1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1877-2:2000 The Eur
2、opean Standard EN 1877-2:2000 has the status of a British Standard ICS 91.080.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Products and systems for the protection and repair of concrete structures Test methods Reactive functions related to epoxy resins Part 2: Determinat
3、ion of amine functions using the total basicity numberThis British Standard, having been prepared under the direction of the Sector Committee for Building and Civil Engineering, was published under the authority of the Standards Committee and comes into effect on 15 October 2000 BSI 10-2000 ISBN 0 5
4、80 36600 6 BS EN 1877-2:2000 Amendments issued since publication Amd. No. Date Comments National foreword This British Standard is the official English language version of EN 1887-2:2000. The UK participation in its preparation was entrusted by Technical Committee B/517, Concrete, to Subcommittee B/
5、517/8, Protection and repair of concrete, which has the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European
6、developments and promulgate them in the UK. 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 document may be found in the BSI Standar
7、ds Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for
8、 their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. 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 notice displayed in this docume
9、nt indicates when the document was last issued.EUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN18772 July2000 ICS91.080.40 Englishversion Productsandsystemsfortheprotectionandrepairofconcrete structuresTestmethodsReactivefunctionsrelatedtoepoxy resinsPart2:Determinationofaminefunctionsusingthetotal
10、 basicitynumber Produitsetsystmespourlaprotectionetlarparationdes structuresenbtonMthodesdessaiFonctions ractivesliesauxrsinespoxydesPartie2: Dterminationdesfonctionsaminesparlindicedebasicit totale ProdukteundSystemefrdenSchutzunddie InstandsetzungvonBetontragwerkenPrfverfahren Reaktive,funktionell
11、eGruppenvonEpoxidharzenTeil2: BestimmungderAminzahlanhanddes Totalbasizittsgrades ThisEuropeanStandardwasapprovedbyCENon7July2000. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration
12、.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoit
13、sownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom.
14、EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG CentralSecretariat:ruedeStassart,36B1050Brussels 2000CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN18772:2000EPage2 EN18772:2000 Contents Page Foreword. 2
15、1Scope 3 2 Normativereference . 3 3 Termsanddefinitions 3 4 Principle 3 5 Sampling . 3 6 Apparatus 3 7 Reagents . 4 8 Preparationoftheperchloricacid(0,1mol/l)inaceticacid . 4 9Standardization .4 10 Calculationoftheconcentration . 5 11 Procedure. 5 12Calculation. 5 13Precision. .6 14Test report. .6 B
16、ibliography.7 Foreword ThisEuropeanStandardhasbeenpreparedbyTechnicalCommitteeCEN/TC104“Concrete(performance, production,placingandcompliancecriteria)“,thesecretariatofwhichisheldbyDIN . ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextorby endorsement
17、,atthelatestbyDecember2002,andconflictingnationalstandardsshallbewithdrawnatthelatestbyDecember 2002. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Ge
18、rmany,Greece,Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal,Spain,Sweden, SwitzerlandandtheUnitedKingdom. ThisEuropeanStandarddescribesseveraltypeoftestmethods.Specificationsfortheproductsandsystemsforthe repairandtheprotectionofconcretestructureswillbesubjectofseparatestandards.Page3
19、EN18772:2000 1 Scope ThisEuropeanStandarddescribesamethodfordeterminingtotalbasicitynumberofaminesandisapplicableto aminebasedhardenersusedintheepoxyresins. 2 Normativereference ThisEuropeanStandardincorporatedbydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecite
20、dattheappropriateplacesinthetextandthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoapplies(including
21、amendments). EN21512 PaintsandvarnishesSampling ofproductsinliquidorpasteform(ISO1512:1991) 3 Termsanddefinitions ForthepurposesofthisStandard,thefollowingtermsanddefinitionsapply: 3.1 totalbasicitynumber quantityofperchloricacidnecessarytoneutralizetheaminefunctionsof1gramoftheproduct. 4 Principle
22、Thetotalbasicitynumberisdeterminedbytitrationoftheaminenitrogeninanaceticacidmediumagainst0,1mol/l perchloricacid. 5 Sampling ArepresentativeandhomogeneoussampleofthematerialtobetestedshallbetakenaccordingtoEN21512. Eliminatemineralfillerandpigmentswithasuitableorganicsolventbeforethedeterminationof
23、thetotalbasicity.It shouldbechecked,thatanysolventhasreallyevaporated. 6 Apparatus Balance,accuratetowithin0,1mg. Calibratedburette,capacity25ml. Pipettes,capacity10mland20ml. Conicalflask,100mlor200ml,withgroundglassneckandgroundglassstopper. Instrumentandelectrodesforpotentiometrictitration. Inadd
