1、BRITISH STANDARD BS EN 13892-4:2002 Methods of test for screed materials Part 4: Determination of wear resistance-BCA The European Standard EN 13892-4:2002 has the status of a British Standard ICS 91.100.10 BS EN 13892-4:2002 This British Standard, having been prepared under the direction of the Bui
2、lding 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 40876 0 National foreword This British Standard is the official English language version of EN 13892-
3、4:2002. 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 this subcommit
4、tee 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 using the “Se
5、arch” 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 immunity from legal
6、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 in the UK. Summ
7、ary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 9 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 CommentsEUROPEANSTANDARD NORME
8、EUROPENNE EUROPISCHENORM EN138924 November2002 ICS91.100.10 Englishversion MethodsoftestforscreedmaterialsPart4:Determinationof wearresistanceBCA MthodesdessaisdesmatriauxpourchapesPartie4: DterminationdelarsistancelusureBCA PrfverfahrenfrEstrichmrtelTeil4:Bestimmungdes VerschleiwiderstandsnachBCA T
9、hisEuropeanStandardwasapprovedbyCENon9October2002. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybe
10、obtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official version
11、s. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOM
12、ITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN138924:2002EEN138924:2002(E) 2 Contents page Foreword3 1 Scope 4 2 Normativereferences 4 3 Principle4 4 Symbols 4 5 Apparatus .4 5.1 BCA
13、abrasiontestmachine . .4 5.2 Markingouttemplate .5 5.3 Depthgauge . 5 6 Preparationofspecimens .6 7 Procedure .6 7.1 Depthgauge . 6 7.2 Settingup 6 7.3 Testoperation 6 8 Testreport . .7EN138924:2002(E) 3 Foreword Thisdocument(EN138924:2002)hasbeenpreparedbyTechnicalCommitteeCEN/TC303,“Floorscreedsan
14、d insituflooringsinbuildings“,thesecretariatofwhichisheldbyDIN. ItwaspreparedbyWorkingGroup2“ScreedmaterialsandfloorscreedsTestmethods”takingintoaccountthe proposalssubmittedbyWorkingGroup1“ScreedmaterialsandfloorscreedsDefinitions,propertiesand requirements”. ThisEuropeanStandardshallbegiventhestat
15、usofanationalstandard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbyMay2003,andconflictingnationalstandardsshallbewithdrawnatthelatestby May2003. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanS
16、tandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain, Sweden,SwitzerlandandtheUnitedKingdom.EN138924:2002(E) 4 1Scope ThisEuropeanStandardspecifiesamethodfordeterminingthewearresistanceoftestspecimensmad
17、efrom cementitiousorsyntheticresinscreedmaterialoroptionallyforotherscreedmaterials.Themethodisalsosuitable forfloorscreeds. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetex
18、tandthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoapplies(includingamendments). EN13813 ,Screedmat
19、erialandfloorscreedsScreedmaterialPropertiesandrequirements EN138921 ,TestMethodsforscreedmaterialsPart1:Sampling,makingandcuringspecimensfortest. 3Principle ThewearresistanceBCAofthescreedsurfaceisassessedbymeasuringthemeandepthofwearcausedbya machinewiththreehardenedsteelwheelsrotatingoveraringsha
20、pedareaforafixednumberofrevolutionsunder astandardload.Themeandepthofwearwithintheringpatternisusedtoindicatethewearresistanceofthe screedsurfaceatthetestlocation. 4Symbols AR isthewearresistanceBCA,whichisthemeandepthofwearin m m. d o isthemeandepthofthemeasurementsmadeatalleightmeasuringpointsprio
