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Issue 14 - Summer 2015CPATT NEWS
Contents:• FeatureFaculty• ResearchFocus• StudentFeature• FieldFocus• Individual
Highlights• Awardsand
Recognition• Norman
McLeodChair• ContactUsand
Upcoming
Message from the Director
WelcometoourSummer2015additionofCPATTNews!
Wehopeallyourprojectshavebeensuccessfultodateandwishyouallcontinuedsuccessastheconstructionseasonprogresses.
InthisnewsletterwehighlightsomeofthevariousprojectsunderwayatCPATT.Also,wehighlightsomeeventsandspecialfeatures.
Shouldyouhaveanyquestionsrelatedtoouractivitiespleasedonothesitatetocontactus.
Sincerely,
SusanL.Tighe,PhD.,P.EngProfessorandNormanW.McLeodProfessorinSustainablePavementEngineeringDirectorofCPATT
CSCEChapterFieldVisittoPearsonInternationalAirport
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FacultyFeature
Dr. Carolyn Hansson, Ph.D., P.Eng.Dr. Carolyn Hansson is a Professor in both the Mechanical andMechatronicsEngineeringandtheCivilandEnvironmentalEngineeringDepartmentsattheUniversityofWaterlooandafacultymemberoftheCentre for Pavement andTransportationTechnology. She received herB.Sc., A.R.S.M, D.I.C and Ph.D in Metallurgical Engineering fromImperialCollege,LondonUniversity.Shehas lived andworked in theUK, USA, Denmark, and Canada and has been employed in privatesectorresearch(MartinMariettaResearchLaboratoriesandAT&TBellLaboratories - now Lucent Technologies), a not-for-profit consultingcompany (the Danish Corrosion Centre) and in academia (ColumbiaUniversity, theStateUniversityofNewYorkatStonyBrook,Queen’sUniversityandtheUniversityofWaterloo).
She was Vice-President University Research at Waterloo, and wasresponsible for facilitating the research activities of faculty membersacross all disciplines of the university.After this, she reverted to her
favouriterolesasresearchengineerandinstructorandmentorforstudents.
Herresearchhascoveredmanyaspectsofenvironmentaldegradationofmaterials,particularlythecorrosionanderosionofmetalsandalloys.Overthelast20years,hermajorfocushasbeenthedurabilityofinfrastructurematerials,particularlythechloride-inducedcorrosionofreinforcingbarandthosepropertiesoftheconcretewhichaffectthisprocess.Dr.Hanssonhaspublishedover160papersandreportsandhasconductedover50researchprojectsontimeandwithinbudget.Inaddition,shehasworkedwithconsultingcompaniesandtheMinistryofTransportationOntarioincorrosionmonitoringofbridgestructures,withAlbertaTransportationinevaluatingrebarcorrosionproblemsandinthedesign,installationandmonitoringofcorrosionprobesinseveralbridgestructuresinB.C.,oneinNovaScotiaandintheConfederationBridge(althoughtheprobesin the latterwerenotmonitored).Hercurrentresearchisfocusedontheapplicationofcorrosion-resistantalloysasreinforcingmaterialswithaviewtounderstandingtheinfluenceofthemetallurgyonthecorrosionresistanceandpredictionoftherelativelife-cyclecostsofthedifferentalloys.
She has served on a number of professional boards and committees including the Natural Sciences andEngineeringCouncilofCanada,theMinister’sNationalAdvisoryCouncilforCANMET,theUSNationalMaterialsAdvisoryBoard aswell as the boards of a number of not-for-profit technical and professionalorganizations.SheisalicensedProfessionalEngineerinOntarioandaCharteredEngineerintheUK.SheisaFellowoftheRoyalSocietyofCanada,theCanadianAcademyofEngineering,theDanishAcademyofTechnicalSciences,theUSMinerals,MetalsandMaterialsSociety,theUKInstitutionofMaterials,MineralsandMiningandtheAmericanConcreteInstituteandistherecipientofanumberofprofessionalawards.
InJuly2015,CarolynwasnamedaMemberoftheOrderofCanadaforhermanycontributions.CongratulationsCarolyn!
