1、BRITISH STANDARD BS EN 13892-2:2002 Methods of test for screed materials Part 2: Determination of flexural and compressive strength The European Standard EN 13892-2:2002 has the status of a British Standard ICS 91.100.10 BS EN 13892-2:2002 This British Standard, having been prepared under the direct
2、ion of the Building and Civil Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 28 November 2002 BSI 28 November 2002 ISBN 0 580 40864 7 National foreword This British Standard is the official English language versio
3、n of EN 13892-2:2002. The UK participation in its preparation was entrusted by Technical Committee B/544, Plastering, rendering, dry lining, screeds and in situ floorings, to Subcommittee B/544/6, Screeds and in situ floorings, which has the responsibility to: A list of organizations represented on
4、this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by
5、 using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immuni
6、ty from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them i
7、n the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 7 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN
8、STANDARD NORMEEUROPENNE EUROPISCHENORM EN138922 November2002 ICS91.100.10 Englishversion MethodsoftestforscreedmaterialsPart2:Determinationof flexuralandcompressivestrength MthodesdessaidesmatriauxpourchapesPartie2: Dterminationdelarsistancelaflexionetla compression PrfverfahrenfrEstrichmrtelundEstr
9、ichmassenTeil2: BestimmungderBiegezugundDruckfestigkeit ThisEuropeanStandardwasapprovedbyCENon9October2002. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbiblio
10、graphicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedto
11、theManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORS
12、TANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN138922:2002EEN138922:2002(E) 2 Contents page Foreword3 1 Scope 4 2 Normativeref
13、erences 4 3 Principle4 4 Symbolsandabbreviations . .4 5 Apparatus .5 5.1 Testingmachine. 5 5.2 Apparatusspecifictoeachtest. .5 5.2.1 Flexuraltest. .5 5.2.2 Compressiontest .5 6 Procedure .5 6.1 Flexuraltest. .5 6.2 Compressiontest .6 7 Testreport . .6EN138922:2002(E) 3 Foreword Thisdocument(EN138922
14、:2002)hasbeenpreparedbyTechnicalCommitteeCEN/TC303,“Floorscreedsand insituflooringsinbuildings“,thesecretariatofwhichisheldbyDIN. ItwaspreparedbyWorkingGroup2”ScreedmaterialsandfloorscreedsTestmethods“takingintoaccountthe proposalssubmittedbyWorkingGroup1”ScreedmaterialsandfloorscreedsDefinitions,pr
15、opertiesand requirements“. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbyMay2003,andconflictingnationalstandardsshallbewithdrawnatthelatestby May2003. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorg
16、anizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain, Sweden,SwitzerlandandtheUnitedKingdom.EN138922:2002(E) 4 1Scope ThisEuropeanStandar
17、dspecifiesamethodfordeterminingtheflexuralandcompressivestrengthofmoulded specimensmadefromcementitiousscreed,calciumsulphatescreed,magnesitescreedandsyntheticresin screedmaterial. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications.These n
18、ormativereferencesarecitedattheappropriateplacesinthetextandthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationre
19、ferredtoapplies(includingamendments). EN1961, MethodsoftestingcementPart1:Determinationofstrength. EN13813, ScreedmaterialandfloorscreedsScreedmaterialPropertiesandrequirements. EN138921,MethodsoftestforscreedmaterialsPart1:Sampling,makingandcuringspecimensfortest. ENISO65071, MetallicmaterialsVicke
