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Advanced Methods to Identify AsphaltPavement Delamination--R06DMichael Heitzman, PE, PhDAsst. Director, NCATR06D Subject Matter ExpertNESMEA, Hartford, CTOctober 18, 2017
What is SHRP2? The Second Strategic Highway ResearchProgram (SHRP2): a large scale researchprogram designed to make significant advancesin some of the most challenging areas in thehighway industry 9-year, 232 million research program TRB: managed over 100 research projects,involving more than 300 research contractors Implementation budget of just over 170 million2
Quick SHRP2 Overview SHRP2 Solutions – 63 products Solution Development – processes, software, testing procedures,and specifications Field Testing – refined in the field Implementation – 430transportation projects; adopt asstandard practice SHRP2 Education Connection –connecting next-generationprofessionals with next-generationinnovations
Focus AreasSafety: fostering safer driving through analysis of driver,roadway, and vehicle factors in crashes, near crashes, andordinary drivingReliability: reducing congestion and creating more predictabletravel times through better operationsCapacity: planning and designing a highway system that offersminimum disruption and meets the environmental andeconomic needs of the communityRenewal: rapid maintenance and repair of the deterioratinginfrastructure using already-available resources, innovations,and technologies
SHRP2 ImplementationAssistance Program Designed to help State DOTs, MPOs, local agencies, andother interested organizations deploy SHRP2 Solutions.12
SHRP2 Implementation:INNOVATE.IMPLEMENT.IMPROVE. 6
SHRP2 Implementation:INNOVATE.IMPLEMENT.IMPROVE. 7
Advanced Methods to Identify PavementDelamination (R06D)Challenge Asphalt is typically laid in multiple layers ofthickness. If those layers don’t bond together,pavement problems begin to show at the surface Delamination between asphalt layers causessurface distresses like cracking and tearing Pavement performance drastically drops, creatingsafety and cost issuesSolution Technology that detect delamination under thesurface of pavement before it becomes a largerissue. Measure at reasonable traveling speed Cover full-lane width 8
R06D Test Sections at NCATTest TrackSection 1 Section 2 Section 3 Section 4 Section 5 Section 6 Section 7 Section 8 Section 9 Section 10Top2-inch liftFullbondFullbondFullbondBottom3-inch liftExistingsurfacePartialpartialNo bond No bond stripping Full bondnobondFull ialStripping No bond No bondHMAHMAHMA 9
R06D TechnologySolutions Ground Penetrating Radar(GPR) antenna array withfrequency sweep Impact echo (IE) andseismic analysis of surfacewaves (SASW) rollingwheel scanning system 10
GPR TechnologyAdvantagesLimitations Can be used at highwayspeeds Cannot distinguishdelamination where thebond of the asphalt lifts isweak or missing Covers large areas Can fine other subsurfacefeatures (utilities) Can be used in live traffic Must have moderatechange in material with airor water present 11
GPR 12
GPR at NCAT Test Track 13
Project Length Analysis – Single Pass 14
GPR on Florida DOT Research LaneLane 5 - depth slice at 1.5”X 21 ftX 171 ftTemperature profile map 15
IE & SASW TechnologyAdvantagesLimitations Can distinguish debonding(delamination) Requires a lane closure Covers large areascompared to point testing Can find concretedelamination and cracking Cannot be used at highwayspeed Technology works best onstiff materials 16
IE & SASW 17
IE / SASW at NCAT Test TrackIE ReportSASW Report 18
Real-time IE Output During Test 19
Real-time IE Output During Test 20
Real-time IE Output During Test 21
R06D Technology ComparisonBenefits GPR with frequency sweep antenna arrayØ Can identify variations in the pavement, and provide a relative degree ofseverity.Ø Operates at reasonable speed and up to full-lane width in a single pass. IE/SASW scannerØ Can identify variations in the pavement; isolate the depth of discontinuity.Ø Can identify debonding between asphalt layers Both TechnologiesØ Excellent forensic tool for project level analysisØ Multi-functional NDT (pavement, bridge decks, etc ) 22
Implementation Assistance ProgramStatesCaliforniaFloridaKentuckyRound 7MinnesotaNew MexicoTexas 23
IAP State ActivitiesMounting the GPR Antenna 24
IAP State ActivitiesCalibrating the Antenna 25
IAP State ActivitiesAutomated Data Analysis 26
What’s Next for R06DThe FutureProduct demand will drive software development to make dataanalysis more efficient and effective. Real-time display detail Automated signal identification in distressed areas 27
For More Information on R06DContacts:Additional Resources:Kate KurganAASHTO Product Leadkkurgan@aashto.orgGoSHRP2Website:Steve CooperFHWA Product Leadstephen.j.cooper@dot.govR06D ProductPagefhwa.dot.gov/GoSHRP2AASHTO SHRP2 http://shrp2.transportation.orgWebsite:Coming soonMike HeitzmanSubject Matter Expertmah0016@auburn.edu 28
involving more than 300 research contractors . connecting next-generation professionals with next-generation innovations. Focus Areas . FHWA Product Lead stephen.j.cooper@dot.gov Mike Heitzman Subject Matter Expert mah0016@auburn.edu GoSHRP2 Website: fhwa.dot.gov/GoSHRP2 AASHTO SHRP2
