1、BRITISH STANDARD BS EN 12274-4:2003 Slurry surfacing Test methods Part 4: Determination of cohesion of the mix The European Standard EN 12274-4:2003 has the status of a British Standard ICS 93.080.20 BS EN 12274-4:2003 This British Standard was published under the authority of the Standards Policy a
2、nd Strategy Committee on 21 May 2003 BSI 21 May 2003 ISBN 0 580 41902 9 National foreword This British Standard is the official English language version of EN 12274-4:2003. The UK participation in its preparation was entrusted by Technical Committee B/510, Road materials, to Subcommittee B/510/2, Su
3、rface dressing, sprays and slurry surfacing, which has the responsibility to: A list of organizations represented on 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 docume
4、nt may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by 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. U
5、sers are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for chan
6、ge, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 15 and a back cover. The BSI copyright date displayed in this do
7、cument indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN122744 February2003 ICS93.080.20 Englishversion SlurrysurfacingTestmethodsPart4:Determinationof cohesionofthemix Matriauxbitumineuxcoulsfroid
8、Mthodedessai Partie4:Dterminationdelacohsiondumlange DnneAsphaltschichtinKaltbauweisePrfverfahrenTeil 4:BestimmungderKohsionderMischung ThisEuropeanStandardwasapprovedbyCENon21November2002. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope
9、an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagema
10、debytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,N
11、etherlands,Norway,Portugal,Slovakia,Spain,Sweden,SwitzerlandandUn ited Kingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnati
12、onalMembers. Ref.No.EN122744:2003EEN122744:2003(E) 2 Contents page Foreword3 1 Scope 3 2 Normativereferences 4 3 Termsanddefinitions. .4 4 Principle4 5 Materials5 6 Apparatus .5 7 Calibrationoftestapparatus . .11 8 Preparationofsample . 11 9 Testprocedure .13 10 Expressionofresults 13 11 Testreport
13、14 Bibliography 15EN122744:2003(E) 3 Foreword Thisdocument(EN122744:2003)hasbeenpreparedbyTechnicalCommitteeCEN/TC227“Roadmaterials“,the secretariatofwhichisheldbyDIN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbyAugus
14、t2003,andconflictingnationalstandardsshallbewithdrawnatthelatestby December2005. ThisEuropeanStandardisoneofaseriesofstandardsaslistedbelow: EN122741, Slurrysurfacing - Testmethods - Part1:Samplingforbinderextraction. EN122742, Slurrysurfacing - Testmethods - Part2:Determinationofresidualbinderconte
15、nt. EN122743, Slurrysurfacing - Testmethods - Part3:Consistency. EN122744, Slurrysurfacing - Testmethods - Part4:Determinationofcohesionofthemix. EN122745, Slurrysurfacing - Testmethods - Part5:Determinationofwearing. EN122746, Slurrysurfacing - Testmethods - Part6:Rateofapplication. EN122747 1 , Sl
16、urrysurfacing - Testmethods - Part7:Shakingabrasiontestinsuitabilityofmineralaggregatesto slurrymixes. EN122748 1 , Slurrysurfacing - Testmethods - Part8:Visualassessment. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEur
17、opeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal, Slovakia,Spain,Sweden,SwitzerlandandtheUnitedKingdom. 1Scope ThisEuropeanStandarddescribesatestmethodfordeterminingtheminimumcohesionofaslurr
18、ysurfacingmix whichenablesthesettimeandtrafficabilitytimetobedetermined. ThisEuropeanStandardappliestoslurrysurfacingtobeusedinsurfacelayers. NOTE Forsomecoursemixturestheprecisionispoorduetolossofaggregatescomesup,acommentwillbemadeinthe report. 1 Inpreparation.EN122744:2003(E) 4 2 Normativereferen