20、rshardnesstestPart1:Testmethod(ISO65071:1997). 3Principle TheflexuralandcompressivestrengthsaremeasuredonspecimensmadeinaccordancewithEN138921.The flexuraltestiscarriedoutfirst.Theflexuralstrengthisdeterminedfromtheloadrequiredtocausefailureofthetest specimenundermidspanbending. Thetwohalvesofthebro
21、kentestspecimenarethenusedinthecompressiontest.Eachistestedusingauniformly distributedcompressiveloadappliedoveraportionofthebrokenprism.Thecompressivestrengthisdetermined fromtheloadrequiredtocausefailure. 4 Symbolsandabbreviations F f istheloadinNewtons(N)requiredtocausefailureintheflexuraltest. F
22、 C istheloadinNewtons(N)requiredtocausefailureinthecompressiontest. l isthedistanceinmillimeters(mm)betweentheaxesofthesupportrollersintheflexuraltest. b isthewidthofthetestspecimeninmillimeters(mm)underthecentralrollerintheflexuraltestinthe“astested” mode; bisthedepthinthe“ascast”mode. d isthedepth
23、ofthetestspecimeninmillimeters(mm)underthecentralrollerintheflexuraltestinthe“astested” mode; disthewidthinthe“ascast”mode. A istheareaofthecompressivestrengthspecimenincontactwiththebearingplates(nominally1600mm 2 ) R f istheflexuralstrengthinN/mm 2 asdeterminedfromthetestparameters.EN138922:2002(E
24、) 5 R C isthecompressionstrengthinN/mm 2 asdeterminedforthetestparameters. 5Apparatus 5.1 Testingmachine ThetestingmachinedescribedinEN1961meetstherequirementssetoutbelow. Thetestingmachineshallbeofsuitablecapacityandsensitivitysuchthatthespecimencanbeexpectedtofracture inthatpartoftherangewhichisce
25、rtifiedtobeaccurateto2%oftheindicatedload,thatisnormallyintheupper fourfifthsoftherange. 5.2 Apparatusspecifictoeachtest 5.2.1 Flexuraltest Atestbedconsistingoftwosteelsupportingrollersoflengthsbetween44mmand50mmand(100,5)mm diameter,spaced(100,00,5)mmapart,andathirdsteelrollerofthesamelengthanddiam
26、eterlocatedcentrally betweenthesupportrollers.Thethreeverticalplanesthroughtheaxesofthethreerollersshallbeparalleland remainparallel,equidistantandnormaltothedirectionoftheprismundertest.Oneofthesupportingandthe loadingrollershallbecapableoftiltingslightlytoallowauniformdistributionoftheloadoverthew
27、idthoftheprism withoutsubjectingittoanytorsionalstresses. 5.2.2 Compressiontest a)Theuppermachineplatenshallbeabletoalignfreelyascontactismadewiththespecimen,buttheplatens shallberestrainedfromtiltingwithrespecttooneanotherduringloading. b)Twobearingplatesmadeoftungstencarbideorofsteelofsurfacehardn
28、essatleast600HV(VICKERS hardnessvalue,seeENISO65071).Theplatesshallbe40,0mmlong,(40,00,1)mmwideand10mmthick. Thedimensionaltoleranceforthewidthshallbebasedontheaverageoffoursymmetricallyplacedmeasurements. Theflatnesstoleranceforthecontactfacesshallbe0,01mm. c)Jigtoensurecorrectlocationofthespecimen
29、andbearingplatesinrelationtotheplatensonthetestmachine. 6Procedure 6.1Flexural test Threespecimens40mmx40mmx160mmpreparedasspecifiedinEN138921shallbetested. Testeachspecimen28daysaftercastingandimmediatelyonbeingremovedfromthestorageatmosphere. Wherethemanufacturecandemonstratethattherequiredclasses
30、ofpropertiescanbeachievedatanearlierage, thisagemaybeincludedinthedesignationprovidedalldeclaredclassvaluesareachievedatthisage. Thesidesofeachspecimenshallbewipedwithacleanclothtoremoveanyloosematerial.Thespecimenshallbe weighed,thewidthanddepthofthespecimenshallbemeasuredmidwayalongitslengthandthe
