The Road to Decarbonization: How Asphalt is Affecting the Planet
The following content is sponsored by Northstar Clean Technologies
The Road to Decarbonization: How Asphalt is Affecting the Planet
Asphalt, also known as bitumen, has various applications in the modern economy, with annual demand reaching 110 million tons globally.
Until the 20th century, natural asphalt made from decomposed plants accounted for the majority of asphalt production. Today, most asphalt is refined from crude oil.
This graphic, sponsored by Northstar Clean Technologies, shows how new technologies to reuse and recycle asphalt can help protect the environment.
The Impact of Climate Change
Pollution from vehicles is expected to decline as electric vehicles replace internal combustion engines.
But pollution from asphalt could actually increase in the next decades because of rising temperatures in some parts of the Earth. When subjected to extreme temperatures, asphalt releases harmful greenhouse gases (GHG) into the atmosphere.
| Emissions from Road Construction (Source) | CO2 equivalent (%) |
|---|---|
| Asphalt | 28% |
| Concrete | 18% |
| Excavators and Haulers | 16% |
| Trucks | 13% |
| Crushing Plant | 10% |
| Galvanized Steel | 6% |
| Reinforced Steel | 6% |
| Plastic Piping | 2% |
| Geotextile | 1% |
Asphalt paved surfaces and roofs make up approximately 45% and 20% of surfaces in U.S. cities, respectively. Furthermore, 75% of single-family detached homes in Canada and the U.S. have asphalt shingles on their roofs.
Reducing the Environmental Impact of Asphalt
Similar to roads, asphalt shingles have oil as the primary component, which is especially harmful to the environment.
Shingles do not decompose or biodegrade. The U.S. alone generates ∼12 million tons of asphalt shingles tear-off waste and installation scrap every year and more than 90% of it is dumped into landfills, the equivalent of 20 million barrels of oil.
But most of it can be reused, rather than taking up valuable landfill space.
Using technology, the primary components in shingles can be repurposed into liquid asphalt, aggregate, and fiber, for use in road construction, embankments, and new shingles.
Providing the construction industry with clean, sustainable processing solutions is also a big business opportunity. Canada alone is a $1.3 billion market for recovering and reprocessing shingles.
Northstar Clean Technologies is the only public company that repurposes 99% of asphalt shingles components that otherwise go to landfills.
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