Asphalt Binder Types and Uses 1

Types & Uses of Asphalt Materials

Senior/GraduateHMA Course

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BitumenBitumen

Tar(from coal)• road tar• coal tar

Asphalt Binder (from petroleum crude)• asphaltic bitumen• asphaltic binder

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ASPHALTSASPHALTS

• Asphalt Binders

• Cutbacks

• Emulsions

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• Asphalt concrete• Asphalt paving

mix• Asphalt mix• Asphalt

Hot Mix Asphalt Hot Mix Asphalt (HMA)(HMA)

• Bituminous concrete• Bituminous paving

mix• Bituminous mix

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Significant Crude Oil Significant Crude Oil SourcesSources

Domestic• Gulf coast• Mid-continent• Rocky Mountain• West coast• Alaska

Foreign• Mexico• Venezuela• Canada• Middle East

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Asphalt Binder is Generally

Produced in a Refinery

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Basics of Refining Crude OilBasics of Refining Crude Oil

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Asphalt Binders are broken down into 2 components:

• Asphaltenes and resins• OilsBlended to produce asphalt binders of

desired properties

Solvent DeasphaltingSolvent Deasphalting

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Asphalt binder is broken down into 3 components:

• Asphaltenes• Resins• OilBlended to produce asphalt binder of

desired properties

Residuum Oil Residuum Oil Supercritical Extraction Supercritical Extraction

(Rose)(Rose)

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Batch Plant

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Continuous Mix Drum Plant

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Cutback AsphaltsCutback Asphalts

Rapid Curing (RC)Asphalt + NaphthaSurface Treatment

RC - 30RC - 70

RC - 250RC - 800

Medium Curing (MC)Asphalt + Kerosene

Stockpile PatchPrime Coat

MC - 30MC - 70

MC - 250MC - 800

Slow Curing (SC)Asphalt + Oil

SC - 70SC - 250SC - 800

SC - 3000

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30 70 250 800 3000

COMPOSITION OF CUTBACK ASPHALTS

RC = Naphtha; MC = Kerosene SC = Light Oil

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CUTBACKS - USESCUTBACKS - USES• Rapid Curing

– Tack coats– Surface treatments

• Medium curing– Prime coats– Stockpile patching materials– Road Mixing Operations

• Slow curing– Prime Coats– Stockpiling– Road mixing

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EMULSIONS - MANUFACTUREEMULSIONS - MANUFACTURE

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EMULSIONS - USESEMULSIONS - USES• Slow Setting (SS)

– Tack coats, fog seals, dense-graded cold mixes• Medium Setting (MS)

– Open graded cold asphalt-aggregate mixtures• Rapid Setting

– Surface treatments

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QUESTIONS ?