prEN 12504-2

Testing concrete in structures - Part 2: Non-destructive testing - Determination of rebound number

This document specifies a method for determining the rebound number of an area of hardened concrete using a spring-driven hammer.
NOTE 1   The rebound number determined by this method can be used to assess the uniformity of concrete in situ, to delineate zones or areas of poor quality or deteriorated concrete in structures.
NOTE 2   The test method is not intended as an alternative for the compressive strength determination of concrete (EN 12390-3), but with suitable correlation, it can provide an estimate of in situ compressive strength. For the assessment of in-situ compressive strength, see EN 13791.
NOTE 3   The hammer can be used for comparative testing, referenced against a concrete with known strength or against a concrete which has been shown that it has come from a defined volume of concrete with a population verified as conforming to a particular strength class.

Prüfung von Beton in Bauwerken - Teil 2: Zerstörungsfreie Prüfung - Bestimmung der Rückprallzahl

Dieses Dokument legt ein Verfahren zur Bestimmung der Rückprallzahl einer Fläche aus Festbeton bei Prüfung mit einem Federhammer fest.
ANMERKUNG 1   Die nach diesem Verfahren bestimmte Rückprallzahl kann für den Nachweis der Gleichmäßigkeit von Ortbeton sowie für die Darstellung von Bereichen oder Flächen geringer Güte oder für beschädigten Beton in Bauwerken verwendet werden.
ANMERKUNG 2   Das Prüfverfahren ist nicht als Alternative für die Bestimmung der Druckfestigkeit von Beton (EN 12390 3) vorgesehen, mit Hilfe geeigneter Korrelationen kann es jedoch einen Schätzwert für die Druckfestigkeit von Ortbeton liefern. Zur Bewertung der Druckfestigkeit von Ortbeton siehe EN 13791.
ANMERKUNG 3   Der Hammer kann zur vergleichenden Prüfung eingesetzt werden; zur Referenz kann ein Beton bekannter Festigkeit oder ein Beton herangezogen werden, der nachweislich von einem definierten Betonvolumen stammt, für dessen Grundgesamtheit die Übereinstimmung mit einer Festigkeitsklasse nachgewiesen wurde.

Essais pour béton dans les structures - Partie 2 : Essais non destructifs - Détermination de l’indice de rebondissement

Le présent document spécifie une méthode de détermination de l’indice de rebondissement d’une surface de béton durci, à l’aide d’un scléromètre projeté par ressort.
NOTE 1   L’indice de rebondissement déterminé à l’aide de la présente méthode peut être utilisé pour évaluer l’homogénéité du béton in situ, pour délimiter, dans des structures, des zones ou des surfaces de béton de qualité médiocre ou détériorées.
NOTE 2   La présente méthode d’essai n’est pas destinée à être une méthode alternative de détermination de la résistance à la compression du béton (EN 12390 3), mais avec une corrélation fiable, elle peut fournir une estimation de la résistance à la compression du béton in situ. Pour l’évaluation de la résistance à la compression in situ, voir l’EN 13791.
NOTE 3   Le scléromètre peut être utilisé pour des essais comparatifs, sur du béton dont la résistance est connue ou sur du béton pour lequel il a été démontré qu’il provient d’un volume défini de béton dont l’ensemble a été vérifié comme étant conforme à une classe de résistance particulière.

Preskušanje betona v konstrukcijah - 2. del: Neporušitveno preskušanje - Ugotavljanje sklerometričnega indeksa

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN 12504-2:2019
01-november-2019
Preskušanje betona v konstrukcijah - 2. del: Neporušitveno preskušanje -
Ugotavljanje sklerometričnega indeksa

Testing concrete in structures - Part 2: Non-destructive testing - Determination of

rebound number

Prüfung von Beton in Bauwerken - Teil 2: Zerstörungsfreie Prüfung - Bestimmung der

Rückprallzahl

Essais pour béton dans les structures - Partie 2 : Essais non destructifs - Détermination

de l’indice de rebondissement
Ta slovenski standard je istoveten z: prEN 12504-2
ICS:
19.100 Neporušitveno preskušanje Non-destructive testing
91.100.30 Beton in betonski izdelki Concrete and concrete
products
oSIST prEN 12504-2:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 12504-2:2019
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oSIST prEN 12504-2:2019
DRAFT
EUROPEAN STANDARD
prEN 12504-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2019
ICS 91.100.30 Will supersede EN 12504-2:2012
English Version
Testing concrete in structures - Part 2: Non-destructive
testing - Determination of rebound number

Essais pour béton dans les structures - Partie 2: Essais Prüfung von Beton in Bauwerken - Teil 2:

non destructifs - Détermination de l'indice de Zerstörungsfreie Prüfung - Bestimmung der

rebondissement Rückprallzahl

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, Turkey 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

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12504-2:2019 E

worldwide for CEN national Members.
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oSIST prEN 12504-2:2019
prEN 12504-2:2019 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

1 Scope .................................................................................................................................................................... 4

2 Normative references .................................................................................................................................... 4

3 Terms and definitions ................................................................................................................................... 4

4 Principle ............................................................................................................................................................. 4

5 Apparatus ........................................................................................................................................................... 4

5.1 Rebound hammer ........................................................................................................................................... 4

5.2 Reference anvil ................................................................................................................................................ 5

5.3 Abrasive stone .................................................................................................................................................. 5

6 Test location ...................................................................................................................................................... 5

6.1 Selection ............................................................................................................................................................. 5

6.2 Preparation ....................................................................................................................................................... 5

7 Procedure........................................................................................................................................................... 6

7.1 Preliminary preparation .............................................................................................................................. 6

7.2 Operations ......................................................................................................................................................... 6

7.3 Reference checking......................................................................................................................................... 6

8 Test result .......................................................................................................................................................... 6

9 Test report ......................................................................................................................................................... 7

10 Precision ............................................................................................................................................................. 7

Bibliography .................................................................................................................................................................... 8

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oSIST prEN 12504-2:2019
prEN 12504-2:2019 (E)
European foreword

This document (prEN 12504-2:2019) 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 is based on the International Standard ISO 1920-7 Testing of concrete – Part 7: Non-

destructive tests on hardened concrete, and reference has been made to ASTM C805 Standard Test Method

for Rebound number of hardened concrete.

This document has been framed around the use of a Type N, spring driven steel hammer, originally

designed by Schmidt.
This document will supersede EN 12504-2:2012.
This document 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.
The following amendments have been made to the former edition:

— a recommendation that two different reference anvils are used for calibrating the equipment.

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oSIST prEN 12504-2:2019
prEN 12504-2:2019 (E)
1 Scope

This document specifies a method for determining the rebound number of an area of hardened concrete

using a spring-driven hammer.

NOTE 1 The rebound number determined by this method can be used to assess the uniformity of concrete in situ,

to delineate zones or areas of poor quality or deteriorated concrete in structures.

NOTE 2 The test method is not intended as an alternative for the compressive strength determination of concret

...