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

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PMTR-M ProjectsPMTR-M ProjectsSiskiyou CountySiskiyou County

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TR ProjectsTR ProjectsRiversideRiverside

www.ParamountAsphalt.com

Paramount Asphalt

Questions and AnswersQuestions and Answers

Thank You!Thank You!