE
MIX 1 MIX 2 MIX 3 MIX 4 MIX 5 MIX 6 MIX 7 MIX 8
Cement type CEM II/A-LL 42.5R CEM II/B-V 32.5R CEM II/A-LL 42.5R CEM II/B-V 32.5R
295 296 296 300 345 351 349 357
Cement amount (kg/m )
144 173 144 175 137 173 138 176
Water (l/m )
w/c ratio 0,49 0,58 0,49 0,58 0,4 0,49 0,4 0,49
1 049 1 011 1 054 1 025 1 005 977 1 019 993
Gravel (kg/m )
857 827 861 838 816 793 827 806
Sand (kg/m )
Superplasticizer
0,60 0,20 0,50 0,15 0,79 0,23 0,57 0,10
(% cement weight)
CARBONATION CHLORIDE
MIX 1 MIX 2 MIX 3 MIX 4 MIX 5 MIX 6 MIX 7 MIX 8
Cement type CEM II/A-LL 42.5R CEM II/B-V 32.5R CEM II/A-LL 42.5R CEM II/B-V 32.5R
2 260 2 265 2 294 2 285 2 273 2 313 2 330 2 330
Density (kg/dm )
Air content (%) 5,75 4,9 5,15 3,75 5,7 3,8 4,4 2,3
Slump (cm) 11 10 12 10 10 10 13,5 10
For each laboratory and test method 2 cubes (150 mm) were produced.
In Annex A a summary of the experimental details of the preparation of the specimens and their
submission is described. It is worth noting that the specimen preparation was centralized in one
laboratory (IETcc) in order to have a better homogeneity.
5 Participating laboratories
Fourteen laboratories from different European countries participating in the VTP are indicated in Table 2
with the tests methods they performed.
Table 2 — List of laboratories participating in the exercise with the test types they perform
NATURAL ACCELERATED DIFFUSION CHLORIDE
CARBONATION CARBONATION PENETRATION
COUNTRY LABORATORY
NCA1 NCA2 ACA DCL1 DCL2 DCL3
France Lafarge X X
France LRPC X
Spain University of Alicante X X
Spain IETcc X X X X X X
Belgium CRIC X X
The
KEMA X X X
Netherlands
The
TNO X X X
Netherlands
The
SGS INTRON X X X X
Netherlands
United
Dundee University X X X X
Kingdom
Sweden CBI X X
Germany FIZ/VDZ X X X X
Italy Polytechnic Milan X X X X X
Poland ISCMOIB/OMMB X X
6 Testing program
The tests performed are summarized in Table 3.
Table 3 — Test methods and standards used in the program
Test methods Reference Methodology Label
a
At 4 % of CO
Accelerated carbonation ACA
Natural exposure NCA1
b
Natural carbonation CEN/TS 12390-10
c
Climatic chamber NCA2
Immersion DCL1
Chloride diffusion EN 12390-11 Ponding DCL2
Inversion DCL3
a
The draft test method used for this research received a negative vote and the Work Item was withdrawn;
however it was published by BSI as BS 1881-210. A new accelerated test is being prepared for standardization
with the main change being a carbon dioxide concentration of 3 %. The robustness and precision determined
by the research is expected to be the same as for the test method under development.
b
The procedure described in CEN/TS 12390-10:2007 differs from the method followed in the present report.
CEN/TS 12390-10 prescribes that test specimens shall be tested when they have reached the 50 % of the
compressive strength of the r
...
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