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Issue 15 - Spring 2016CPATT NEWS
Contents:• FeatureFaculty• StudentFeature• FieldFocus• Individual
Highlights• Awardsand
Recognition• Norman
McLeodChair• ContactUs
andUpcomingEvents
Message from the Director
WelcometoourSpring2016additionofCPATTNews!
Wehopeallyourprojectshavebeensuccessfultodateandwishyouallcontinuedsuccessastheconstructionseasonprogresses.
Weweredelightedtocelebrate10yearsofoperationintheFall2015.Inaddition,wesendabigthankyoutoProfessorJeffWestwhoservedastheAssociateDirectorofCPATTfrom2010 to2015.Jeff’s leadershipandassistance inrunningCPATTwasgreatlyappreciatedandhewillstillremainanactivememberinCPATT.WewelcomeProfessorHassanBaajasthenewAssociateDirectorwhoisalreadyaveryactivememberinCPATTandholdstheNormanW.McLeodProfessor inPavementMaterials.The contributionof all our activefacultyandstudentsreallyisattheheartofthesuccessofCPATT.
Thepastdecadehasseenmanyresearchadvancesandachievementsandwearegratefultoallouractivefacultymembersandresearchpartners.Incelebration,wehavedecidedtofeatureoneofouractivecollaborators,theQueenslandPavementCentreattheUniversityoftheSunshineCoast,whichiscurrentlycollaboratingwithCPATTonseveralinitiatives.
Inaddition,inthisnewsletterwehighlightsomeofthevariousprojectsunderwayatCPATT.Also,wehighlightsomeeventsandspecialfeatures.
Shouldyouhaveanyquestionsrelatedtoouractivitiespleasedonothesitatetocontactus.
Sincerely,
SusanL.Tighe,PhD.,P.EngProfessorandNormanW.McLeodProfessorinSustainablePavementEngineeringDirectorofCPATT
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FacultyFeature-UniversityoftheSunshineCoast
In2015ProfessorTighespentaportionofhersabbaticalwiththepavementengineeringteamattheUniversityoftheSunshineCoast,nearBrisbane,Australia.Thesmallbutenthusiasticteamincludes:
• ProfessorMarkPorter,HeadofDiscipline-Engineering• ProfessorJohnYeaman,ConstructionEngineering• AssociateProfessorGregWhite,AirportandPavementEngineering
TheUniversityoftheSunshineCoastinAustralia’sfastergrowingUniversityandin2016celebrateditsthetwentyyearanniversaryofitsfirstlecture.ThePavementEngineeringteammaybesmallbutithasgrandvisions and ambitions. Research activities are broadlydivided into roadpavement and airport pavementstreams, with significant overlap in the areas ofmaterial characterisation and pavement instrumentation.Recentandcurrentundergraduateandpostgraduateprojectsandactivitiesinclude:
• Analysisofdatafromfullin-pavementtemperature,moistureandstraininstruments• Theimpactofcrudeoilandbitumenchangesonasphaltperformance• Comparingnearsurfacestressesandstrainswithfiniteelementandlayeredelasticmodels• Premiumbindersforairportasphaltproduction• Asphaltshearingandshovinginheavyaircraftbrakingzones• Causesoftopdowncrackinginasphaltpavements• ModificationtotheACN-PCNforidentificationofsurfacedistressesinasphaltrunways.
TheUniversityoftheSunshineCoastPavementEngineeringteamwelcomestheopportunitytostrengthentieswiththeUniversityofWaterloointhefutureandmanycollaborationsareon-going.DespitethehugedifferencesbetweenAustraliaandCanadaintermsofclimate,therearemanyremarkablesimilaritiesintermsofdesigninglonglifeinfrastructure.
