SIST EN 14205:2004
(Main)Natural stone test methods - Determination of Knoop hardness
Natural stone test methods - Determination of Knoop hardness
This European Standard specifies a method of determining the hardness of natural stone using the Knoop indenter.
Prüfverfahren für Naturstein - Bestimmung der Härte nach Knoop
Diese Europäische Norm legt ein Verfahren zur Bestimmung der Härte von Naturstein durch Anwendung des Knoop-Eindringkörpers fest.
Méthode d'essai pour pierres naturelles - Détermination de la dureté Knoop
La présente Norme européenne définit une méthode de détermination de la dureté de la pierre naturelle au moyen du systeme Knoop.
Preskušanje naravnega kamna – Določitev trdote po Knoopu
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Prüfverfahren für Naturstein - Bestimmung der Härte nach KnoopMéthode d'essai pour pierres naturelles - Détermination de la dureté KnoopNatural stone test methods - Determination of Knoop hardness91.100.15Mineralni materiali in izdelkiMineral materials and products73.020Rudarstvo in kamnolomsko izkopavanjeMining and quarryingICS:Ta slovenski standard je istoveten z:EN 14205:2003SIST EN 14205:2004en01-julij-2004SIST EN 14205:2004SLOVENSKI
STANDARD
SIST EN 14205:2004
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14205November 2003ICS 73.020; 91.100.15English versionNatural stone test methods - Determination of Knoop hardnessMéthodes d'essai pour les pierres naturelles -Détermination de la dureté KnoopPrüfverfahren für Naturstein - Bestimmung der Härte nachKnoopThis European Standard was approved by CEN on 1 September 2003.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2003 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14205:2003 ESIST EN 14205:2004
EN 14205:2003 (E)2Contents
pageForeword.31Scope.42Principle.43Symbols.44Apparatus.45Preparation of the specimens.45.1Sampling.45.2Number of specimens.46Test procedure.57Expression of results.68Test report.6SIST EN 14205:2004
EN 14205:2003 (E)3ForewordThis document (EN 14205:2003) has been prepared by Technical Committee CEN/TC 246, "Natural stones", thesecretariat 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 orby endorsement, at the latest by May 2004, and conflicting national standards shall be withdrawn at the latest byMay 2004.This standard is one of the series of 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 capillarityEN 1926, Natural stone test methods – Determination of compressive strengthEN 1936, Natural stone test methods – Determination of real density and apparent density and of total and openporosityEN 12370, Natural stone test methods – Determination of resistance to salt crystallisationEN 12371, Natural stone test methods - Determination of frost resistanceEN 12372, Natural stone test methods – Determination of flexural strength under concentrated loadEN 12407, Natural stone test methods – Petrographic examinationEN 13161, Natural stone test methods – Determination of flexural strength under constant momentEN 13755, Natural stone test methods – Determination of water absorption at atmospheric pressureEN 13373, Natural stone test methods – Determination of geometric characteristics on unitsEN 13919, Natural stone test methods – Determination of resistance to ageing by SO2 action in the presence ofhumidityEN 14066, Natural stone test methods – Determination of resistance to ageing by thermal shockprEN 14147, Natural stone test methods – Determination of resistance to ageing by salt mistprEN 14157, Natural stone test methods – Determination of the abrasion resistanceprEN 14158, Natural stone test methods – Determination of rupture energyprEN 14231, Natural stone test methods – Determination of the slip resistance by means of the pendulum testerprEN 14581, Natural stone test methods – Determination of thermal expansion coefficientprEN 14579, Natural stone test methods – Determination of sound speed propagationprEN 14580, Natural stone test methods – Determination of the static elastic modulusNo existing European Standard is superseded.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,Slovakia, Spain, Sweden, Switzerland and the United Kingdom.SIST EN 14205:2004
EN 14205:2003 (E)41 Scope This European Standard specifies a method of determining the hardness of minerals in natural stone using theKnoop indenter. This method is especially useful for carbonate rock.2 Principle After carrying out a series of indentations by means of a Knoop indenter, the corresponding values of Knoopmicrohardness are calculated and the microhardness distribution is given.3 Symbols P - load on the indenter, in newtons L - length of the largest diagonal of the indentation, in millimetres HK - Knoop microhardness, in Megapascals HK25 - Knoop microhardness corresponding to a cumulative frequency of 25% (“lower quartile”), inMegapascalsHK50 - Knoop microhardness corresponding to a cumulative frequency of 50% (“median value”) HK75 - Knoop microhardness corresponding the cumulative frequency of 75% (“upper quartile”)4 ApparatusA microdurimeter essentially made of the following parts:- sample holder with a mechanism for horizontal movement in two orthogonal directions by means of adjustablescrews which also measure the amount of movement;- Knoop indenter (see Figure 1);- set of interchangeable weights from (0,1 to 5,0) Newtons;- device for applying the load on the indenter at different speeds;- microscope with a micrometer for measuring the indentation width and length with an accuracy o
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.