EN 14580:2005

SLOVENSKI STANDARD
01-oktober-2005
Preskušanje naravnega kamna – Ugotavljanje statičnega elastičnega modula
Natural stone test methods - Determination of static elastic modulus
Prüfverfahren für Naturstein - Bestimmung des statischen Elastizitätsmoduls
Méthodes d'essai pour pierres naturelles - Détermination du module d'élasticité statique
Ta slovenski standard je istoveten z: EN 14580:2005
ICS:
73.020 Rudarstvo in kamnolomsko Mining and quarrying
izkopavanje
91.100.15 Mineralni materiali in izdelki Mineral materials and
products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 14580
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2005
ICS 73.020; 91.100.15
English version
Natural stone test methods - Determination of static elastic
modulus
Méthodes d'essai pour pierres naturelles - Détermination Prüfverfahren für Naturstein - Bestimmung des statischen
du module d'élasticité statique Elastizitätsmoduls
This European Standard was approved by CEN on 3 March 2005.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14580:2005: E
worldwide for CEN national Members.

Contents
Page
Foreword .3
1 Scope .5
2 Normative references .5
3 Principle.5
4 Symbols and definitions.5
5 Apparatus .5
6 Preparation of the specimens .6
6.1 Sampling.6
6.2 General .6
6.3 Test specimens .6
6.3.1 Dimensions of test specimens.6
6.3.2 Dimensions of the gauges.6
6.3.3 Surface finish .6
6.3.4 Planes of anisotropy.7
6.3.5 Conditioning of specimens before testing.7
6.3.6 Attaching the gauges on the specimens.7
7 Test procedure .7
7.1 General .7
7.2 Measuring the specimen .7
7.3 Placing the specimen in the testing machine.7
7.4 Loading.7
8 Expression of results.8
9 Test report .8
Annex A (normative) Statistical evaluation of test results .10
A.1 Scope .10
A.2 Symbols and definitions.10
A.3 Statistical evaluation of test results .11
Bibliography.14