MarkPorter JohnYeaman GregWhite
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FacultyFeature-GregWhite,USC
Systematic Diagnosis of Factors Leading to CyclicShearCreepofAirportAsphaltSurfacesTworunwaysatthesameAustralianairportwereresurfacedwith50-60mmofasphaltbetweenSeptember2010andJuly2011.TheMarshall-designed14mmnominalsizedasphaltwastypicalofairport-qualityasphaltinAustralia.Apremiumacidmodifiedbinder,locallyknownasM1000,wasused.Approximatelysixmonthsafterconstruction,horizontalshearcreepdeformationswereobserved.Thefailureswereonlyobservedinthebrakingzoneassociatedwithonelandingdirectionandonlyonthesecondofthetworesurfacedrunways.Around60isolatedfailurespresentedovertwotothreeyears,afterwhich,newfailuresceasedtoappear.
Ataroundthetransitionfromonerunwaytothesecond,thefineaggregate(dust)sourcehadchangedfromonequarrytoanother.TheseconddustcontainedpredominantlyHisingeriteclayminerals.Hisingeriteisa rarely encounteredmember of theSmectite-groupof clays andpossesses physical properties indicativeof potentially adverse effect on asphalt stability and shear stress resistance. The original dust containedNontronite,amorecommonandlessconcerningmemberoftheSmectite-group.Subsequentinvestigationdeterminedthatthebitumen(M1000)feedstock(crudeoilsourceblend)alsochangedataroundthetransitionbetweenthetworunways.Retainedbitumensamplesfrombeforeandafterthefeedstockchangeindicatedsignificantly different bitumen properties. It followed that the two runways contained two substantiallydifferentmastics,within an otherwise common coarse aggregate skeleton. The aim of this investigationwastodeterminethesingle,orcombination,ofasphaltconstituentsthatledtothesignificantdifferenceinrunwaysurfaceresponse tohighshearstressconditions. Themastic(bitumenfeedstockanddustsource)wasconcentratedon.However,significanteffortwasalsomadetoexcludeotherpotentiallycontributingandconfoundingfactors.
The initial phases of the systematicinvestigation confirmed the change inmastic was responsible for the observeddifference in surface performance. First,aircraft-inducedsurfacelayershearstresseswerecalculatedforthethreeregularlyusedlandingdirectionsacrossthetworunways.As a result, differential aircraft operationwasexcludedasacontributingfactor.Thefigure to the right shows the phases ofinvestigationleadingtoachangeinbitumenpropertiesasarootcauseofdistress.
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FacultyFeature-GregWhite-Cont’d
Second,surfacelayerinterfaceshearresistancewasmeasuredbydirectshearandcyclicsheartestingofcoresrecoveredfromthetworunwaysurfaces.Thedirectsheartestingexcludeddifferentialinterfaceconstructionasapotentiallycontributingfactor.Thedirectshearandcyclicsheartestresultswerecombinedtodemonstratethattheasphaltonthefirstrunwayhadsignificantlyhigherresistancetocyclicshearstressthanthesecondrunway’sasphalt.Thisfocusedtheinvestigationtowardsthetwoasphaltmaterialsandtheirconstituents.Third, a range of non-specification testing was performed on the various retained and representativeconstituentmaterials. Thisexcludedthecoarseaggregateandhydratedlime(addedfiller)ascontributingfactors.ThechangesinM1000feedstockanddustsourcewereidentifiedastheremainingpossiblefactors
leadingtothereducedshearstress resistance observedinthesurfaceofthesecondrunway. The figure to theleft shows the shear stresswith depth for (a) nonbraking aircraft and (b)extremebrakingaircraft.
Finally, performance-based repeated shear stresstestingofmasticandbindersampleswasusedtoisolate
the relative impact of the bitumen and dust changes on mastic, and therefore asphalt, shear resistance.Mastictestingshowedthatthechangeindustsource,andassociatedincorporationofHisingeriteclay,didnotadverselyaffecttheasphaltonthesecondrunway.TheimpactofthefeedstockchangeontheM1000resistance to repeated shear stresswas estimated from testing of retained bitumen samples. TheM1000bitumenincorporatedinthesecondrunway’sasphaltshowedlowerresistancetodeformationunderrepeated
shearstress,aswellashighersensitivitytohighstresslevels.
