SIST EN 12371:2010
(Main)Natural stone test methods - Determination of frost resistance
Natural stone test methods - Determination of frost resistance
This European Standard specifies a method to assess the effect of freeze/thaw cycles on natural stones (see EN 12670 for terminology, and EN 12440 for denomination). The standard contains provision for both a shorter technological test (Test A) to assess the effect of freeze/thaw cycles on the relevant performance characteristics and an identification test (Test B).
Prüfverfahren für Naturstein - Bestimmung des Frostwiderstandes
Diese Europäische Norm legt ein Verfahren zur Bestimmung der Wirkung von Frost-Tau-Wechsel auf Natursteine
fest – wobei EN 12670 für die Terminologie und EN 12440 für die Bezeichnung heranzuziehen sind.
Die Norm enthält Verfahren sowohl für eine kürzere technologische Prüfung (Prüfung A) zur Bestimmung der
Wirkung von Frost-Tau-Wechseln auf die relevanten Leistungsdaten als auch für eine Identifizierungsprüfung
(Prüfung B).
ANMERKUNG Einige Marmore, wie in EN 12440 festgelegt, unterliegen Änderungen in den physikalischen
Eigenschaften eher aufgrund der Prüfungsbedingungen als aufgrund der Frost-Tau-Wechsel. In diesen Fällen sollten
zusätzliche Prüfungen (z. B. EN 14066) durchgeführt werden.
Méthodes d'essai des pierres naturelles - Détermination de la résistance au gel
La présente Norme européenne spécifie une méthode d’évaluation de l’effet des cycles de gel/dégel sur les pierres naturelles (voir l’EN 12670 pour la terminologie et l’EN 12440 pour la dénomination). La présente Norme contient des dispositions concernant à la fois un essai technologique plus court (Essai A) permettant d’évaluer l’effet des cycles de gel/dégel sur les caractéristiques de performances appropriées et un essai d’identification (Essai B).
NOTE Certains marbres, tels que définis dans l’EN 12440, subissent des changements de leurs propriétés physiques résultant davantage d’autres conditions climatiques que seulement des cycles de gel/dégel. Dans ce cas, il convient d’effectuer des essais supplémentaires (par exemple, l’EN 14066).
Preskušanje naravnega kamna - Ugotavljanje odpornosti proti zmrzovanju
Ta evropski standard opredeljuje metodo za ocenjevanje učinkov ciklusov zmrzovanja in odtaljevanja na naravni kamen (glej EN 12670 za terminologijo, in EN 12440 za denominacijo). Standard vsebuje določbe tako za krajši tehnološki preskus (Preskus A) za ocenjevanje učinka ciklusov zmrzovanja in odtaljevanja na pomembne lastnosti delovanja ter identifikacijski preskus (Preskus B).
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Preskušanje naravnega kamna - Ugotavljanje odpornosti proti zmrzovanjuPrüfverfahren für Naturstein - Bestimmung des FrostwiderstandesMéthodes d'essai des pierres naturelles - Détermination de la résistance au gelNatural stone test methods - Determination of frost resistance91.100.15Mineralni materiali in izdelkiMineral materials and productsICS:Ta slovenski standard je istoveten z:EN 12371:2010SIST EN 12371:2010en,fr,de01-september-2010SIST EN 12371:2010SLOVENSKI
STANDARDSIST EN 12371:20021DGRPHãþD
SIST EN 12371:2010
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12371
March 2010 ICS 73.020; 91.100.15 Supersedes EN 12371:2001English Version
Natural stone test methods - Determination of frost resistance
Méthodes d'essai pour pierres naturelles - Détermination de la résistance au gel
Prüfverfahren für Naturstein - Bestimmung des Frostwiderstandes This European Standard was approved by CEN on 20 February 2010.
