EN 13161:2001

SLOVENSKI STANDARD
SIST EN 13161:2002
01-maj-2002
Preskušanje naravnega kamna – Ugotavljanje upogibne trdnosti z obremenitvijo
na tretjinah razpona
Natural stone test methods - Determination of flexural strength under constant moment
Prüfverfahren für Naturstein - Bestimmung der Biegefestigkeit unter Drittellinienlast
Méthodes d'essai pour pierres naturelles - Détermination de la résistance en flexion sous
moment constant
Ta slovenski standard je istoveten z: EN 13161:2001
ICS:
73.020 Rudarstvo in kamnolomsko Mining and quarrying
izkopavanje
91.100.15 Mineralni materiali in izdelki Mineral materials and
products
SIST EN 13161:2002 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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EUROPEAN STANDARD
EN 13161
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2001
ICS 73.020; 91.100.15
English version
Natural stone test methods - Determination of flexural strength
under constant moment
Méthodes d'essai pour pierres naturelles - Détermination Prüfverfahren für Naturstein - Bestimmung der
de la résistance en flexion sous moment constant Biegefestigkeit unter Drittellinienlast
This European Standard was approved by CEN on 29 September 2001.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13161:2001 E
worldwide for CEN national Members.

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EN 13161:2001 (E)
Contents
page
Foreword .3
1 Scope.4
2 Normative references .4
3 Principle .4
4 Symbols .4
5 Apparatus .5
6 Preparation of specimens .5
7 Test procedure.8
8 Expression of the results .9
9 Test report .9
Annex A (normative) Statistical evaluation of the test results .11
Bibliography.14
2

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EN 13161:2001 (E)
Foreword
This European Standard has been prepared by TC 246 "Natural Stone", the secretariat of which is
held by UNI.
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 April 2002, and conflicting national standards shall be
withdrawn at the latest by December 2002.
This draft standard is one of the series of draft standards for tests on natural stone.
Test methods for natural stone consist of the following parts:
Natural stone test methods – Determination of water absorption coefficient by
EN 1925
capillarity.
Natural stone test methods – Determination of compressive strength
EN 1926 .
EN 1936 Natural stone test methods – Determination of real density and apparent density and
of total porosity and open porosity.
EN 12370 Natural stone test methods – Determination of resistance to salt crystallisation.
Natural stone test methods – Determination of flexural strength under concentrated
EN 12372
load.
Natural stone test methods – Determination of frost resistance.
prEN 12371
prEN 12407 Natural stone test methods – Petrographic description.
Natural stone test methods – Determination of the breaking load at a dowel hole
prEN 13364 .
prEN 13373 Natural stone test methods – Determination of geometric characteristics.
Natural stone test methods – Determination of water absorption at atmospheric pressure
prEN 13755 .
prEN 13919 Natural stone test methods – Determination of resistance to ageing by SO action in the
2
presence of humidity.
prEN 14066 Natural stone test methods – Determination of thermal shock resistance.
prEN 14147 Natural stone test methods – Determination of resistance to ageing by salt mist.
prEN 14157 Natural stone test methods – Determination of abrasion resistance.
prEN 14158 Natural stone test methods – Determination of rupture energy.
prEN …(WI 00246011) Natural stone test methods – Determination of thermal dilatation coefficient.
prEN …(WI 00246012) Natural stone test methods – Determination of sound – speed propagation.
Natural stone test methods – Determination of Knoop hardness.
prEN …(WI 00246015)
prEN …(WI 00246017) Natural stone test methods – Determination of slip coefficient.
Natural stone test methods – Determination of static elastic modulus
prEN …(WI 00246018) .
prEN …(WI 00246030) Natural stone test methods – Determination of surface finishes (rugosity).
It is intended that other European Standards should call up this European Standard as the basis of
evaluation of conformity.
NOTE Nevertheless it is not intended that all natural stones products should be subjected regularly to
all the listed tests. Specifications in other standards should call up only relevant test methods.
The Annex A contained in this European Standard is normative.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Czech
Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,
Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.
3

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EN 13161:2001 (E)
1 Scope
This European Standard specifies a method to determine the flexural strength of natural stones under
constant moment. The standard contains provision for both an identification test and for a
technological test.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text, and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
of these publications apply to this European Standard only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies (including
amendments).
EN 12390-4 Testing hardened concrete - Part 4: Compressive strength - Specification for
testing machines.
EN 12390-5 Testing hardened concrete - Part 5: Flexural strength of test specimens.
3 Principle
After appropriate preparation a specimen of the rock to be tested is laid and centred between two
supports. Thereafter the specimen is subjected to two line loads acting on the top of the specimen and
so that each load is located at a distance of one third of the length of span. The loads are steadily
increased until failure.
4 Symbols
R
flexural strength at constant moment, in Megapascal
tc
F
load at failure in newton
B
specimen width in millimetres
h
specimen thickness in millimetres
L
specimen length in millimetres

distance between the supporting rollers, in millimetres
4

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EN 13161:2001 (E)
5 Apparatus
5.1 A balance capable of weighing the specimen with a reading up to 0,01% of the mass to be
weighed.
5.2 A ventilated oven capable of maintaining a temperature of (70±5)°C.
5.3 A linear measuring device with a reading up to 0,05 mm.
5.4 A test machine of appropriate force, in accordance with EN 12390-4 and calibrated according
to this standard.
5.5 A device for applying loads on the specimen by a two-points load, in accordance with
EN 12390-5. It consists of two upper rollers (loa
...