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ResearchFocus-StructuresLab
Fatigue Resistance of Shear Stud Connectors on Steel GirdersThe fatigue resistance of bridges is a key topicrelated to transportation infrastructure durability. Itis especially important for bridge components thatcannotbeinspectedforsignsoffatigue.In2014,tworesearch projects on the fatigue resistance of studshearconnectorswereinitiatedatUW,sponsoredbytheOntarioMinistryofTransportationandtheSteelStructures Education Foundation (with additionalsupportfromNSERC).Anin-depthliteraturereviewdefinedthegapsthattheexperimentalandanalyticalresearch would address. Specifically, these gapsinclude the inconsistent practice of using push-testdataasasafeguide todesigningshearstuds incompositebeams,andthequestionoftheconsequenceoffailureofindividualshearstudsonthecapacityofabridge.The latterquestion isespecially importantas bridges become older and their replacement isdelayedinjurisdictionswithaginginfrastructureandlimitedmaintenancebudgets.
Theresearchisinvestigatingthefatigueperformanceof the shear studs in composite bridge girderswithtwoconfigurations.Thefirstconsidersastandardcast-in-placeconcretedeckconstructionwithdistributedshearstuds.Thesecondconsidersfull-depthprecastconcrete decks that utilize grouped shear studscoincidingwithpocketsinthedeckpanels.Thelattersystemisusedwhenacceleratedbridgeconstructionis desired. The experiment design was undertakento ensure that the planned fatigue tests could becompletedinatimelymanner,andthatkeybehaviourcouldbeobservedbytheplacingofinstrumentation.The experimental design included connectorspacing, cyclic loading locations and magnitudes,andconstructionmaterials.Beamfabricationisnowunderway,andtwelvecompositebeamsincludingsixcast-inplacebeamsandsixprecastbeamshavebeencasttodate.
Photosofthespecimensareshown.
Fatiguetestingwillbeinitiatedthissummer.
Thetaskoffiniteelementanalysishasbeenongoingsince the experiment design stage. One model hasbeen developed of the experiment specimen, andanother is being developed of a full bridge. Thesemodels will be used to assess the experimentalresultsandareliabilityanalysiswillbecarriedouttoquantifytheconsequenceofshearconnectorfailure.Thetestprogramwillsignificantlyaddtotheexistingdataofshearconnectorfatiguebeams.Thenextstepsinclude testing of the first six beams specimens,fabrication of six more beams (the forms will bereused),andcontinuinganalyticalwork.ContactDr.ScottWalbridge,Dr.JeffWest,MatthewSjaarda,orTaylorPorterforfurtherdetails.
Cast-In-Place Slab Specimen (note girder)
Specimens after casting (precast with stud pockets)
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StudentFeature-SoniaRahman
Development of Durability Performance related Test Methods for Pervious Concrete PavementThis research is being funded by the Ministry ofTransportation Ontario (MTO) under the HighwayInfrastructureInnovationFundingProgram(HIIFP).Other funding provided for this project is from theCement Association of Canada (CAC) and theNatural Science and EngineeringResearchCouncilofCanada(NSERC).
Theintroductionofperviousconcreteintopavementsincoldweatherclimaticregions,specificallyCanada,was driven by their sustainable benefits. However,therehasbeencautioninthepavementindustrytotheuseofperviousconcreteinclimatesthatexperiencefreeze-thawcycles.
This research was intended to examine which testmethods should be used to ensure a high qualitypervious concrete pavement is achieved. Anotherobjective of this research was to evaluate theperformancecriteriaforperviousconcretepavementtested for flexural strength, ravelling, abrasion,permeability, scaling resistance, and freeze-thawresistance.
Themajoroutcomeof this research is todefine thedraft testmethods for pervious concrete pavement.Also,fieldsampleswerecollectedfromselectedfieldsitesandthedraftmethodswereperformedtoevaluatethe applicability of the developed testmethods anddetermined the probable reason of observed fielddistresses.
Meet Sonia RahmanSonia is a MASc. Candidate in the department of Civil andEnvironmentalEngineeringattheUniversityofWaterloo,underthesupervisionofDr.SusanTighe.Soniawasbornandbroughtup inBangladesh. She completed her undergraduate studies in2012at theUniversityofEngineeringandTechnology, thebestengineering university in Bangladesh. She started her careerworkingataconstructioncompany inherhomecountry.Soniaalwayshadadesiretocontinuehereducation,soshestartedherMastersdegreeintheCPATTgroupinWinter2013.