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 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 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12371:2010: ESIST EN 12371:2010
EN 12371:2010 (E) 2 Contents Page Foreword .31 Scope .52 Normative references .53 Principle .54 Symbols .55 Apparatus .66 Preparation of the specimens .66.1 Sampling .66.2 Size of specimens .76.2.1 Technological test (Test A) .76.2.2 Identification test (Test B) .76.2.3 Putting reference marks on the specimens .76.3 Monitoring core temperature .76.4 Drying the specimens .86.5 Immersion of the specimens .86.6 Determination of the apparent volume .86.7 Number of cycles .86.7.1 Technological test (Test A) .86.7.2 Identification test (Test B) .87 Test procedure .87.1 Arrangement of the specimens in the freezing tank .87.2 Description of the freezing and thawing cycles .97.3 Control measurements to determine the freeze/thaw resistance .97.3.1 Technological test (Test A) .97.3.2 Identification test (Test B) . 108 Expression of the results . 118.1 Technological test (Test A) . 118.2 Identification test (Test B) . 119 Test report . 12Annex A (informative)
Test cycles . 13Bibliography . 15 SIST EN 12371:2010
EN 12371:2010 (E) 3 Foreword This document (EN 12371:2010) 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 September 2010, and conflicting national standards shall be withdrawn at the latest by September 2010. This document supersedes EN 12371:2001. This European Standard is one of the series of standards for tests on natural stone. Test methods for natural stone consist of the following European Standards: EN 1925
Natural stone test methods – Determination of water absorption coefficient by capillarity EN 1926
Natural stone test methods – Determination of uniaxial 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 14066
Natural stone test methods – Determination of resistance to ageing by thermal shock EN 14146 Natural stone test methods – Determination of the dynamic modulus of elasticity (by measuring the fundamental resonance frequency) 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
EN 14580 Natural stone test methods – Determination of static elastic modulus
EN 14581
Natural stone test methods – Determination of linear thermal expansion coefficient It is intended that other ENs should call up this European Standard as the basis of evaluation of conformity.
SIST EN 12371:2010
EN 12371:2010 (E) 4 NOTE 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. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. SIST EN 12371:2010
EN 12371:2010 (E) 5 1 Scope This European Standard specifies a method to assess the effect of freeze/thaw cycles on natural stones (see EN 12670 for terminology, and EN 12440 for denomination). The standard contains provision for both a shorter technological test (Test A) to assess the effect of freeze/thaw cycles on the relevant performance characteristics and an identification test (Test B). NOTE Some marbles, as defined in EN 12440, undergo changes in physical properties as a result of the test conditions rather than the freeze/thaw cycles. In these cases, additional tests (for example EN 14066) should be applied. 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 uniaxial compressive strength EN 12372, Natural stone test methods — Determination of flexural strength under concentrated load 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 14066, Natural stone test methods — Determination of resistance to ageing by thermal shock EN 14146, Natural stone test methods — Determination of the dynamic modulus of elasticity (by measuring the fundamental resonance frequency 3 Principle The frost resistance of natural stone units is determined by a test comprising cycles of freezing in air and thawing in water. 4 Symbols Md0 mass of the dry specimen before immersion in water and before starting the cycles, in grams Ms0 mass of the saturated specimen after immersion in water and before starting the cycles, in grams Mh0 apparent mass of the specimen in water before starting the cycles, in grams Mdn mass of the dry specimen at Nc cycles, in grams Msn mass of the saturated specimen at Nc cycles, in grams Mhn apparent mass of the specimen in water at n cycles, in grams Vb0 apparent volume of the specimen before freezing, in millilitres Vbn apparent volume of the specimen at Nc cycles, in millilitres SIST EN 12371:2010
EN 12371:2010 (E) 6 ∆Vb change in apparent volume of the specimen, as a percentage E0 dynamic elastic modulus of the dry specimen before freezing, in Megapascals En dynamic elastic modulus of the dry specimen at n cycles, in Megapascals ∆E change in dynamic elastic modulus, as a percentage Nc number of cycles completed before failure for identification test 5 Apparatus 5.1 A freezing tank of sufficient capacity to hold the required number of specimens, possibly with an automatic control system to programme the freezing and thawing cycles within the chamber with a tolerance of ± 2,0 °C. NOTE The tests can be executed manually if no suitable automated system is available. 5.2 A temperature recording system capable of measuring temperature to + 0,1 °C. 5.3 A device for measuring dynamic elastic modulus in accordance with EN 14146. 5.4 A weighing instrument with an accuracy of at least 0,01 % of the mass to be weighed. 5.5 A ventilated oven capable of maintaining 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 specially requested. For technological tests the number of specimens shall be in accordance with the appropriate standard (see also Table 1). Two sets of specimens are required, one to be tested after being subjected to the freeze/thaw cycles, the other to be tested without freeze/thaw cycling.
Each set shall be randomly selected from the body of stone to be tested. In addition, one extra
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