Itwasconcludedthatthehigherstresssensitivityandlowershearstressresistance associatedwith the bitumen used on the second runwayresultedinanasphaltsurfacewithreducedresistancetocyclicshearcreep. Isolatedzonesofpermanenthorizontaldeformationresultedunder the high shear stresses associated with typical commercialaircraft braking. The observed self-correction of the surface wasconsistent withmeasured in-storage hardening of retained bitumensamples.Thelackofresistancetoshearcreepofthesecondrunwaysurface was determined to be an example of medium-term asphalt
tenderness, resulting from the change inM1000 feedstock.Thefigure to the left showsa typical (oneofaround60)sheardistressesintheaircraftbrakingone.
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StudentFeature-QingfanLiu
Meet Qingfan Liu, PhD. P.EngAfterhisPhDandMSc.Degrees from thePavementGroupat theUniversity ofManitoba,Qingfan joinedCPATT as a post-doctoralfellow,inthedepartmentofCivilandEnvironmentalEngineeringattheUniversityofWaterloounderthesupervisionofDr.SusanTighe.Qingfan was able to receive prestigious scholarships during thecourseofhisstudyandresearch includingNSERC,TAC,CAPTG,andUniversityofManitobaGraduateFellowship.Hehaspublishedpapers in the Transportation Research Record, the InternationalJournalofPavementEngineering,andtheCanadianJournalofCivilEngineering.HehasalsobeenatechnicalreviewerforTRB,CJCE,JournalofTransportationEngineering,andtheCanadianInstituteofTransportationEngineers.
Inhispersonaltime,Qingfanisaavidgardenerandshareshisflowersandvegetableswithhisneighbours.
Whatdoesasafe,smarter,quieter,andsustainablepavementmeantothesociety?Whiledifferentpavementprofessionalmayhavedifferentopinionsorapproaches,Qingfanhasbeenworkingon thisfieldformorethanadecadeandhewillbecontinuingworkingonitashischosencareer.Pavementsurfacecharacteristicsatthemacro-textureandmicro-texturescalearecriticaltovehiclestability,traction,friction,androadnoise.Unfortunately,thehighcostandcomplexityoffriction/texturetestingequipment,togetherwithlegalliabilityissueshavemeantthattransportationdepartmentsconductfewandlimitedfrictionandnoisetestingandthatdeficientpavementsurfacescouldbeinserviceformanyyearswithoutbeinginspected.Inanefforttoaddresstheseissues,Qingfanconductednumerousteststoinvestigatepavementtextureinathree-dimensional(3D)mannerbyusingaline-laserscannerofwhichthesamplingintervalandaccuracyoftexturemeasurementisbetterthan0.05mmtocoverpartlybothmacro-textureandmicro-texture.Theadvantageoftheline-laserscanneristhatpavementsurfacetextureisrecoveredinto3Dsurfacetextureheightmapsandprovidingmorerealisticassessmentofsurfacetexturethantwo-dimensionalprofilemethods.Hisfieldtestsandanalysiscovervarioustypesofpavement:• Collectedandanalyzedtexturedatafor28typesofasphaltandconcretepavementatMnROADfacilities,
MinnesotaDepartmentofTransportation,USA.• Evaluatedpavementtexture,friction,andnoisefor14typesofnewconstructedrigidpavementsectionsat
theSouthExtensionoftheI-355North-SouthTollwaybetween!-55andI-80Joliet,Illinois,USA.• Investigatedtheimpactsofreclaimedasphaltpavement(RAP)andrecycledasphaltshingles(RAS)on
pavementperformanceforManitobahighwaysandlocalstreetsinWinnipeg.• AssessmentthetextureandfrictionvaluesfortherunwaysoftheJamesArmstrongRichardsonInternational
Airport,Winnipeg.• Morethan100sensorswereinstalledintoManitobahighwaystomonitorroadwayresponseundervarious
loadingconditionsincludingIn-situmoisture,strain,temperature,anddeflection.• Conductednon-destructiveroadtestse.g.fallingweightdeflectometer,tirefootpringpressurecontroland
measuresystems.
