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Process, Critical Factors, Benefits & Results of FOAMED ASPHALT PAVING A publicatio n of

Wolf Paving Foam Asphalt Injection Paving Technique

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Page 1: Wolf Paving Foam Asphalt Injection Paving Technique

Process, Critical Factors, Benefits & Results of

FOAMED ASPHALT PAVING

A publication of

Page 2: Wolf Paving Foam Asphalt Injection Paving Technique

Foam asphalt injection is a technique that while used throughout Europe, has not been widely used in the United States. The process refers to liquid asphalt oil that is foamed into the form of bubbles and used to rehabilitate pavement as a stabilization agent.

By injecting cold water together with the superheated hot asphalt, the water temperature rises and becomes steam. When the asphalt and steam are injected into ambient air, the asphalt temporarily expands into bubbles which greatly increases the surface area.

In partnership with Tri-County Paving, Wolf Paving completed the first foam asphalt injection project in Waukesha County.

Waukesha Co. Road Program New Berlin, WI

Page 3: Wolf Paving Foam Asphalt Injection Paving Technique

Want to steam-roll ahead? Here’s what we’re going to cover.

DETAILS & PROCESS STEPS4 … Pulverization5 … Shaping6 … Mixing7 … Compaction8 … Details

CRITICAL FACTORS11 … EnvironmentalWater, Temperature, Transportation

BENEFITS & RESULTS12 … Foamed vs. Traditional 13 … Results14. … About Wolf Paving

Page 4: Wolf Paving Foam Asphalt Injection Paving Technique

Steps To Foam Asphalt Stabilization

Pulverization Of The Existing Road Surface1

Page 5: Wolf Paving Foam Asphalt Injection Paving Technique

Steps To Foam Asphalt Stabilization

Shaping the Surface to Near Final Grade2

Page 6: Wolf Paving Foam Asphalt Injection Paving Technique

Steps To Foam Asphalt Stabilization

Mixing and Injection of Foamed Asphalt Cement3

Page 7: Wolf Paving Foam Asphalt Injection Paving Technique

Steps To Foam Asphalt Stabilization

Compaction to Final Grade4

Page 8: Wolf Paving Foam Asphalt Injection Paving Technique

The foamed asphalt process aligns with

the forceful expansion of

asphalt cement.

The foamed asphalt process aligns with

the forceful expansion of

asphalt cement.

Page 9: Wolf Paving Foam Asphalt Injection Paving Technique

Hot reaction is similar to adding water to hot oil in a traditional paving process. In a foamed process, the

reaction is controlled.

Page 10: Wolf Paving Foam Asphalt Injection Paving Technique

After the mixing process, a padfoot

roller is used for initial compaction,

a rubber tired roller is used as the

breakdown roller, followed by a

steel drum roller as the finish

roller.

Page 11: Wolf Paving Foam Asphalt Injection Paving Technique

CRITICAL FACTORS

Weather & Site Conditions Too dry = hinders foaming process Too wet = foam clings to itself rather than aggregates in the pulverized base

Quantity of WaterA substantial amount of water is needed during the injection and final grading process.

TransportationTransportation for water and materials as well as the equipment train throughout the project require significant space – which works for roadways but poses a challenge for parking lots

Temperature of Oi lThe ideal temperature for the hot oil is 340 degrees. Hotter oil may coke-up or ash slightly. Cooler oil hinders the production of foam.

Page 12: Wolf Paving Foam Asphalt Injection Paving Technique

BENEFITS

Roads open to traffic faster.

Roads open to traffic faster.

Deeper road stabilization

(up to 14 inches)

Deeper road stabilization

(up to 14 inches)

Foamed Asphalt vs. Traditional Techniques

Material can be stockpiled for a longer period of

time.

Material can be stockpiled for a longer period of

time.

Page 13: Wolf Paving Foam Asphalt Injection Paving Technique

A cost effective solution to strengthen road base.

Page 14: Wolf Paving Foam Asphalt Injection Paving Technique

ABOUT Wolf Paving is a third-generation family-owned business with various locations throughout South East Wisconsin. By controlling the raw ingredients, Wolf Paving can produce any type of asphalt mix to handle unique challenges — whether it’s steep hills where cracking can be a problem, or a flat driveway, Wolf Paving builds asphalt solutions designed to look better and last longer.

Page 15: Wolf Paving Foam Asphalt Injection Paving Technique

With a long professional history, the experts at Wolf Paving are experienced and trained to handle virtually any paving project of any size, whether it is residential, commercial or municipal. We meet all your asphalt needs from driveways to highways.