19、ces ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetext,andthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standar
20、donlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoapplies(includingamendments). EN122743, SlurrysurfacingTestmethodsPart3:Consistency. ISO48,Rubber,vulcanizedorthermoplastic Determinationofhardness(Hardnessbetween10 IRHDand 100IRHD). 3 Term
21、sanddefinitions ForthepurposesofthisEuropeanStandard,thefollowingtermsanddefinitionsapply. 3.1 set endofthenonreversibleprocessinaslurrysurfacingwhentheemulsioncoalescencetakesplace NOTE1 Thecoalescenceofanemulsionisthenonreversiblephasestartingfromthebeginningofthebreakingofthe emulsiontothetotalse
22、ttingwhenthebitumenemulsionrevertstobitumeninpresenceofamineral. NOTE2 Afterthesetofaslurrysurfacing itisnotpossibletostirthemixture; freeemulsionduringwashingwithwatercannotbeobserved; anabsorbentpaperisnotstainedwhenpressedslightlyontothesurfaceoftheslurry. 3.2 settime timeelapsedbetweenplacingasl
23、urrysurfacinganditssetting 3.3 trafficabilitytime periodoftimeafterlaying,whentheslurrysurfacingcanaccepttraffic 3.4 quicksettingslurry slurrywithasettimelessthanorequalto30min 3.5 slowsettingslurry slurrywithasettimemorethan30min 4Principle Torquemeasurementsaretakenonfivesamplesofthesameslurrymixa
24、tsuitableintervalsaftercasting.EN122744:2003(E) 5 5Materials 5.1 Coarseaggregatesandsand Asufficientamountoftheseparatedaggregatestobeusedintheslurryshallbedriedinanovenat(110 5)Cto reachconstantmass. NOTE Constantmassisdeemedtobeachievedwhenthedifferencebetweensuccessiveweighingsat30minintervals do
25、esnotexceed0,1%ofthemass. 5.2Reactive filler Thefiller,e.g.cementorhydratedlime,shallbedriedinanovenat(110 5)Ctoreachaconstantmass. NOTE Constantmassisdeemedtobeachievedwhenthedifferencebetweensuccessiveweighingsat30minintervals doesnotexceed0,1%ofthemass. 5.3Emulsion Theemulsionshallbemanuallyhomog
26、enizedusingaglassrod. 6Apparatus 6.1 Apparatususedforpreparationofsamples 6.1.1Oven ,withaminimumcapacityof80lcapableofmaintainingatemperatureof(110 5)C. 6.1.2Balance ,accurateto0,1g. 6.1.3Timing device ,accurateto1s. 6.1.4 Metalsquareshapedmoulds,havingfourtruncoconicalholes(seeFigure1)ofthedimensi
27、onsgiven inTable1. Table1Dimensionsofmoulds Moulds Dimensions Holediameter mm Tolerances mm Width(W) mm Length(L) mm Height(H) mm upperD lowerD (W),(L) (H) (D,D) TypeA 140 140 6,3 60 60,3 TypeB 140 140 10,0 60 60,4 TypeC 200 200 13,0 90 90,6 TypeD 250 250 19,0 115 115,8 1% 1% 1%EN122744:2003(E) 6 Fi
28、gure1Metalsquareshapedmoulds,upperview,sideviewEN122744:2003(E) 7 Dimensionsinmillimetres Key 1Controlvalve 2Airpressuregauge 3Drivesocketforstraighthandleoftorquemeter 4Doubleactingdoubleendrodpneumaticcylinder 5Rubberfoot 6Autotireplug 7Sample Figure2Metalsquareshapemoulds,frontviewEN122744:2003(E
29、) 8 6.1.5 Endroundedspatula,ormetalrod. 6.1.6 Ladlesorbeakers ,of1land2lcapacity. 6.1.7 Roofingfelt ,forsampleholderofthesamedimensionsasthemouldsof(700 70)g/m. 6.2 Apparatususedfortesting 6.2.1Cohesion tester 6.2.1.1 General Acohesiontester,asshowninFigures2to4,shallconsistoftheelementsdescribedin6
30、2.1.2to6.2.1.7: 6.2.1.2 Doublerodendaircylinder,28,5mmindiameter,with8mmdiameterrodsand76mmstroke. 6.2.1.3 Neoprenerubberfoot,(60 2)degreesdurometerinaccordancewithISO 48,6,3mmheightand 28,5mmindiameter. 6.2.1.4 Airpressureregulator,withavariabledownstreambleedvalvesothatconstantpressureismaintaine
31、d. 6.2.1.5 Fourwaydirectionalcontrolvalve,withexhaustportregulatingvalves. 6.2.1.6 Airpressuregauge,witha0kPato700kPapressuregauge. 6.2.1.7 Torquemeter,capableofmeasuringandrecordingatleast3,5Nm(35kg/cm)torque. 6.2.2Air supply ,of700kPa.EN122744:2003(E) 9 Dimensionsinmillimetres NOTE Toleranceforthe