21、rtotestingin m m. d w isthemeandepthofthemeasurementsmadeatalleightmeasuringpointsaftercompletion ofthetestin m m. 5Apparatus 5.1BCAabrasiontestmachine Thetestmachinehasthefollowingfeatures,seeFigure1. a)Anabrasionheadconsistingofthreethroughhardenedsteelwheelsasdescribedine),tangentiallymounted ont
22、oacircularsteelplateatequalradialintervalssothewheelscanfreelyrotateinacircularpathwitha nominalmeandiameterof(2251)mm.Thewheelsarenotfreetorotateabouttheirverticalaxes. b)Anabrasionheadisconnectedbyashafttoanelectricmotorandgearboxcapableofrotatingtheabrasion headatamanufacturersratedspeedof(18015)
23、min 1 for(285010)revolutions.EN138924:2002(E) 5 Variationsinthemotorparameters,phaseandsupplyvoltagemaycausemarginalvariationsinrotationalspeed duringoperation.Thetestdurationof(285010)revolutionsoftheabrasionheadapproximatesto15min. c)Acircularsteelplate,towhichadditionalweightsarefixedsothatthetot
24、alloaddistributedtothewheelsis(65,0 0,5)kg.Theplateisconnectedtothemotorbyashaftthatallowsittomovevertically. d)Asteelframeonwhichthemotorandabrasionheadaremounted.Theframehas4feetbearingontothefloor surface.Theframeisrestrainedfromlateralmovementduringthetestbytwosteelpinsinsertedthroughtwo nominal
25、10mmdiameterholesdrilledinthefloorcoincidentwithlocatingholesinthefeetoftheframeatthe baseofdiagonallyoppositelegs. e)Steelwheelstothefollowingspecification: Diameter 76,00mmmaximum Width 20,0mmto20,1mm withchamfersof0,2mmto0,3mm. Vickershardness radius) Thiscanbeachievedbymanufacturingthewheelsfrom
26、toolsteel,withthefollowingheattreatment: Preheat 750Cto800C Hardeninairoroil 980Cto1030C Doubletemperfrom 500Cto520C andgrindingtotheexactspecification.Othermethodsofhardeningmaybeusedaslongasthespecified hardnessofthewearingsurfaceisobtained:Thewheelsshallhaveaminimumdiameterof73,0mmatany pointacro
27、ssthewheeltread.Wheelsshallbereplacedincompletesets. 5.2Markingouttemplate Acirculartemplate(seeFigure1)isusedtomarkoutthepositionofthedepthgaugefeetandtheholestobe drilledforlocatingtheframe.Theserestrainingpinholesare456mmapartandequidistantfromthecentreofthe wheeltrack.Theholesinthetemplatearepos
28、itionedatanequalradialspacingof45sothatwhenthedepth gaugeisplacedonthefloor,withitsfeetonthemarks,thegaugesliderrestsonthecentrelineofthewheeltrack. 5.3Depthgauge Thegaugeusedtomeasurethedepthofwearshallbecapableofbeingreadtothenearest10m.Thedistance betweenthefeetofthegaugeshallenableittostraddleth
29、ewheeltrackofthetestmachine.Theendoftheslider contactingthefloorshallberounded. Asteelshimof1,50mmto2,00mmthicknessisusedtosettheinitialpositionofthegaugesliderfromwhich subsequentreadingsaretaken.Alternatively,asetofstandardfeelergaugesmaybeused.Thedepthgaugemay thenbeaccuratelyresetifnecessaryduri
30、ngthecourseofthetestingandcheckedagainattheendoftestinginthe eventofbatterypowerfailure,etc.EN138924:2002(E) 6 6 Preparationofspecimens ThewearresistanceBCAshallbemeasuredon3specimensmadeinaccordancewithEN138921. Squareslabswithaminimumedgelengthof500mmandaminimumthicknessof50mmshallbeusedas specime
31、ns. Wherethescreedmaterialisnotdesignedtobeappliedatthisthicknessitshouldbeappliedontoaconcrete substrateaccordingtoEN138921. Thecontactfaceandtheoppositefaceofthespecimenshallbeparallelandflat. Itshallbeensuredthatthetestspecimenissurfacedryandfreeofcontaminants.Anydust,dirtordebrisshallbe removedw
