1、BSEN138636:2024BSIStandardsPub1.icationConcretepavementsPart6:Testmethodforthedeterminationofthetensi1.estrengthofconcreteoncy1.indrica1.discsbsi.Nationa1.forewordThisBritishStandardistheUKimp1.ementationofEN138636:2024.(Tiunt1.tccpaB阿SiHMaIeria1.SPmP(WakinMeMaHW1.rus1.edtoTechnica1.A1.istoforganiza
2、tionsrepresentedonthiscommitteecanbeobtainedonrequesttoitscommitteemanager.-49Contractua1.and1.ega1.considerationsThispub1.icationhasbeenpreparedingoodfaith,howevernoimp1.ied)bemade,andnoundertaking1.iabi1.ityis性眦闻由M箱期IiWH地资忠ft制瞅轻弛麻廊W6P阳蝌蝌的Hbereasonab1.enessofthispub1.ication.A1.1.andanysuchresponsi
3、bi1.ityand11,ibs1.1.ybticxpotk1.diAXcuropAischcsKoMrrEEPOrnormungCENCENE1.ECManagementCentre:RucdeIaScience23,B1040Bnissc1.s分2024CENA1.1.rightsofexp1.oitsUoninanyformandbyan)meansreservedRefN111.1-SymbO1.SSymbo1.SignificationDimensionFdhabfCttCdTensi1.estrengthoncy1.indrica1.MPadiscs4Princip1.eFApre
4、ssiveforceFis1.inear1.yapp1.iedtoatestspecimenusingbearingstrips(seeFigure1).Therebyana1.mostunifonntensi1.estressinthetransversedirectionisproducedatthecentreofthetestspecimen.This1.oadingisapp1.iedunti1.fai1.ureocrs.Themaximum1.oadsustainedbythetestspecimenisusedtoca1.cu1.atethetensi1.estrengthonc
5、y1.indrica1.discs.tensi1.estressmpressivestressThedistributionofstesswithinthecy1.indrica1.discisshowninFigure1.Figure2showsatypica1.fracturepatternafterthetestKeypressiveforce*stresstensi1.estresscompressivestressFigure1Distributionofstresswithinthecy1.indrica1.disc5ApparatusFigure2Fracturepatterna
6、fterthetest5.1ApparatusforproductionofthetestspecimensCy1.indrica1.mou1.dmadeofstee1.withaminimumheightof/?=200mminaccordancewithEN12390-1.5.1.2S.1.3Sca1.ewithanaccuracyof0,1g.S.1.4Ca1.1.iperwithanaccuracyof0,1mm.5.1.5Straightedgeandfee1.ergaugetocheckthegapwidth.5.1.6Temperaturecontro1.1.edwaterbat
7、h(202),S.1.7C1.imatechambersetto(2012)and(655)%re1.ativehumidity.Sawingmachinetocutcy1.indrica1.discsastestspecimensfromseparate1.yproducedcy1.indersorcores.5.1.8S21.oaien*nCt0t*,cCUtsurfacep1.aneandpara1.1.e1.ifnecessary.5.2.1Testingmachine,c1.ass1inaccordancewithEN12390-4withamaximum1.oadofat1.eas
8、t100kNandforce-contro1.1.ed1.oadincreaseof(0,4+0,1)kNs.5.2.2Testdevicewithcenteringaidfora1.ignmentoftestspecimenintestingmachine(forexamp1.eseeFigure3).Figure3Examp1.eoftestdevicefortensi1.estrengthwithcenteringaidfora1.ignmentThetestdevicesha1.1.beequippedwithconcavecurvedupperand1.ower1.oadtransf
9、erbearingstripsofhardenedstee1.Theradiusofcurvatured/2andthewidthofthebearingstripsbhavetobeadaptedtotheradiusofthetestspecimenaccordingtotheFormu1.a(1):(/)(=sin2bd(1)where-45f1.fis15.To1.erancesonbsha1.1.be1.imitedtoamaximumof0,3mm.Fortestspecimenswithd=100mm,thesecantbofthebearingbariscorrespondin