Inadditiontoherstudies,shehasalsobeenservingastheVicePresidentInternalfortheGraduateStudentAssociation(GSA)attheUniversityofWaterloofromMay2014.
SoniacompletedherMastersDegreeinWinter2015.
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StudentFeatureandProjectCont’d
Aframeworkwasalsodevelopedtoidentifyhowperviousconcretecanbeintegratedintolowvolumeinfrastructurewithdetailedfunctionalandstructuraldesignconsiderations,whichcanhelpthedesignersatimplementingthetechnology.
Perviousconcrete FrequencyTesting for FreezeThawResistance
HamburgWheelRuttingTesting
AbrasionTesting
ScalingResistanceTesting
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StudentFeature-YassamanYousefi
Meet Yassaman Yousefi
YassamanYousefi is a Ph.D Candidate in the civil and environmental department at the University ofWaterloo.YassamancompletedherBScincomputerengineeringinIranandherMScinITmanagementatLancasterUniversityinEngland.Afterfinishinghermaster’sdegreeinEngland,shehasbeeninvolvedwithprojects relating tomaterialprocessingandplanningaswellasmanagement for the last tenyears.InJune2012,Yassamanbecamearesearchmemberinaprojectgroupforresearchandanalysisofanewinnovativeinsulationmaterialbasedonrecycledglass.Followingthisresearch,YassamanjoinedtheCentreforPavementandTransportationTechnologyandthedepartmentofcivilandenvironmentalengineeringtoworkonherPhdintheareaoffoamglassaggregate.
Glassisidealforrecyclingandcanberecycledmultipletimes.Currently,theusageofglassisincreasingespecially in the food and beverage industry due to health concerns.Therefore, recycling of glasses isbecomingabigdilemmainCanada.Differentglassessuchascontainermixedglasses,floatglass,windshieldglass and contaminated glass are being vigorously collected but poorly recycled.Less than 30%of the400,000tonnesofwasteglassinOntarioiscurrentlyrecycledandabigpartofthisisfinepowderwastewhichgoestolandfills.
One solution is foam glass aggregate. Foam glass is normallymade from 97% recycled glass. It is aninnovativelightweightmaterialforapplicationsinroadconstructionandbuildingindustries.Therecycledglassusedinthepresentformulationcanbetakenfromclearandmixedcolouredindustrialwastes.
Theinnovativepropertiesofthematerialsuchasanti-bacterial,catalyticandhydrophobicareconsideredforsurfacetreatmentofthematerials.Usingthismaterialinsubbasewillpreventfrostheaveandcrackingduring spring time as theuniquedrainage characteristic of thismaterial doesnot allow thewater to betrappedandabsorbedintheaggregatelayers.
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FieldWorkFocus
A project currently being studied at CPATT is theconcreteoverlay rehabilitationofSpraguesRoad inthe Region ofWaterloo. The initial study involvedmonitoringthetrafficmanagementstrategiesatthesitetoproduceacasestudyforeffectivemanagementofa2laneruralhighwayoverlay.Thestudyinvestigatedthe effectiveness of signage, maintaining residentaccess toproperties, construction staging strategies,andmodificationstoalloftheseaspectswhichweremadetofacilitatetheprocess.During concrete placement, strain gauges wereinstalledattheinterfacebetweentheconcreteandtheasphalt separation layer.These gaugeswill provideinsightintothestrainbehaviouratthebottomoftheunbondedoverlay.Thestrainsobservedwillbebothstaticanddynamicinnature.
Concrete overlay being placed at Spragues Road, Region of Waterloo
Strain gauge affixed to asphalt separation layer
Anotheron-goingproject atCPATT is studying thepotential of using recycled asphalt and concretein the production of unshrinkable fill. U-fill, as itis known, is a flowable material which does notrequirecompactionorvibration.Thismakesitidealforbackfillingapplicationswhichhave traditionallyusedgranularfill, suchbackfillingsewerandutilitytrenchesandretainingwalls.U-fillhaslowstrengthincomparisontotypicalconcreteinordertofacilitatehandexcavationatlaterpointsintime.Asaresult,itcouldpotentiallybeanidealapplicationfortheuseofrecycledmaterials.Test sectionsofU-fillwithvaryingproportionsandtypes of recycled materials have been placed aspart of a study involving the City of Toronto, TheMillerGroup,LVM,andtheCementAssociationofCanada.Currentlylabworkison-goingtodeterminethe idealmixture proportions ofU-fill to limitmixwater bleedingwhilemaintaining sufficient bearingcapacity.