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StudentFeature-PeterMikhailenko
Meet Peter MikhailenkoPeter Mikhailenko is a Research Associate inCPATT, having started in January 2016. Born inKiev, Ukraine SSR, he immigrated to Toronto,Canadaatayoungagewithhisfamily.Peteroweshisveryexistencetoresearch,ashisopticalengineerparentsmetduringaprojectonlaser-optics.
Peter completed his B.Eng andMASc degrees atRyersonUniversityinTorontoinCivilEngineeringandhisPhD inCivilEngineering at theToulouseIIIPaulSabatierinFrance.Healsohasexperiencein the concrete industry, notably with St Mary’s
Cement.HestartedhisinterestinbuildingmaterialsbyperformingresearchoncementitiousmaterialsatRyerson.Duringhisundergraduateperiod,heworkedonzero-slumpconcrete.Heworkedonself-healingconcreteandcementpastewithhighlevelsofmetakaolinforhisMaster’sDegree.
Peter’sworkonbituminousmaterialsbeganduringhisPhDprojectinToulouse,France.Theprojectfocusedonthetransformationofbiologicalwasteintoconstructionmaterials-includinganasphaltreleaseagentand rejuvenating agent - the development of which comprised Peter’s PhD project. The collaborativeprojectinvolvedseveraluniversityresearchlaboratories,R&DcompaniesalongwithconstructionmaterialproducersandusersinFrance.Peter’srolewastoaboveall,developthetestmethodsthatwouldallowforthecharacterization,theperformanceandsafetyoftheseagents,followedbytheirtestingandevaluation.ThisresultedinPeterdevelopingthemostcomprehensiveprogramforevaluating asphalt release agents that exist today.Healsoworkedonmicroscopictechniquesforevaluatingbitumenagingandrejuvenation;includingFTIRMicroscopyandSEM.PeterdefendedhisPhDinJuly2015.
PeterhaspublishedhisPhDworkinjournalarticlesandatconferences.Havingbeenexposedtoresearchinbituminousmaterials,PetercamebackacrosstheAtlantictocontinuethisresearchpathwiththeCPATTteam.Peter’sroleinvolvesworkonresearchprojectsinasphaltmaterialsaswellasaidingfellowresearcherswithinCPATT.Peter’scurrentandfuture projects involve binder extraction and recovery, asphalt aging,pavementcracking,RAPblending,asphaltself-healingandtheobservationofasphaltwithESEM(picturedabove),ensuringthathewillbeabusyperson.PeterisveryexcitedtobeapartoftheCPATTteam.
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FieldWorkFocus-U-FillProject
RecyclingConcreteAggregate(RCA)andReclaimedAsphaltPavement (RAP)areconstructionmaterialsproduced from existing structures which havereachedtheendoftheirservicelives.RCAistypicallyproduced by crushing concrete which has beenbrokenupwhileRAPistypicallyproducedbycold-millingasphaltpavement.RAPisfrequentlyrecycledintonewpavementstructure,oftenbeingreplacedonthesameroadwaysfromwhichitwasmilled.RCAismoreoftenusedasareplacementforvirginmaterialingranularfillapplications,buthasbeenfoundtobeusableinnewconcreteapplicationsaswell.
RCA generally has a high content of fine materialdue to the crushing operation.This finematerial isgenerallymadeupofthefineaggregateandcementmortarof theoriginal concretematerial.When it isincluded in new concrete, the fine RCA materialsgreatlyincreasethewaterdemandandcanreducethematerial’sworkabilityandcompressivestrength.Forthese reasons, this fine fraction is often reduced orremovedpriortoincludingRCA.
Unshrinkablefill(u-fill)isaconcretemixturewhichis characterized by its highly flowable nature andits low compressive strength. In order to achievethesecharacteristics,itisdesignedwithahighwatercontentandlowcementcontent.U-fullisoftenusedtofillaroundburiedutilitylinesasitcanflowbeneaththelinesandbeeasilyexcavatedwhenthelinesneedtobereachedinthefuture.
