SIST EN 14580:2005

Natural stone test methods - Determination of static elastic modulus

The document specifies a method to determine the static elastic modulus of natural stone in uniaxial compression.

Prüfverfahren für Naturstein - Bestimmung des statischen Elastizitätsmoduls

Dieses Dokument legt ein Verfahren zur Bestimmung des statischen Elastizitätsmoduls von Naturstein unter
uniaxialem Druck fest.

Méthodes d'essai pour pierres naturelles - Détermination du module d'élasticité statique

Le présent document décrit une méthode pour déterminer le module d�élasticité statique de la pierre naturelle
dans des conditions de compression uniaxiale.

Preskušanje naravnega kamna – Ugotavljanje statičnega elastičnega modula

General Information

• Status: Published
• Publication Date: 30-Sep-2005
• ICS: 73.020 - Mining and quarrying
• ICS: 91.100.15 - Mineral materials and products
• Technical Committee: KAM - Natural stone
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Oct-2005
• Due Date: 01-Oct-2005
• Completion Date: 01-Oct-2005
• Ref Project: EN 14580:2005 - Natural stone test methods - Determination of static elastic modulus

Overview

EN 14580:2005 is a CEN European standard that defines a laboratory test method to determine the static elastic modulus of natural stone under uniaxial compression. The method measures longitudinal deformation at two stress levels within cyclical loading to calculate the modulus (stiffness) of stone specimens. EN 14580 is intended for consistent mechanical characterization of natural stone used in construction, conservation and material selection.

Key topics and technical requirements

• Scope: Static elastic modulus in compression determined by uniaxial loading cycles. Requires prior knowledge of compressive strength (EN 1926).
• Apparatus: calibrated compression testing machine (per EN 12390-4); high‑precision length or strain measuring devices (inductance gauges or strain gauges) with a minimum gauge length related to grain size; ventilated oven capable of (70 ± 5) °C.
• Specimen geometry and preparation:
  • Cylindrical or prismatic specimens with minimum cross dimension of 50 mm.
  • Height-to-diameter (or height-to-smaller-plan-dimension) ratio between 2 and 4.
  • Gauge length at least ten times the largest grain diameter, minimum 50 mm.
  • Faces for load application must be plane and perpendicular within tight tolerances; capping with specified mortar (CEM I 52,5 R per EN 197‑1) is allowed if needed.
  • Orientation rules for anisotropic stones (bedding/foliation) - axis normally perpendicular to principal planes of anisotropy unless otherwise required.
• Conditioning: Identification tests require drying to constant mass at (70 ± 5) °C; technological tests allow application‑specific conditioning (must be reported).
• Loading and measurement: Cyclic loading between a basic stress (2% of mean compressive strength) and an upper stress (33% of mean compressive strength) at a specified stress rate (0.5 ± 0.2 MPa/s). Deformations are recorded prior to and during the third loading cycle (points A and B).
• Calculation: The static elastic modulus is the ratio of the change in stress to the corresponding change in strain between the two measured stress levels. Results are reported in MPa with at least three significant figures.
• Reporting: Detailed test report requirements (sample identification, specimen dimensions, conditioning, compressive strengths, stresses and strains, per‑specimen and mean elastic modulus, deviations from the standard).

Applications and users

• Structural and geotechnical engineers assessing stone stiffness for load-bearing designs.
• Testing laboratories and quality control facilities providing material data for specifications and compliance.
• Quarry operators and stone suppliers for product characterization and classification.
• Architects, conservators and restoration specialists evaluating existing masonry and selecting compatible replacement stone.
• Research institutions studying mechanical behavior of natural stone.

Related standards

• EN 1926 - Determination of compressive strength (referenced prerequisite)
• EN 12390‑4 - Testing machines (calibration/specification)
• Other CEN natural stone test methods (EN 13755, EN 14205, EN 14579, etc.) for complementary characterization.

Keywords: EN 14580:2005, static elastic modulus, natural stone test methods, uniaxial compression, compressive strength, strain gauges, specimen preparation, CEN standard.

Standards Content (Sample)

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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 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 s
...

SLOVENSKI STANDARD
01-oktober-2005
3UHVNXãDQMHQDUDYQHJDNDPQD±8JRWDYOMDQMHVWDWLþQHJDHODVWLþQHJDPRGXOD
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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 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 standa
...