by: sathish nagarajan graduate student · 2020-01-06 · heavy duty seal coat by: sathish nagarajan...

Heavy Duty Seal Coat

By: Sathish Nagarajan

Graduate Student

Industry Mentors

Ken Estrada

Mark Collings

Chance Cherry

Seal Coating

Seal coating is a barrier coat between asphalt surfaces and

the destructive elements

A pavement preservation technique

Reason to sealcoat- Asphalt pavement Deterioration

The asphalt binder (glue) that holds

the pavement together begins to

oxidize and weather soon after

installation. Moisture penetrates the

asphalt causing damage and

deterioration to the pavement.

How does it work ? Untreated vs. Treated

Seal coat replenishes the binder that is lost through

weathering and provides a barrier to moisture

intrusion

Also increase pavement texture and surface friction

Seal coat – Step by step

Squeegee Machine

Sealcoat the pavement

Remove barricades the next day

Prepare for sealcoat

Do general cleaning

Barricade driveway

Check weather forecast

Higher Solids = Better filling capability's

Before

Before

After

Peoria AZ 05 2014 Peoria AZ 05 2014

Sealant Comparison

Fog Seal

Single coat

0.08-0.12 gal/sq.yard

Costs less

Life 1 to 2 years

Heavy Duty Seal Coat

Double coat

0.25-0.32 gal/sq.yard

Cost is 30% higher

Life 3 to 5 years

Advantages & Benefits

Seal coat provides an

economical approach to

pavement preservation

Offers increased resistance to

UV radiation, Moisture and

Chemicals

Questions ???