Because of u-fill’s low requirement for strengthand already high water content, it could representanpotentialapplicationwhereintheuseofrecycledmaterialsisnotdetrimental.
The City ofToronto is interested in determining ifrecycled materials can be effectively used in u-fillapplications. Specifically, they are interested in
recycled materials which include the fine fraction,unlike some previous applications. If this materialisusable inu-fill, thenasignificantprocessingstepcan be removedmaking recycledmaterials amoreattractive alternative tovirginmaterials.Dependingon the results of the study, they may modify theirmunicipal construction specifications to allow forrecycledmaterial’s inclusion in u-fill.TheCity puttogether a research team including the Centre forPavementandTransportationTechnology,consultantsfromLVM,andtheMillerGrouptoinvestigatethisquestion.
Theresearchprogramhasincludedseveraliterationsincludingtwofieldtrialsandseverallaboratorytrials.CPATThasundertaken these lab trials investigatingthe effect of recycled materials on workability,compressive strength, bleed water amount andbleedingtime,andbearingstrength.
Bearing testing of u-fill
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FieldWorkFocus-U-FillProjectCont’d
Therecycledmaterialsthemselvesweretestedfortheirgradation,absorption,density,specificgravity,andfreeze/thawdurability.
The recycledmaterials consisted of a combinationofRCAandRAP,whichwas generally referred to asrecycledaggregate(RA).Therelativeamountofeachwasinitiallyvariedbetween100%RCA/0%RAP,70%RCA/30%RAP,and50%RCA/50%RAP.Inlateriterations,the50/50blendwasusedtoreplace0%,25%,50%,and75%ofthevirgingranularmaterial.
TheRAwasfoundtogreatlyaffectthebleedingrateofthematerial,whichissignificantforamateriallikeu-fillwithhighwatercontent.Thisalsoaffectedthebearingcapacityofthematerialsasasignificantamountofwaterremainedatthematerial’ssurfacelayerforconsiderablylongerperiodsoftime.
Fieldtrialswereundertakenwheretrencheswereexcavatedandsubsequentlyfilledwithu-fill.Thesetrencheswere allowed to sit for four hours andwere then paved over.The pavementwas then loaded to test formaterial’sbearingcapacity.
Theresultsofthelabandfieldtestsindicatethatu-fillproducedwithupto25%RAcanperformsimilarlytou-fillproducedwith100%virginaggregate.Beyondthislevel,thebearingcapacityofthematerialattheageoffourhourswasnotsufficienttosupporttheconstructionloadingthatwouldberequiredinthefield.
TheCityofTorontoiscurrentlylookingintoincorporatingthesefindingsintoitsconstructionspecifications.
Pleaseseethenextpageformoreimagesofthisproject.
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FieldWorkFocus-U-FillProjectCont’d
BleedratesforvaryingRAlevelu-fill
Bleedingandconditioninglaboratorysamples
Placementofu-fillduringfieldtrials
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Highlights-FriendoftheFacultyAwardMillerMcAsphaltGroup2015recipients
TheFacultyofEngineeringestablishedtheFriendoftheFacultyawardin2005toprovidetangiblerecognitiontoanindividual,company,organization,group,orfoundationfortheirsupportoftheFacultyofEngineering.The2015awardwaspresented toTheMillerMcAsphaltGroup.Theywere recognized for theirongoingcommitmentandgeneroussupporttoWaterlooEngineeringthatwasinstrumentalinthelaunchoftheCentreforPavementandTransportationTechnologyandtheNormanW.McLeodChair inSustainablePavementEngineering.
TheMillerMcAsphaltGrouppartnershipwiththeUniversityofWaterloodatesbacktothe1970s.ItwasJohnCarrickSr.andLeoMcArthurthatbeganthepartnershipwiththeUniversityofWaterlooCivilEngineeringdepartmentback in theearly1970s.At this time,Dr.NormanMcLeodwas theVice-PresidentofAsphaltTechnologyatMcAsphaltandalsotaughtthe4thyearpavementdesigncoursefornearly20years.
