Edgard Hitti
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Transcript of Edgard Hitti
Performance –Graded (PG) BindersPerformance –Graded (PG) Binders
PParamount aramount PPetroleumetroleum CCorporationorporation
14700 Downey Ave14700 Downey Ave
Paramount, CA 90723Paramount, CA 90723
Edgard HittiEdgard HittiDirector of Asphalt Technical Services Director of Asphalt Technical Services
Paramount AsphaltA subsidiary of ALON USA
OverviewOverview How it is madeHow it is made
Then & NowThen & Now
Specifications gradingSpecifications grading
Why, When & How?Why, When & How?
How will it affect you?How will it affect you?
Q & AQ & A
Production Of Modified AsphaltProduction Of Modified Asphalt
H
Bases
Modifier
Grade
S
Bases
Polymer, rubbers, etc…
Production Of Modified AsphaltProduction Of Modified Asphalt
Very delicate Very delicate processprocess
Requires Requires computerized computerized systemsystem
PMA PlantPMA Plant
66
Long Term StorageLong Term Storage
Up to 2 weeksUp to 2 weeks
300-320oF
Avoid aging
& increase viscosity
Prevent
degradation
Neat asphalt
PMA
PG-M, PG-PM, PG-TR
Extended StorageExtended Storage
More than 3 weeksMore than 3 weeks
Neat asphalt:Neat asphalt:– no heatno heat
PMA (PG-PM, PG-TR, PG-M):PMA (PG-PM, PG-TR, PG-M):– No heatNo heat– Polymer has the tendency to over swell & Polymer has the tendency to over swell &
degradedegrade
<300oF
250-300
Formation Of Coked MaterialFormation Of Coked Material
Around heating coilAround heating coil Excessive heat for an extended periodExcessive heat for an extended period Loss in heat efficiencyLoss in heat efficiency Improper maintenanceImproper maintenance
– Inspection on yearly basisInspection on yearly basis
Solution:Solution:– Empty the tank and physically remove the material Empty the tank and physically remove the material
around the coils around the coils
Coked MaterialCoked MaterialHardened asphalt around the heating coils
Coked material
Heating oil
Asphalt
Pipe
Coked MaterialCoked Material
Very hard & brittle materials
Heating Oil LeakageHeating Oil Leakage
Minor leakage can drop viscosity from Minor leakage can drop viscosity from 2000 to 100 poise2000 to 100 poise
Monitor viscosity or heating fluidMonitor viscosity or heating fluid
Solution:Solution:– Material is transferred to another tank and Material is transferred to another tank and
re-blend to bring it back to spec.re-blend to bring it back to spec.
FlushingFlushing
Good practice to flush the tank after TR or Good practice to flush the tank after TR or PM project with HOT neat asphalt.PM project with HOT neat asphalt.– Attention to contaminationAttention to contamination– Tank completely emptyTank completely empty
Truck ContaminationTruck Contamination
Truck must be cleaned before loading Truck must be cleaned before loading different materialsdifferent materials
Some truckers use diesel oil to prevent Some truckers use diesel oil to prevent plugging of the valves plugging of the valves (BAD PRACTICE) (BAD PRACTICE)
Area filled with diesel oil
Penetration Grading System
Viscosity Grading System
Specification Specification SystemsSystems
Superpave PG Grading
System
Other Systems
Penetration SpecificationPenetration Specification
Five grades (original binder):Five grades (original binder): 40 - 5040 - 50 60 - 7060 - 70 85 - 10085 - 100 120 - 150120 - 150 200 - 300200 - 300
Original Binder (AC)
Aged Residue (AR)
Viscosity Viscosity Grading Grading SystemSystem
4050
6070
85100
120150
200300
Penetration Grades
AC 40
AC 20
AC 10
AC 5
AC 2.5
100
50
10
5
Vis
cosi
ty,
60C
(14
0F)
AR 16000
AR 8000
AR 4000
AR 2000
AR 1000
Superpave PG Grading SystemSuperpave PG Grading System
Developed in 1990s during SHRPDeveloped in 1990s during SHRP Fundamental PropertiesFundamental Properties
– Related to Pavement Performance?Related to Pavement Performance?