U-fill sample during bleeding test
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Highlights
An ongoing research atCPATT is to identify effective futuremaintenance and rehabilitation practices tomaintain the structural, colour, and functional performance of the coloured asphalt design forBusRapidTransit (BRT) lanes locatedalong the threemostheavily travelled roads inYorkRegion,Ontario;YongeStreet,Highway7,andDavisDrive.
Currently,plantandlaboratoryproducedcolouredasphaltmixturesarebeingtestedatCPATTtoevaluatethecurrentperformanceandpredictthefutureperformance.Theseresultswillbethenintegratedwithfieldobservationsandautomateddistressessurveyofexistingroadsectionstoprovideagreaterunderstandingofthematerial.Also,CPATTisworkingcloselywiththeYorkRegionandtheconstructioncontractorplanningtoinstallsensorsthatarecapableofcapturingpavementresponsesunderheavyarticulatedbusloadings,aswellasclimaticconditions.Pavementresponsescanbethenusedtodevelopdeteriorationmodelstoprovideaccuratemeasureoflong-termbehaviourofcolouredasphaltpavement.
Highway7BRT-Lane,YorkRegion,Ontario,May2015
Pavingmixturepiling
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HighlightsCont’d
RedAsphaltpavingonasectionofHwy7BRTLane,YorkRegion,August2014
Samplingofthematerial TypesofsensorsforasectionofYorkRegionBRTLane
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AwardsandRecognition
AwardsandRecognition2015 President’s Graduate Scholarship - Dan Pickel- Awardedtorecognizetheoutstandingachievementsandpotential.
2015 Ontario Graduate Scholarship - Sina Varamini-Awardedforexcellenceinagraduateprogram
2015 Order of Canada - Dr. Carolyn Hansson-awardedforhercontributionsasamaterialsengineerwhoseeffortshavereducedcorrosionandimprovedtheperformanceofreinforcedconcretestructures.
2015 Engineering 3 Laboratory named in honour of Ralph Haas -theInfrastructureandSensingAnalysisLaboratoryforhismanycontributionstoUW.Moreinformationcanbefoundhere.
NewBaby
CongratulationstoHanaaAl-BayatandherhusbandWaleedAzizonthearrivaloftheirnewbeautifulbabygirl,AnasWaleedAziz.ShewasbornonJanuary22,2015at5:45pm.
Congratulations to Marcelo Gonzalez andhiswifeGloriaStephensonthearrivaloftheirbeautifulbabygirl,SofiaGonzalezStephens.ShewasborninSantiago,ChileonJuly6,2015andweighed3.2kg.
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NormanW.McLeodChairinSustainablePavementEngineering-NewStudents
HawraaKadhimisaPh.D.studentintheCivilandEnvironmentalEngineeringDepartmentattheUniversityofWaterloo.ShereceivedherM.Sc.degreeinTransport Engineering and Planning from London South Bank, England in2013-2014andaB.Sc.degreefromAlmustansriaUniversity,Iraqin2012.HawraajoinedtheCPATTteaminWinter2015.HerPh.D.researchfocusesontheinvestigationoftheuseofsome“magic”additivetotheasphalttohelpself-heal after fatigue or thermal cracking ormitigate the initiation and thepropagation of these cracks. She currently investigates the impact of usingPhase-ChangeMaterials to generate local heat at cold temperatures in theasphaltbinderwhichwouldhelpasphalttodissipatethermalstresses.Shealsostarted investigating theuseofSelf-HealingMaterials thatwould repair thecracksinthemixbutalsotheuseofanti-oxidantstodelaybinderageingandthendelaycracking.
Hawraa is fan of history and cultures. She loves reading and travelling todiscovernewplacesandmeetwithpeople.
AdamSchneider is aMASc student in theDepartment ofCivil and Environmental Engineering at the Universityof Waterloo. He completed his BASc in GeologicalEngineeringatWaterlooin2011.HesubsequentlyworkedatThurberEngineeringinOakvilleandatCapitalPavinginGuelphbeforejoiningCPATTinMay2015.Hisresearchiscomposedoftwoprojectswithacommonthemewhichistheuseofsustainablealternativematerialsintheunboundlayersofthepavementstructure.Thefirstprojectissupportedby
MTOandAggregatesRecyclingOntario(ARO)ontheexpandeduseofrecycledconcretein“GranularB”typematerials.Thesecondprojectevaluatethepotentialoftheuseoffoamedglasslightweightaggregate(LWA)inunboundgranularlayers.ThisprojectissupportedbytheprivatesectorandtheOntarioCentreofExcellence(OCE).
