CEN/TR 17172:2018
(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.
Validierungs-Prüfprogramm für genormte Prüfverfahren 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
Le présent document a pour objectif de tester les formules conformes à l'EN 206 pour les environnements particulièrement agressifs avec les méthodes d'essai normalisées par le TC 51/GT 12 sur la pénétration des chlorures et la carbonatation afin de vérifier leur robustesse et leur cohérence.
Program validacije standardizirane preskusne metode za preskušanje penetracije kloridov in karbonatizacije
V tem dokumentu so navedeni podatki, pridobljeni s programom validacije (VTP) za preskušanje penetracije kloridov in karbonatizacije, ki ga vse od leta 2009 organizira delovna skupina WG 12, pri čemer je pripravo vzorcev, zbiranje rezultatov ter statistično analizo opravil inštitut za gradbeništvo Eduardo Torroja pod okriljem španske ustanove CSIC (IETcc–CSIC) in vodstvom prof. Carmen Andrade.
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Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2018
Program validacije standardizirane preskusne metode za preskušanje penetracije
kloridov in karbonatizacije
Validation testing program on chloride penetration and carbonation standardized test
methods
Validierungs-Prüfprogramm für genormte Prüfverfahren 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 17172:2018
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
September 2018
TECHNISCHER BERICHT
ICS 91.100.30
English Version
Validation testing program on chloride penetration and
carbonation standardized test methods
Programme d'essai de validation des méthodes d'essai Validierungs-Prüfprogramm für genormte
normalisées relatives à la pénétration des chlorures et Prüfverfahren der Chlorideindringung und der
à la carbonatation Karbonatisierung
This Technical Report was approved by CEN on 1 January 2018. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 17172:2018 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Concretes and specimens . 5
3 Participating laboratories. 6
4 Testing program . 6
5 Statistical analysis . 7
6 Results . 7
6.1 Accelerated carbonation test prEN 12390-12 . 7
6.2 Remarks from laboratories participating to the testing procedure CEN/TS 12390-12
(ACA) . 9
7 Natural carbonation CEN/TS 12390-10 (NCA) . 9
7.1 Natural carbonation . 9
7.2 Penetration depth dk . 9
7.3 Summary of precision parameters of dk (mm) . 13
7.4 Carbonation rate . 14
0,5
7.5 Summary of precision parameters of carbonation rate k (mm/year ) . 17
CO
8 Chloride diffusion test EN 12390-11 . 19
8.1 General . 19
8.2 Precision parameters of the Surface concentration C . 23
s
8.3 Summary of precison data of D (m /s) and C (% by concrete mass) . 25
nss s
9 Regression coefficients of the profile fitting procedure . 26
9.1 General . 26
9.2 Regression coefficients R of the fitting of the error function into the chloride
profiles . 26
Annex A (informative) Concretes and specimens prepared . 29
A.1 General . 29
A.2 Labelling and working program . 32
Annex B (informative) Chloride profiles and their diffusion fitting parameters . 34
Annex C (informative) Climates in-or-near the places where natural carbonation was made. 45
European foreword
This document (CEN/TR 17172:2018) 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 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.
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
s nss
method 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 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.
2 Concretes and specimens
For the VTP four concrete mixes were designed considering the limiting values indicated in Table F1 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.
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, were 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 MIX6 MIX7 MIX8
CEM II/A-LL CEM II/B-V
Cement type CEM II/A-LL 42.5R CEM II/B-V 32.5R
42.5R 32.5R
Cement amount
295 296 296 300 345 351 349 357
(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)
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.
3 Participating laboratories
The Laboratories participating in the VTP were 14 of different European countries and 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
4 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
At 4 % of CO
Accelerated carbonation a ACA
Natural exposure NCA1
b
Natural carbonation
CEN/TS 12390-10
c
NCA2
Climatic chamber
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 BS1881-210. 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
in that the CEN/TS 12390-10 prescribes that test specimens shall be tested when they have reached the
50% of the compressive strength of the reference concrete; in the present report there was not reference
concrete as the purpose was not to determine the relative carbonation but the robustness of the testing
procedures.
c
At 350ppm of carbon dioxide. An EN to replace CEN/TS 12390-10 is under development and the most
significant change is to increase the carbon dioxide concentration in the chamber test to 400 ppm. This
change is unlikely to impact the robustness and precision determined by this research.
5 Statistical analysis
The statistical treatment has been made following ISO 5725-2, “Determination of the accuracy (trueness
and precision) of measurement methods and results — Part 2
...
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