Foreword
This document (EN 14580:2005) has been prepared by Technical Committee CEN/TC 246 “Natural stones”, 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 October 2005, and conflicting national standards shall be withdrawn at the latest
by October 2005.
This document is one of the series of draft standards for tests on natural stone.
Test methods for natural stone consist of the following parts:
EN 1925, Natural stone test methods – Determination of water absorption coefficient by capillarity
EN 1926, Natural stone test methods – Determination of compressive strength
EN 1936, Natural stone test methods – Determination of real density and apparent density, and of total and open
porosity
EN 12370, Natural stone test methods – Determination of resistance to salt crystallisation
EN 12372, Natural stone test methods – Determination of flexural strength under concentrated load
EN 12407, Natural stone test methods – Petrographic examination
EN 13161, Natural stone test methods – Determination of flexural strength under constant moment
EN 13364, Natural stone test methods – Determination of the breaking load at dowel hole
EN 13373, Natural stone test methods - Determination of geometric characteristics on units
EN 13755, Natural stone test methods – Determination of water absorption at atmospheric pressure
EN 13919, Natural stone test methods – Determination of resistance to ageing by SO action in the presence of
humidity
EN 14066, Natural stone test methods – Determination of resistance to ageing by thermal shock
EN 14147, Natural stone test methods – Determination of resistance to ageing by salt mist
EN 14157, Natural stone test methods – Determination of the abrasion resistance
EN 14158, Natural stone test methods – Determination of rupture energy
EN 14205, Natural stone test methods – Determination of Knoop hardness
EN 14231, Natural stone test methods – Determination of the slip resistance by means of the pendulum tester
EN 14579, Natural stone test methods – Determination of sound speed propagation
prEN 14580, Natural stone test methods – Determination of static elastic modulus
EN 14581, Natural stone test methods – Determination of linear thermal expansion coefficient
No existing document is superseded.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard : Austria, Belgium, Cyprus, Czech Republic, Denmark,
Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
1 Scope
The document specifies a method to determine the static elastic modulus of natural stone in uniaxial compression.
2 Normative references
The following referenced documents are indispensable for the application 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 1926, Natural stone test methods – Determination of compressive strength
EN 12390-4, Testing hardened concrete – Part 4: Compressive strength – Specification for testing machines
3 Principle
The longitudinal deformations of a specimen under basic and upper uniaxial compressive stresses are measured.
From these values the static elastic modulus is calculated.
4 Symbols and definitions
E static elastic modulus in Megapascals (MPa);
b
σ basic stress, of approximately 2 % of the mean value of the tested compressive strength, prior to the third
u
loading cycle, in MPa;
σ upper stress, of approximately 33 % of the mean value of the tested compressive strength, during the third
o
loading cycle in MPa;
ε mean unitary deformation under the basic stress at point A (see Figure 2);
u
ε mean unitary deformation under the upper stress at point B (see Figure 2).
o
5 Apparatus
5.1 A compression testing machine of appropriate force in accordance with EN 12390-4 and calibrated according
to that standard.
5.2 Length measuring devices (for example inductance gauges) or strain measuring devices (for example strain
gauges) with a gauge length of at least ten grain diameters with a minimum of 50 mm. The apparatus shall be
-6
capable of measuring changes in strain of 5 m/m × 10 m/m or less.
5.3 A ventilated oven which can maintain a temperature of (70 ± 5) °C.
6 Preparation of the specimens
6.1 Sampling
The sampling is not the responsibility of the test laboratory except where especially requested. At least six
specimens shall be selected from an homogeneous batch.
6.2 General
The test may be carried out as an identification test or as a technological test.
In identification tests the conditioning of the specimens before testing is performed according to 6.3.5.1. For the
conditioning before testing in technological tests see 6.3.5.2.
6.3 Test specimens
6.3.1 Dimensions of test specimens
The specimens shall be cylinders with a diameter (d) or prisms with a plan dimension (a) of 50 mm min. The
diameter or the plan dimension of the specimen shall be related to the size of the largest cristal grain in the stone
with a ratio of 10:1. The ratio height to diameter or height to smaller plan dimension shall be between 2 and 4.
6.3.2 Dimensions of the gauges
The minimum gauge length shall be the diameter or the larger plan dimension (b) of the specimen (Figure 1).

Figure 1 — Arrangement of the length (or strain) measuring devices
6.3.3 Surface finish
6.3.3.1 General
The faces through which the load is to be applied shall be plane to a tolerance of 0,1 mm and shall not depart from
perpendicularity to the axis of the specimen by more than 0,01 radian or 1 mm in 100 mm. The sides of the
specimen shall be smooth and free of abrupt irregularities and straight to within 0,3 mm over the full length of the
specimen.
To meet the above mentioned requirements, the specimen shall be finished on either lathe or surface grinder, with
a final touching on a lapping machine if needed.
Capping with mortar according to the procedure indicated in 6.3.3.2 is admitted only if the indicated tolerances are
not obtainable with the prescribed mechanical preparation. This condition shall be clearly indicated in the test report.
6.3.3.2 Capping with mortar
It is possible to cap the specimen by using a mortar made up with cement CEM I 52,5 R according to EN 197-1 and
waiting as much as needed for hardening.
6.3.4 Planes of anisotropy
If the stone shows planes of anisotropy (e.g. bedding, foliation), the axis of the specimens shall be perpendicular to
the principal planes of anisotropy.
If a test with loading perpendicular to any other orientation is required, another set of specimens with the same
dimensional characteristics shall be prepared.
6.3.5 Conditioning of specimens before testing
6.3.5.1 Identification test
The specimens shall be dried at (70 ± 5) °C to a constant mass.
Constant mass is reached when the difference between two weighings carried out at an interval of (24 ± 2) h is not
greater than 0,1 % of the first of the two masses.
6.3.5.2 Technological test
The conditioning of the sp
...