Itwasinthelate1980sthattheNormanMcLeodEngineeringProfessorshipwasestablishedwhichDr.RalphHaasheldformanyyears.FromtherelationshipbetweenDr.Haas,JohnCarrickSr,LeoMcArthur,andDr.McLeodcamethecreationoftheCentreforPavementandTransportationTechnology.TheNormanMcLeodProfessorshiphasnowgrownintoafullyfundedendowedChairwith16publicprivatepartnershipswherebyDr.SusanTigheholdstheseniorChairandDr.HassanBaajholdsthejuniorChair.
MillerMcAsphalthavecolloboratedwithCPATTonmanyresearchprojectsandcontinuestodosotodayandarecommitted tocontinued researchand the trainingofhighlyqualifiedpeoplewhichhave includedmanyengineersworkingforthemthroughtheUWco-opprogramandhavehiredmanystudentsaftertheirgraduation.
CongratulationstotheMiller-McAsphaltGroup.Sadly,wealsoacknowledgethepassingofLeoMcArthurinJanuary2016.WegreatlyappreciateallofLeo’scontributionsandwewillmisshim.
Pictured at ceremony (left to right): John Carrick Jr., Blair McArthur, and kelly
Carrick
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Highlights-GraduatePosterSymposium
OnFridayOctober30th,weheldthe5thannualGraduateStudentPosterSymposiumintheE5SedraStudentDesignCentre.Therewereatotalof16studentposters.Industrymembers,faculty,staffandstudentsattendedthiseventandwereabletoprovidegreatfeedbacktothestudents.
Congratulationstothethreewinnersforthebestpostersandinterestingresearch.BenDowforhisresearchondevelopmentandstudyofUHPCasaclosurestripmaterialinprefabricatedbridgeapplications,MagdyShaheenforhisresearchontheeffectsofhighfrictionaggregateandPGplusonsurfacehotasphaltmixturesrutting:laboratoryandimagebasedcharacteristics,andColinVanNiejenhuisforhisresearchonstainlesssteelreinforcingalloyscorrosion.
Thankyoutoallthestudentsthatparticipatedinthisevent,theindustry,facultyandstaffthatattendedandour three judges:AntonKucharek (McAsphalt IndustriesLtd.),DavidRhead (Ministry ofTransportationOntario),andMickPrieur(ConcreteOntario).
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AwardsandRecognition
AwardsandRecognition2015 Irene Marguerite McLeod Award - Zaid Alyami
2015/2016 Ontario Graduate Scholarship - Dan Pickel-Awardedforexcellenceinthegraduateprogram
2015/2016 Ontario Graduate Scholarship - Sina Varamini-Awardedforexcellenceinthegraduateprogram
2016 Sze Memorial Award - Dan Pickel-Awardedforresearchinthefieldofexperimentalstressanalysis.
NewBaby
CongratulationstoAleliOsorio,formerCPATTPhDStudentandherhusbandPanchoonthearrivaloftheirbeautifulbabygirl,JasminEspinosaOsorio.ShewasbornonJune14,2015inChile.
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NormanW.McLeodChairinSustainablePavementEngineering
New MembersShenglinWangstartedhisPh.D.inSeptember2015attheCentreforPavementand Transportation Technology under the supervision of Prof. H. Baaj. HeobtainedhisBachelor’sdegreeinCivilEngineeringfromHefeiUniversityofTechnology(inChina)at2011,andMaster’sDegreeofGeotechnicalEngineeringfromLanzhouUniversity(inChina)at2015.Shenglin’sresearchtopicfocuseson theuseofHydraulicRoadBinder (HRB) for subgradestabilizationundereffectsoffreeze-thawcycles.Duringhissparetime,Shenglinenjoysreading,playingsoccer,basketball,Ping-pongandspendingtimewithfamilyandfriends.ShenglinisarecipientoftheChinaScholarshipCouncil(CSC)ScholarshipinadditiontoseveralotherdistinctionsduringhisstudiesinChina.
