EN 12504-1:2019
(Main)Testing concrete in structures - Part 1: Cored specimens - Taking, examining and testing in compression
Testing concrete in structures - Part 1: Cored specimens - Taking, examining and testing in compression
This document specifies a method for taking cores from hardened concrete, their examination, preparation for testing and determination of compressive strength.
This document does not give guidance on the decision to drill cores or on the locations for drilling.
This document does not provide procedures for interpreting the core strength results.
For the assessment of in situ compressive strength in structures and precast concrete components, EN 13791 may be used.
Prüfung von Beton in Bauwerken - Teil 1: Bohrkernproben - Herstellung, Untersuchung und Prüfung der Druckfestigkeit
Dieses Dokument legt ein Verfahren zur Entnahme von Bohrkernen aus Festbeton, deren Untersuchung sowie deren Vorbereitung für die Prüfung und für die Bestimmung der Druckfestigkeit fest.
Dieses Dokument enthält keine Anleitungen für die Entscheidung zur Entnahme von Bohrkernen oder für die Entnahmestellen.
Dieses Dokument enthält keine Verfahren für die Auswertung der Ergebnisse der Festigkeit von Bohrkernen.
Zur Bewertung der Druckfestigkeit von Beton in Bauwerken oder in Bauwerksteilen darf EN 13791 angewendet werden.
Essais pour béton dans les structures - Partie 1 : Carottes - Prélèvement, examen et essais en compression
Le présent document spécifie une méthode qui permet d’effectuer le prélèvement de carottes de béton durci, de les examiner, de les préparer avant l’essai et de déterminer leur résistance à la compression.
Le présent document ne fournit pas de recommandations quant à la pertinence de l’extraction de carottes ou à l’emplacement des carottages dans l’ouvrage.
Il ne spécifie pas de modes opératoires pour l’interprétation des résultats des essais de résistance effectués sur les carottes.
Pour évaluer sur site la résistance à la compression des structures et des éléments préfabriqués en béton, l’EN 13791 peut être utilisée.
Preskušanje betona v konstrukcijah - 1. del: Izvrtani preskušanci - Jemanje, pregled in tlačni preskus
Ta evropski standard določa metodo jemanja preskušancev, izvrtanih iz strjenega betona, njihovega pregleda, priprave na preskušanje in določanja tlačne trdnosti.
OPOMBA 1: Ta evropski standard ne podaja napotkov za odločitev o vrtanju preskušancev ali o lokacijah za vrtanje.
OPOMBA 2: Ta evropski standard ne določa postopkov za razlago rezultatov trdnosti preskušancev.
OPOMBA 3: Za ocenjevanje in-situ tlačne trdnosti v konstrukcijah in montažnih betonskih elementih se lahko uporablja standard EN 13791.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-2019
Nadomešča:
SIST EN 12504-1:2009
Preskušanje betona v konstrukcijah - 1. del: Izvrtani preskušanci - Jemanje,
pregled in tlačni preskus
Testing concrete in structures - Part 1: Cored specimens - Taking, examining and testing
in compression
Prüfung von Beton in Bauwerken - Teil 1: Bohrkernproben - Herstellung, Untersuchung
und Prüfung der Druckfestigkeit
Essais pour béton dans les structures - Partie 1 : Carottes - Prélèvement, examen et
essais en compression
Ta slovenski standard je istoveten z: EN 12504-1:2019
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.
EN 12504-1
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2019
EUROPÄISCHE NORM
ICS 91.100.30 Supersedes EN 12504-1:2009
English Version
Testing concrete in structures - Part 1: Cored specimens -
Taking, examining and testing in compression
Essais pour béton dans les structures - Partie 1 : Prüfung von Beton in Bauwerken - Teil 1:
Carottes - Prélèvement, examen et essais en Bohrkernproben - Herstellung, Untersuchung und
compression Prüfung der Druckfestigkeit
This European Standard was approved by CEN on 29 April 2019.
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, 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
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12504-1:2019 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Principle . 4
5 Apparatus . 4
6 Taking cores . 5
6.1 General . 5
6.2 Location . 5
6.3 Drilling . 5
6.4 Length of cores . 5
6.5 Marking and identification . 5
7 Examination . 6
7.1 Visual inspection . 6
7.2 Measurements . 6
8 Preparation of cores. 6
8.1 General . 6
8.2 Length/diameter ratios . 7
8.3 Tolerances . 7
9 Compression test . 7
9.1 Storage . 7
9.2 Testing . 7
10 Expression of results . 8
11 Test report . 8
12 Precision . 8
Annex A The effect of aggregate size and core diameter on core specimen strength . 9
Bibliography . 10
European foreword
This document (EN 12504-1:2019) has been prepared by Technical Committee CEN/TC 104 “Concrete
and related products”, the secretariat of which is held by SN.