Adam is anAlumni Representative on the Board of Directors of theWaterloo Engineering EndowmentFoundation(WEEF).HealsoisamemberoftheUWACappellaClub(UWACC)andhevolunteerswiththeKnightsofColumbus.
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NormanW.McLeodChairinSustainablePavementEngineering-Cont’d
Taher is a PhD student in the Department of Civil and EnvironmentalEngineering at the University of Waterloo. In 2009, he received hisBachelorDegreeinCivilEngineeringformAzadUniversity/Mashhad,Iran.Thereafter, in 2010, he started hisMaster study in the field ofHighwayand Transportation at the University of Malaya, Malaysia. During hismaster’sstudyhehasconductedsomeresearchinevaluatingroadpavementperformance,pavementmaterialsaswellasroadsafety.In2011,hestartedworking as a research assistant in theDepartment of Civil Engineering,UniversityofMalaya.Upongraduationfromthisprogram,hisinterestinemergingandinnovativetechnologiesledhimtopursueaDoctoraldegreein civil engineering with the Centre for Pavement and TransportationTechnology (CPATT).Taher’sPhD research focuses on the developmentofthetechnologyofHighModulusAsphaltMixesinOntarioasapartofaprojectsupportedbytheOntarioMinistryofTransportation(MTO)throughtheHighwayInfrastructureInnovationFundingProgram(HIIFP).
Inhissparetime,Taherenjoysreading,playingsoccer,workingout,travelling,andspendingtimewithfamilyandfriends.
Outreach - GRINCH Colloquium at Laval UniversityThePavement research teams atLavalUniversityandtheEcoledeTechnologySuperieurehaveseveralyearsofcollaborationandformtogetheraresearchgroup called “GRINCH:GroupedeRecherche enIngénierie des Chaussées” or Research Group onPavementEngineering.Thisyear,LavalUniversityhostedtheGrinchcolloquiumonMay26th,2015andinvitedtheCPATTteamtoparticipate.ProfessorHassanBaajrepresentedCPATTinthecolloquiumand gave a presentation on our ongoing researchprojectsandfutureplans.Morethan50participantsfrom private and public sectors attended thisconferencewherestudentsandresearchersfromtheparticipating institutions presented the findings oftheirresearchprojects.Thecolloquiumwasagreatoccasiontostrengthenthetieswithintheresearchteamsandtoidentifyseveralpotentialtopicsforfutureinterdisciplinarycollaborations.
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ContactUsandUpcomingEvents
UniversityofWaterloo200UniversityAvenueW.Waterloo,ONN2L3G1www.civil.uwaterloo.ca/CPATT/
Numbers and Email:
CPATT-Laboratory519-888-4567ext.37731
Dr.SusanTighe,[email protected]
Dr.JeffWest,[email protected]
Dr.HassanBaaj,[email protected]
CPATT Board Members
SusanTighe(Director)UniversityofWaterlooJeffWest(AssociateDirector)UniversityofWaterlooRicoFung(Chair)CementAssociationofCanadaJohnCarrickJr.,McAsphaltIndustriesLtd.SandyBrown,OntarioHotMixProducersAssociationBeccaLane,MinistryofTransportationOntarioMattKaran,FormerStantecConsultingLtd.CarlClayton,StantecConsultingLtd.GaryMacDonald,RegionalMunicipalityofWaterlooMurrayRitchie,TheMurrayGroupLtd.NeilThomson,UniversityofWaterlooRalphHaas,UniversityofWaterlooGerhardKennepohl,UniversityofWaterlooHassanBaaj,UniversityofWaterloo
UpcomingEvents
September14-17,2015-SWIFTWorld’sPremierAirfieldOperationsConference-Montreal,Canada
September27-30,2015-TransportationAssociationofCanadaConferenceandExhibition-PrinceEdwardIsland.
January10-14,2016-TransportationResearchBoard95thAnnualMeeting-Washington,D.C.
June1-4,2016-CSCEAnnualConference-London,Ontario