24、ition,whenpreparedthe0,1mol/lperchloricacidinaceticacid. Magneticstirrerwithpolytetrafluoroethylenecoatedbar. Calibratedthermometertopermittemperaturemeasurementswithinanaccuracyof0,1K. Volumetricflask,1000ml. Graduatedcylinders,50mland500ml.Page4 EN18772:2000 7 Reagents Fortheanalysis,onlyreagentso
25、fanalyticalgradeshallbeused. Perchloricacid0,1mol/linaceticacid(Standardvolumetricsolution). Aceticacid99%to100%. Crystalviolet,0,1%insolutioninaceticacid. Potassiumhydrogenphthalate. Inaddition,whenpreparedthe0,1mol/lperchloricacidinaceticacid. Aceticacid99%to100%. Aceticanhydride,purity96%. Perchl
26、oricacid,70%. Sodiumhydroxidesolution,0,1mol/l. Phenolphthalein,0,1%solution. Distilledwater. 8 Preparationoftheperchloricacid(0,1mol/l)inaceticacid WARNINGTheuseofsafetygogglesandasafetyscreenisrecommended. Determinationofthetruepercentageoftheapproximately70%(m/m)perchloricacid.Weighapproximately0
27、,3g oftheperchloricacid(E 1 )ina200mlconicalflash,add50mldistilledwaterandmixthoroughly.Titrateitagainst 0,1mol/lsodiumhydroxidesolution(V 1 )usingthephenolphthaleinindicatorsolution.Thecontentofperchloricacid isgivenbytheequation: where P =contentoftheperchloricacid; E 1 =isthemassin(g),oftheapprox
28、imate70%perchloricacid; V 1 =isthevolume,in(ml),ofthe0,1mol/lsodiumhydroxidesolution; F naOH =isthefactorofthe0,1mol/lsodiumhydroxidesolution. Weighthecalculatedmassofthe70%aqueoussolutionoftheperchloricacidtoanaccuracyof0,1mgintoa 1000mlvolumetricflask.Add300mloftheaceticacidfollowedby50mloftheacet
29、icanhydrideundercooling. Thetemperatureofthesolutionshallbekeptat20C.Diluteto1000mlwiththeaceticacidandmixthoroughly. Thesolutionshouldnotshowanydiscolorationtoyellowforaperiodof12h.Thencarryoutthestandardization. 9 Standardization a)Standardizethissolutionbytitratingitina200mlconicalflaskto300mgto5
30、00mgpotassiumhydrogen phthalatedissolvedin15mlaceticacid,usingthecrystalvioletindicatorsolution.Ifnecessary,drythepotassium hydrogenphthalatefor24hoursat120Cbeforeuse.Carryouttheendpointdeterminationusing4to6dropsof thecrystalvioletindicatorsolution,titratinguntilastablegreencolourisobtained.Recordt
31、hetemperature t s ofthe standardvolumetricsolution.Carryoutadoubledetermination. NOTE Ifthepotentiometricmethodisusedforthedeterminationoftotalbasicitynumber,itisrecommendedtousethe samemethodforthestandardizationoftheperchloricacid. b)Alternative:Usethemanufacturersconcentrationofthesolution. P= E
32、1000 V F 1 1N a O H Page5 EN18772:2000 10 Calculationoftheconcentration Theconcentrationcoftheperchloricacidsolutioninmolesperlitreisgivenbytheequation: where E 2 :isthemass,in(g),ofpotassiumhydrogenphthalateused; V 2 :isthevolume,in(ml),oftheperchloricacidsolutionusedinthetitration. 11 Procedure We
33、ighapproximately250mgofthetestportiontowithin0,1mgandintroduceintoa200mlconicalflask(this testsamplewilldependonthebasicityoftheproductandmaybemodified). Dissolvethistestportionin50mlaceticacid. Ifusingtheindicatormethod,add4to6dropsofcrystalvioletsolutionandtitratethesolutiononthemagnetic stirrerwi
34、ththeperchloricacidsolution. Carryoutthetitrationuntilastablegreencolourisobtained. Ifusingthepotentiometricmethod,placetheelectrodesinthetestsolutionandtitratethesolutiononthe magneticstirrerwiththeperchloricacidsolution. Notethetemperaturetoftheperchloricacidsolutioninordertobeabletoallowforexpans
35、ionofthesolution withincreasingtemperature. Carryoutablanktestatthesametimeasthedetermination,followingthesameprocedureandusingthesame reagentsbutomittingthetestportion. 12 Calculation Calculatethebasicitynumber,usingthefollowingformula: where m isthemass,in(g),ofthetestportion; V 0 isthevolume,in(m
36、l),oftheperchloricacidsolutionusedintheblanktest; V 1 isthevolume,in(ml),oftheperchloricacidsolutionusedinthedetermination; tisthetemperature,in(C),oftheperchloricacidsolutionatthetimeofthedeterminationandblanktest; t s isthetemperature,in(C),oftheperchloricacidsolutionatthetimeofstandardization; ci
37、stheconcentrationoftheperchloricacidsolution(usually0,1mol/l)atthetimeofstandardization. NOTE Theuseofthecorrectionfactorisrecommendedbecauseofthesignificantcoefficientofexpansionoftheperchloric acidsolution(1,07x10 3 K 1 ),whichcorrespondstoavolumevariationof0,1%perdegreeKelvin.Useofthisfactorcanbe
38、 avoidedbyworkinginatemperaturecontrolledroom. c= E V 0,2042 2 2 Basicitynumber(mol/kg)= ( ) VVc tt m s 10 1 1000 - - Page6 EN18772:2000 13 Precision Repeatabilitylimit :1% Reproducibilitylimit :2%. 14 Testreport Thetestreportshallincludethefollowinginformation: a) areferencetothisEuropeanStandard;
39、b) alldetailsnecessarytoidentifytheproducttested; c) thetotalbasicitynumber(mol/kg)andthewayinwhichitisexpressed; d) anyotherfactorlikelytohaveaffectedtheresult; e) anydeviations,byagreementorotherwise,fromtheproceduredescribed; f) thedateoftest.Page7 EN18772:2000 Bibliography ISO3001:1997 PlasticsE
40、poxycompoundsDeterminationofepoxyequivalent .BS EN 1877-2:2000 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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