10、gto13mm(seeFigure4).Figure4Testspecimenandbearingstrips5.2.3Betweenthebearingstripsandthetestspecimenanintermediatestripmadeoffe1.twithabu1.kdensityof(52052)kgm3withathicknessof(41)mmhastobeinserted,thedimensionsofwhichsha1.1.beat1.eastthe1.engthandwidthofthebearingbars.6Testspecimen6.1 Genera1.Thet
11、estspecimenssha1.1.haveadiameterof(1005)mmandaheightof(5015)mm.Inaddition,theratioh/dsha1.1.be(0,500,05),Testspecimenswith1.argerdeviationssha1.1.bediscarded.Otherdiametersmaybeusedifva1.idinthep1.aceOfuse,inadaptingtheheightofthetestspecimentokeeptheratioh/d(0,500,05).Theunevennessofthe1.atera1.sur
12、facea1.ongdiecy1.inderaxisofthetestspecimensha1.1.bemeasuredwithastraightedgeandfee1.ergaugeandthegapsha1.1.notexceed0,5mm.Testspecimenswhichdonotmeetthiscriterionsha1.1.bediscarded.Theang1.ebetweenthe1.atera1.areaandthebasesha1.1.he(903).A1.1.testspecimenssha1.1.bevisua1.1.yinspectedwithregardtothe
13、concretestructure(voids,porosity,irregu1.arities)anddamage.Anyirregu1.aritiessha1.1.heinc1.udedinthetestreport的PW1.h出惊岫ypt)ratio去1.rni1.hCdStQFiadU网膜如HtmenS6.1.1 Separate1.ymanufacturedtestspecimensSeparate1.ymanufacturedtestspecimenssha1.1.betakenfromcy1.inderswithadiameterd100mmandaheighth100mm,ca
14、stinaccordanceWithENt23904.Manufacturingdirect1.ythetestspecimendiscisnotpermitted.Thecy1.inderssha1.1.hestoredunti1.preparationofthetestspecimensinatemperature-contro1.1.edwaterbathat(202)0CinaccordanceWithEN4239g.Thetestspecimenssha1.1.besawnfromthebottomofthecy1.inders.Thebottomsurfaceofthetestsp
15、ecimensha1.1.notbeprocessedanyfurther.有K2TestspecimensmWtiw-ecft()re!fi1.inginatemperaturecontro1.1.edwaterbathat(202).Theconcretesha1.1.beat1.east14do1.d.beforecoresaredri1.1.ed.Thecoressha1.1.bestoredunti1.preparationofthetestspecimensin1.aboratoryconditionsatatemperatureof(205)Thefo1.1.owinginfor
16、mationsha1.1.bedocumented: thethicknessoftheindividua1.1.ayersofconcrete; thethicknessofthe1.ayeroffinemortaratthesurface; thetextureofthesurface; theestimatedmaximumaggregatesize; theresu1.tsofthevisua1.inspectionoftheconcretestructure(grave1.pockets,voids,porosity,irregu1.arities);theresu1.tsofthe
17、visua1.eva1.uationofthebondbetweentheconcrete1.ayers；thepositionandthediameterofreinforcementbars(inmm).texturedepthandthebottomsectionWithOUtanenc1.osedconcretestructuresha1.1.beremoved,interva1.Procedureresu1.tinamassdifferenceof1.essthan0,1%.Iftestspecimensarestoredinwaterpriortotesting,excessmoi
18、sturesha1.1.beremovedfromthesurfacetransverse1.yand1.ongitudina1.1.ycentredandpara1.1.e1.totheaxiswiththehe1.pofacenteringaid.Beforeoffe1.tareinsertedandrep1.acedwitheachnewtest.Uptoapre1.oadof0,4kNthetestspecimensha1.1.beRecordthemaximumapp1.ied1.oadindicatedbythetestingmachineatfai1.ure.counteract