YasharAzimi startedhisPh.D inSeptember2015atCPATTunderthe supervision of Prof. H. Baaj. Yashar received his Bachelor’sandMaster’s degrees in 2004 and 2008, respectively from IsfahanUniversityoftechnology(IUT)andUniversityofTehran,Iran.Hehassevenyearsofprofessionalresearchexperienceinthefieldofasphaltmaterials including production, modification, characterization andapplication.Thefocusofhisresearchinvolvestheanalysisandcharacterizationofagingprocess inasphaltbinderandaccelerated laboratoryagingmethods to predict the aging behaviour of asphalt pavements. HisresearchprojectissupportedbytheOntarioMinistryofTransportation(MTO) through the Highway Infrastructure Innovation FundingProgram(HIIFP).
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NormanW.McLeodChairinSustainablePavementEngineering
Norman W. McLeod Advisory BoardSusanTighe(NormanW.McLeodProfessor),UniversityofWaterlooHassanBaaj(NormanW.McLeodAssociateProfessor),UniversityofWaterlooAmirHalim(BoardChair),StantecConsultingLimitedBruceArmstrong,CanadianAsphaltIndustriesInc.LarryWilson,CapitalPavingInc.JohnPontarollo,CRHCanadaMohammedAhmed,DBAEngineeringLtd.MichaelMacKay-EnGlobeLudomirUzarowski-GolderAssociatesLtd.JohnCarrickJr.,McAsphaltIndustriesLimitedBlairMcArthur,MillerPavingLimitedBeccaLane,MinistryofTransportationOntarioJamesSmith,OntarioGoodRoadsAssociationSandyBrown,OntarioHotMixProducersAssociationMickPrieur,ConcreteOntarioTedArscott,Roto-MillInc.JohnEmery,ShilohCanConstructLtd.MalcolmMatheson,SteedandEvansLimited
FarewellAfteroneyearspentattheCentreofPavementandTransportationTechnologyasResearchAssociate,Dr.PrabirDashasaccepted,lastDecember,aninterestingjobofferasPavementSpecialistwithSNC-LavalininVaughan,Ontario.ThemanagementandthemembersofCPATTwouldliketothankPrabirforhisgreateffortsduringthelastyearandforhisverypreciouscontributionstoourresearchprojects.Wealsowishhimgreatsuccessinhisnewcareerandwishtokeepstrongtieswithhiminthefutureashisuniqueexpertiseandknowledgewouldcertainlybevaluable indifferent researchprojects.Onbehalfof theDirectorandthemembersofCPATT,Prof.BaajpresentedtoPrabirasmallgiftasasouvenirfromhiscolleaguesduringtheOHMPA’sannualseminarinDecember2015.
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ContactUsandUpcomingEvents
UniversityofWaterloo200UniversityAvenueW.Waterloo,ONN2L3G1www.civil.uwaterloo.ca/CPATT/
Numbers and Email:
Dr.SusanTighe,[email protected]
Dr.HassanBaaj,[email protected]
CPATT-Laboratory519-888-4567ext.37731
CPATT Board Members
SusanTighe(Director)UniversityofWaterlooHassanBaaj(AssociateDirector)UniversityofWaterlooRicoFung(Chair)CementAssociationofCanadaTonyKucharek,McAsphaltIndustriesLtd.SandyBrown,OntarioHotMixProducersAssociationBeccaLane,MinistryofTransportationOntarioMattKaran,FormerStantecConsultingLtd.AmirHalim,StantecConsultingLtd.GaryMacDonald,RegionalMunicipalityofWaterlooMurrayRitchie,TheMillerGroupLtd.NeilThomson,UniversityofWaterlooRalphHaas,UniversityofWaterloo
UpcomingEvents
June1-4,2016-CSCEAnnualConference-London,Ontario
September19-22,2016-SWIFTWorld’sPremierAirfieldOperationsConference-Minneapolis-St.Paul
September25-28,2016-TransportationAssociationofCanadaConferenceandExhibition-Toronto,ON
November13-16,2016-CanadianTechnicalAsphaltAssociation-Banff,AB