32、ithabrushorbyvacuuming. 7Procedure 7.1Depthgauge Thedepthgaugeshallbeplacedonasuitableflatsurface:themarkingouttemplatecanbeused.Thepositionsof thethreefeetofthegaugeshallbemarkedsothatitcanberepositionedforlaterreadings.Insertthe1,50mm 2,00mmsteelshimundertheendoftheslider,ensuringthattheshimisinco
33、ntactwiththesurfaceandthatthe endofthesliderisincontactwiththeshim.Thereadingofthegaugeshallbesettozero.Thisenablesdepth readingstoberecordedaspositivevalues.Theshimshallberemovedanditshallbecheckedthatthegauge readstheshimthicknesscorrectlywhentheendofthesliderisincontactwiththeflatsurface.Alternat
34、ively,ifa specialjigissuppliedwiththegauge,themanufacturersinstructionsshallbefollowed. 7.2Settingup Themarkingouttemplateshallbeplacedinpositiononthescreedsurfaceandmarkthelocationsofthegauge feetthroughthe24holesusingamarkerpen.Thelocationsofthetworestrainingpinsshallbemarkedthroughthe holesontheb
35、arofthetemplate.Thetemplateshallberemoved,thetestreferencenumbershallbewrittenonthe specimenatthecentreofthetestareaandthenumberofthegaugepositions1to8shallbemarkedonthe specimen.Themarksandnumbersshallbecapableofbeingclearlyseenbeforeandafterthetestiscarriedout. Thedepthgaugeshallbeplacedaccurately
36、ateachofthe8measuringpositionsonthespecimenandtheinitial readingsshallberecordedtothenearest10 m m. Twonominal10mmdiameterrestrainingpinholesshallbedrilledatthemarkedpositions.Thedebrisanddust shallberemovedwithabrushorbyvacuuming. Thetestmachineshallbeassembledatthetestlocationandtherestrainingpins
37、shallbeinsertedthroughthefeet intotheholesinthetestspecimen.Itshallbecheckedthattheabrasionheadisfreetorotate. Thetestspecimenwiththemachineattachedmay,ifrequired,beplacedontoabedofsandorotherconformable materialsuchthatitisfullysupportedandcannotmovelaterally. 7.3Testoperation Thetestshallberunfor(
38、285010)revolutionsoftheabrasionheadusingasuitablerevolutioncounter. NOTE Screedsurfaceswithapoorresistancetoabrasionmaywearrapidlyunderthetest.Thesurfacematrixmay sometimesbelostwithinafewminutesandwhereaveryroughexposedaggregatetextureresults,thetestmachinemaybe subjecttoseverevibrationwhichcouldca
39、usedamage.Ifthishappens,orifthewearreachestheconcretesubstrate,thetest shallbestoppedimmediately.Inthiscase,includethenumberofrevolutionsandotherrelevantinformationinthetestreport .EN138924:2002(E) 7 Therestrainingpinsshallberemovedandthetestmachineshallbemovedawayfromthetestposition.Anydustor debri
40、screatedbythetestshallberemovedbybrushingorvacuuming. Thedepthgaugeshallbeplacedaccuratelyateachofthe8measuringpositionsonthespecimenandthe readingsshallberecordedtothenearest10 m m. Themeandepthofwearshallbecalculated,e.g.thewearresistanceBCA,usingfollowingequation: AR= d w d o Theresultshallbeexpr
41、essedtothenearest10 m m. Somescreedsurfacesmaybesubjecttolittleornowearfromthetest.Inthosecircumstancesthedepthreadings maybeofthesameorderastheaccuracyofthedepthgauge(10 m m)andasslighterrorsmayoccurin repositioningthedepthgauge,valueslowerthanthezeroreadingmaysometimesoccur.Wherethisoccursthe dept
42、hofwearshouldberecordedaszeroandnotasanegativevalue. Aphotographofthewearpatternverticallyfromabovemaybetakentoprovideinformationontheabraded surface. 8 Testreport Thetestreportshallincludethefollowinginformation: a) number,titleanddateofissueofthisEuropeanStandard; b) nameandaddressofthelaboratorycarryingoutthetestsandnameandaddressofthelaboratorypreparingthe samples(ifdifferent); c) identificationnumberofthetestreport; d) nameandaddressofthemanufacturerorsupplieroftheproduct; e) nameandidentificationmarksorbatchnumberoftheproduct; f) dateof