32、dimensions:1% Figure3Cohesiontester,sideviewEN122744:2003(E) 10 NOTE Toleranceforthedimensions:1% Figure4Cohesiontester,sideviewEN122744:2003(E) 11 7 Calibrationoftestapparatus 7.1Materials 7.1.1 Calibratedsand,withagradingcurveinaccordancewithTable2. Table2Gradingcurveofcalibratedsand Sieve mm Pass
33、ing % 1 0,5 85to100 0to5 7.1.2 P220gritsiliconcarbidesandpaper. 7.1.3 P100gritsiliconcarbidesandpaper. NOTE P220andP100accordingtoFEPAsystem(seeBibliography). 7.2Procedure Placethe220gritsandpaperinthecohesiontesterandmakeupto10measurementsinaccordancewithclause9 (withtheexceptionofthetimeintervals)
34、inordertopolishtherubberfoot.Continuetestsuntilaconstantreadingis achieved. Oncetherubberfootispolished,placethecalibratedsandinthe10 mmhighmouldandtakeaseriesof measurementswiththetorquemeterinaccordancewithclause9(withtheexceptionofthetimeintervals)untila constantreadingisachieved. Placethe100grit
35、sandpaperinthecohesiontesterandmakeaseriesofmeasurementsinaccordancewith clause9(withtheexceptionofthetimeintervals)untilaconstantreadingisachieved. Thecohesiontestershallthenbedeemedtobecalibrated. Thecalibrationshallbecarriedoutatleastonceperyear. 8 Preparationofsample 8.1Temperature Allmaterialst
36、hataregoingtobeusedinsamplepreparationshallremainattemperatureof(23 2)Cforatleast 2hbeforetesting. 8.2Water TheproportionofwatershallbepreviouslydeterminedaccordingtoEN122743. NOTE Inquicksettingslurries,thistestissometimesdifficulttocarryout.Insuchcasestheamountofwatershouldbe determinedbyobservati
37、ontoensurecompletehomogeneity.EN122744:2003(E) 12 8.3 Aggregatesandfiller Weighaggregatesandfillerinthesameproportionsasthedesignmixandplaceintoaladleorbeakerofasize conformingtoTable3andmixwithaspatulauntilahomogeneousmixtureisobtained(approximately1min). Table3Samplesize Maximum aggregatesize mm A
38、mountofaggregates andfiller g Ladleorbeakersize l 4 5,6 6,3 8 400 1 10 11,2 16 900 2 8.4 Waterandadditive Addwaterandadditive,(ifnecessary)andstirthemixtureuntilalltheaggregatesandfillerarecompletelywetted. Thecalciumcarbonatecontentofthewatershallbelessthan250ppm. 8.5 Preparationofthemix Addthecorr
39、espondingamountofemulsiontothatrequiredinthedesignandstirusingaspatulaormetalroduntil avisualhomogeneousmixtureisobtained.Themixingtimeforquicksettingslurriesshallbe(45 1)sandforslow settingslurriesshallbebetween(60 1)sand(180 1)s. 8.6 Samplesize Preparethesampleinmetalsquareshapemouldscorresponding
40、tothemaximumsizeoftheaggregatein accordancewithTable4.EN122744:2003(E) 13 Table4Mouldsize Maximum aggregatesize mm Mouldsize 4,0 5,6 A 6,3 8,0 B 10,0 11,2 C 16,0 D Centrethemouldoverthesupportsandpourtheslurryintoit.Spreadthesampleandlevelituntilalevel,uniform andsmoothsurfaceisobtained.Duringthisop
41、erationthehandlingoftheslurryshallbeminimizedtoavoid segregation. 8.7Curing Removethemouldsafterthesettingofthemixandkeepthesamplesatatesttemperatureof(23 2)C. 9 Testprocedure Torquemeasurementsshallbemadeatintervalsof15min,30min,60min,90minand120minaftercasting. NOTE1 Theseintervalsareprovisionalan
42、dshouldbeconfirmedbyRoundRobinTests. Thetestshallbeperformedat(23 2)C. NOTE2 Forparticularpurposes,thetorquetestmaybeperformedatotherfixedtemperatures. Centrethespecimenundertheneoprenefoot,withtheinstrumentairpressuresetat(200 4)kPa,andlowerthe footagainstthespecimenatarateof80mm/sto100mm/s. Placin
43、gthefoot,zerothetorquemeterandplaceitonthetopcylinderrodendandtwistitinasmooth,firm, horizontalmotionthrougha90to120arcwithin0,5sto0,7s. Recordthetorquereadingandthetime. 10 Expressionofresults Resultsshallberecordedatthetimeintervalsmentionedinclause9untiladefinitetrendisestablishedandplotted ontographpaper. NOTE