Binder Contributions to Binder Contributions to – Rutting, Fatigue and Thermal CrackingRutting, Fatigue and Thermal Cracking
Environmental Factors or Climate Environmental Factors or Climate In-Service & Construction TemperaturesIn-Service & Construction Temperatures Short- and Long-Term AgingShort- and Long-Term Aging
Superpave Asphalt Binder Superpave Asphalt Binder SpecificationSpecification
The grading system is based on Climate:In-Service Pavement Temperatures
PG XX - YY
Performance Grade
Average 7-day max pavement temperature
Min pavement temperature
AASHTO and ASTM requirements
And much more!!!
DSR
BBRRTFO
PAV
RV
CalTrans PG-GradesCalTrans PG-Grades
CalTrans Modified PG-GradesCalTrans Modified PG-Grades
PG 58-34PM (Open Grades & Night Paving)PG 58-34PM (Open Grades & Night Paving)
PG64-28PM (working horse for the State)PG64-28PM (working horse for the State)
PG76-22PM (Desert Area, Stiffer binder, higher PG76-22PM (Desert Area, Stiffer binder, higher traffic applications)traffic applications)
Effective Jan 01, 2007 to replace all PBA specsEffective Jan 01, 2007 to replace all PBA specs
ImplementationImplementation
4 unmodified PG-binders “Jan 06”4 unmodified PG-binders “Jan 06” Replace PBA specs with PG-PM “Jan 07”Replace PBA specs with PG-PM “Jan 07” Asphalt Rubber base “PG64-16 & PG58-Asphalt Rubber base “PG64-16 & PG58-
22”22” AMRL certification “Jan 07”AMRL certification “Jan 07” PG-TR Specs (Terminal Blend Specs) Jan PG-TR Specs (Terminal Blend Specs) Jan
0808
PG for rubberized bindersPG for rubberized binders AB 338AB 338
2007: min. 6.0 lb/ mix ton2007: min. 6.0 lb/ mix ton 2010: min. 7.5 lb / mix ton2010: min. 7.5 lb / mix ton 2013: min. 10.5 lb / mix ton2013: min. 10.5 lb / mix ton
AB513AB513 $2 for every 12 lb of crumb rubber = 1 PTE$2 for every 12 lb of crumb rubber = 1 PTE
Calrecycle requirements: Calrecycle requirements: min. 15% crumb tire derived & processed in CAmin. 15% crumb tire derived & processed in CA
PG-PM and PG-TR has been combined PG-PM and PG-TR has been combined under one spec: PG-Munder one spec: PG-M PG58-34M, PG64-28M and PG76-22MPG58-34M, PG64-28M and PG76-22M
PG76-22R – R18 for Chip SealPG76-22R – R18 for Chip Seal
Mix DesignsMix Designs
A change order needed for ongoing projectsA change order needed for ongoing projects– New projects will have PG-MNew projects will have PG-M
Suppliers will include temp/vis curves for Suppliers will include temp/vis curves for compaction and construction temp.compaction and construction temp.
Call your supplier for recommendationsCall your supplier for recommendations
UC Berkley hVS StudyUC Berkley hVS Study
performanceperformance
PG64-28NVTR
PG76-22NVTR
I-40 Report I-40 Report (Caltrans / Asphalt institute)(Caltrans / Asphalt institute)
PMTR-M ProjectsPMTR-M ProjectsDistrict 1 (HWY 101 – Del Norte County)District 1 (HWY 101 – Del Norte County)
PMTR-M ProjectsPMTR-M ProjectsDistrict 2 (hwy 44 – city of redding)District 2 (hwy 44 – city of redding)
PMTR-M ProjectsPMTR-M ProjectsSan Diego CountySan Diego County
Play Video
PMTR-M ProjectsPMTR-M ProjectsSiskiyou CountySiskiyou County
Play Video
TR ProjectsTR ProjectsRiversideRiverside
Questions and AnswersQuestions and Answers
Thank You!Thank You!