Asphalt Binder Types and Uses 1

Types & Uses of Asphalt Materials

HMA Surface

Asphalt Binder Types and Uses 2

+

HMA (Hot Mix Asphalt)

Asphalt Binder Types and Uses 3

Bituminous MaterialsBituminous Materials

Asphalt Tar

AsphaltCement

EmulsionCutback

(from petroleum crude)(from coal)

Asphalt Binder Types and Uses 4

Trinidad Lake AsphaltTrinidad Lake Asphalt

Asphalt Binder Types and Uses 5

Asphalt Binder is Generally

Produced in a Refinery

MEDIUM DISTILLATEFIELD STORAGE

PUMPINGSTATION

LIGHT DISTILLATE

HEAVY DISTILLATE

PROCESSUNIT

ASPHALTCEMENTS

FOR PROCESSING INTOEMULSIFIED ANDCUTBACK ASPHALTS

STILL

AIR

AIRBLOWNASPHALT

STORAGE

TOWERDISTILLATIONREFINERY

RESIDUUM

OR

GAS

PETROLEUM

SAND AND WATER

CONDENSERS AND

COOLERS

TUBEHEATER

Source of Asphalt CementOil Well (Gasolin

e)

(Kerosene)

(Diesel Oil)

Asphalt Binder Types and Uses 7

General Asphalt Binder PropertiesGeneral Asphalt Binder Properties

• Adheres well to most rock

• Waterproof

• Fairly durable

• Resistant to reaction with most

acids, alkalis, and salts

• Temperature sensitive

Asphalt Binder Types and Uses 8

Asphalt ComponentsAsphalt binder is broken down into 3 components:

• Asphaltenes– Dark brown friable solids– Control viscosity and adhesive properties

• Resins– Dark solid or semi-solid– Greatly affected by temp.– Disperse the asphaltenes

• Oils– Colorless or white liquids– Oxidize and harden into asphaltenes and resin molecules

* These three components are Blended to produce asphalt binder of desired properties

Asphalt Binder Types and Uses 9

Asphalt Types Used in PavementAsphalt Types Used in Pavement

• Asphalt cement (asphalt binder)Used for HMA, patching

• Asphalt emulsion (residue + water + emulsifying agent)

Used for cold mix & maintenance applications

• Asphalt cutback (residue + solvent)

Used for cold mix & maintenance applications

Asphalt Binder Types and Uses 10

• Asphalt concrete• Asphalt paving

mix• Asphalt mix• Asphalt

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

• Bituminous concrete• Bituminous paving

mix• Bituminous mix

HMA = Asphalt concrete = binder + aggregate

Used mainly for hot mix pavement surfacing

Asphalt Binder Types and Uses 11

Asphalt Binder Types and Uses 12

Asphalt Binder Types and Uses 13

Asphalt Binder Types and Uses 14

Asphalt Binder Types and Uses 15

Cutback AsphaltsCutback Asphalts

Rapid Curing (RC)Asphalt + NaphthaSurface Treatment

RC - 30RC - 70RC - 250RC - 800

Medium Curing (MC)Asphalt + Kerosene

Stockpile PatchPrime Coat

MC - 30MC - 70MC - 250MC - 800

Slow Curing (SC)Asphalt + Oil

SC - 70SC - 250SC - 800

SC - 3000

Asphalt Binder Types and Uses 16

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

Asphalt Binder Types and Uses 17

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

Asphalt Binder Types and Uses 18

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