31、detensityshall becalculated. NOTE:Thedepthisthedimensionbetweenthetwocastsides. Thebearingoftherollersshallbewipedtoremoveanygritorothermaterial,andthespecimenshallbeplacedwith onesideascastcentrallyinbothdirectionsonthesupportingrollers.EN138922:2002(E) 6 Theloadshallbeappliedwithoutshockatauniform
32、rateof(5010)N/secuntilfailure. Themaximumloadapplied, F f inN(Newtons),shallberecorded.Thetwohalfspecimensshallbereturnedtothe storagechamberandshallbekeptthereifrequired,forcompressivestrengthmeasurements. Theflexuralstrength, R f inN/mm 2 ,shallbecalculated,usingthefollowingequation: R f = 2 2 / 5
33、 , 1 mm N bd l F f Theflexuralstrengthshallberecordedtothenearest0,05N/mm 2 forindividualspecimensandtothenearest0,1 N/mm 2 forthemeanofthethreetests. 6.2Compression test Thesixspecimensresultingfromtheflexuraltestshallbetestedonthesamedayastheflexuraltest. Anyloosegritorothermaterialshallberemovedf
34、romthesidesofthespecimenascast.Thebearingsurfaceof thetestingmachineandthebearingplatesshallbewipedwithacleanclothandthespecimenshallbeplacedin themachineusingthejiginsuchamannerthattheloadisappliedtothesideandnottothetopascast. Theprismshallbearrangedsothatthecastendprotrudes16mmbeyondtheneareredge
35、ofthebearingplates. Anyspecimensshallbediscardedthatdonotprovideacubeofsolidmaterialbetweenthetopandbottombearing plates.Thespecimenshallbecarefullyalignedsothattheloadwillbeappliedtothewholewidthofthefacesin contactwiththeplates.Usingthelocationjig,theassemblyshallbecentredcarefullyonthelowerplaten
36、ofthetest machine. Theloadshallbeappliedwithoutshockandincreasedcontinuouslyatarateof(2400200)N/secuntilfailure. Themaximumloadapplied, F C inN(Newtons),shallberecordedduringthetest. Thecompressivestrengthshallbecalculatedasthemaximumloadcarriedbythespecimendividedbythecross sectionalareaofthespecim
37、enincontactwiththebearingplate. R C = A F c whereA=40mmx40mm. Thecompressivestrengthshallberecordedtothenearest0,05N/mm 2 forindividualresultsandtothenearest 0,1N/mm 2 themeanstrengthofsixspecimens. 7 Testreport Thetestreportshallincludethefollowinginformation: a) number,titleanddateofissueofthisEur
38、opeanStandard; b) nameandaddressofthelaboratorycarryingoutthetestsandnameandaddressofthelaboratorypreparingthe samples(ifdifferent): c) identificationnumberofthetestreport; d) nameandaddressofthemanufacturerorsupplieroftheproduct;EN138922:2002(E) 7 e) nameandidentificationmarksorbatchnumberoftheprod
39、uct; f) dateofsupplyoftheproduct; g) methodofsampling(byreferencetoEN138921)andbywhichorganisation; h) place,dateandtimeofsampling; i) identificationofthescreedsamples,includingtype,originanddesignationofthescreedmaterialbyreferenceto therelevantproductstandardEN13813; j) preparation(mixing,casting)
40、andstorage(curing)conditionsbyreferencetoEN138921; k) dateandtimeofpreparingsamplesfortest(i.e.dateandtimeofanymixing,casting,mouldingordemoulding procedure,ifappropriate); l) ageofscreedmaterialwhentested; m) densityofeachindividualtestsample; n) testmethodused(referencemanualoralternativemethod,if
41、appropriate),anddetailsoftestspecimens includingnumber,dimensions,mass,etc.ifappropriate; o) dateoftestandtheidentificationnumberoftheapparatusordetailsofthetestequipmentused,includingthe make,typeandcapacityandthecalibrationsdetails; p) testresults(individualvaluestothenearest0,05N/mm 2 ,andcorresp
42、ondingmeanvaluestatedtothenearest 0,1N/mm 2 ); q) remarks; r) dateoftestreportandsignature.BS EN 13892-2:2002 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standa
43、rds in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the ident