19、ingforce,e.g.8Ca1.cu1.ationandpresentationofthetestresu1.t8.1 Testresu1.twd=2dFh,inMPa(2)ThePrecisionstrengthoncy1.indrica1.discssha1.1.bereportedtothenearest0t01MPa.AnestimateoftheprecisionofthistestmethodisshowninTab1.e2ascoefficientofvariation.Thissizeof32mm.Theyinc1.udesamp1.ing,productionoftest
20、specimens,andpreparationoftestspecimens.Ifthetestspecimensaretakenfromthetopandbottomofthecore,thesurfacetextureuptothe1.argestThetestspecimenssha1.1.bestoredunti1.testingat(202)and(655)%re1.ativehumidityoverat1.east3dunti1.aconstantmassismeasured.Themassisconsideredconstant,iftwotestsconductedatan7
21、of24hofthetestspecimens.Thetestdevicesha1.1.bep1.acedcentra1.1.yinthetestingmachine.Thetestspecimensha1.1.hea1.igned,the1.oadingofthetestspecimensthebearingstripssha1.1.bea1.ignedpara1.1.e1.toeachother.Thisa1.ignmentsha1.1.beensuredduringthetest.For1.oaddistributionbetweenbearingstripsandthetestspec
22、imen,stripshe1.dinitspositionbythecenteringaid.Afterreachingthepre1.oad,the1.oadsha1.1.beincreasedby(0,40,1)kN/sunti1.fai1.ureofthetestspecimen.resu1.tingfromthespringtensionofthetestdevice,sha1.1.betakenintoaccount.Notethetypeoffai1.ure(seeFigureA.1.inAnnexA)andappearanceoftheconcrete.Withtherecord
23、edmaximumapp1.ied1.oad,thetensi1.estrengthoncy1.indrica1.discsisca1.cu1.atedbyusingFormu1.a(2):6S8.2tensi1.eestimationisbasedonresearch,basedontheGermanstandardTPB-StBToi1.3.1.05.ThedatarefertoconcreteusedinconcretepavementswithCEM142,5NandCEM132,5Ruptoamaximumaggregatestorageandexecutionofthetestme
24、thodfortensi1.estrengthoncy1.indrica1.discs.Tab1.e2PrecisiondataCoefficientofvariationfortensi1.estrengthoncy1.indrica1.discsrepeatabi1.ity(%)reproducibi1.ity(%)9RePOrtt累CimCnStacnfr0tncorcs8,18,9Thetestreportsha1.1.containat1.eastthefo1.1.owinginformation:1) distinctdesignationanddescriptionofthete
25、stspecimens;2) dateofconcreteproduction;3) dateoftestspecimens*preparation;4) ageoftestspecimensattesting,additiona1.1.ydayswithairtemperaturesbe1.ow5;5) dimensionsoftestspecimens；6) massoftestspecimens;7) bu1.kdensityoftestspecimens；8) methodsusedforpreparationOftestspecimens(cutting,grinding);9) m
26、aximumfai1.ure1.oadatthetimeoffracturing;10) tensi1.estrengthoncy1.indrica1.discsca1.cu1.atedtothenearest0.01MPa;11) typeoffracturepatternordeviationsfromtypica1.fracturepatternsasshowninAnnexA;12) ifapp1.icab1.e,photographicdocumentationofthefracturepattern；13) anydeviationfromthetestmethod.Additio
27、na1.1.y,fortestspecimensproducedfromcores:a) distinctdesignationanddescriptionofthecore;b) dateofcoredri1.1.ing：c) ifnecessary,numberofthedayswithanaverageairtemperaturebe1.ow5;d) heightanddiameterofthecore;e) thicknessoftheindividua1.1.ayersofconcrete;0thicknessofthe1.ayerOffinemortar;g) structureofthesurface;h) visua1.aspectofthe1.owersurfaceofthecore；i) estimatedmaximumaggregatesize;j) visua1.examina