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 December 2019, and conflicting national standards
shall be withdrawn at the latest by December 2019.
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 supersedes EN 12504-1:2009.
It is recognized good practice to include measurement of density prior to the determination of
compressive strength, as a check on compaction of the concrete.
In drafting the standard consideration has been given to the results of the research programme, part
funded by the EC under the Measurement and Testing Programme, contract MAT1-CT94-0043.
The standard includes simple guidance on the process of taking cores, but does not consider a sampling
plan. It also provides procedures for visual examination and compressive strength testing, but not the
interpretation of the results.
This standard is one of a series on testing concrete.
EN 12504, Testing concrete in structures, consists of the following parts:
— Part 1: Cored specimens – Taking, examining and testing in compression;
— Part 2: Non-destructive testing – Determination of rebound number;
— Part 3: Determination of pull-out force;
— Part 4: Determination of ultrasonic pulse velocity.
This edition includes the following significant technical changes with respect to EN 12504-1:2009:
a) editorial revisions;
b) measurement of core dimensions;
c) core samples to be tested in an in situ or wet conditions;
d) procedures for preparation of specimens prior to testing.
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, 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 the United Kingdom.
1 Scope
This document specifies a method for taking cores from hardened concrete, their examination,
preparation for testing and determination of compressive strength.
This document does not give guidance on the decision to drill cores or on the locations for drilling.
This document does not provide procedures for interpreting the core strength results.
For the assessment of in situ compressive strength in structures and precast concrete components,
EN 13791 may be used.
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 12390-1, Testing hardened concrete — Part 1: Shape, dimensions and other requirements for
specimens and moulds
EN 12390-3:2019, Testing hardened concrete — Part 3: Compressive strength of test specimens
EN 12390-4, Testing hardened concrete — Part 4: Compressive strength — Specification for testing
machines
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
4 Principle
Cores extracted using a core drill are carefully examined, prepared by grinding or capping and tested in
compression using standard procedures.
5 Apparatus
5.1 Core drill, equipment capable of extracting cores from the hardened concrete to the dimensions
set out in 6.4 to the tolerances set out in 8.3.
5.2 Compression testing machine, conforming to EN 12390-4 and related to the size of specimens
and their expected failure load.
NOTE Concrete compression testing machines conforming to EN 12390–4 may need to be adapted to test
cores (see the Foreword of EN 12390–4).
5.3 Balance or scale, capable of determining the mass of the core, as tested, to a maximum
permissible error of 0,1 % of the mass.
5.4 Callipers and/or rules, capable of measuring the dimensions of the core and the steel
reinforcement to a maximum permissible error of 1 %.
5.5 Gauge, capable of establishing that the relevant flatness of the specimen is within the
requirements of 8.3 c).
5.6 Squares and gauges (or other means), capable of establishing that the perpendicularity and
straightness of specimens are within the requirements of 8.3 d) and 8.3 e).
6 Taking cores
6.1 General
The aggregate size has a significant influence on the measured strength when the core diameter divided
by the upper aggregate size is less than about 3.
It is essential that full consideration is given to the aims of the testing and the interpretation of the data,
before deciding to drill cores.
NOTE 1 Informative Annex A provides information on the effect of aggregate size and core diameter on the
strength of core specimens.
NOTE 2 See EN 13791 for requirements relating to core testing for compressive strength assessment.
6.2 Location
Consider any structural implications resulting from taking a core prior to drilling.
Cores should be taken at points away from joints or edges of the concrete element and where there is
little or no reinforcement.
6.3 Drilling
Unless otherwise specified, drill the cores perpendicular to the surface in such a manner as not to
damage the cores. Keep the drill rigidly positioned during coring.
Drilling through reinforcement shall be avoided wherever possible.
If transverse reinforcement is encountered, record its diameter and position in mm.
Ensure that cores for determination of compressive strength do not contain any reinforcing bars in, or
close to, the direction of the longitudinal axis. Any such core shall be rejected and a replacement core
taken.
6.4 Length of cores
In deciding the length of cores to be taken for strength testing, take into account:
a) the diameter of the core;
b) the possible method of adjustment;
c) whether comparison is to be made with cube strength or cylinder strength.
6.5 Marking and identification
Immediately after drilling, clearly and indelibly mark each core. Record its location and orientation
within the element from which it has been drilled. If a core is subsequently cut to produce a number of
specimens, mark each specimen to indicate its position and orientation within the original core.
The core shall be surface dried with a dry cloth or paper towel and then placed in a sealed container to
avoid moisture exchange with the environ
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