Evotherm warm-mix asphalt technology is a next-generation paving solution that significantly lowers temperatures for asphalt production and applications – resulting in major reductions in fuel consumption and environmental impact.
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Features and Benefits
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Our Evotherm additive can be used in any traditional hot-mix application – from the binder course to the surface course.
Evotherm’s unique technology allows asphalt application at a temperature that is 100 to 130°F (50 to 75°C) lower than traditional hot-mix applications.
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This reduction in temperature expands the area a plant can service – broadening markets without compromising quality. Plus, this new technology doesn’t require a change in equipment, so switching to Evotherm is simple.
Benefits
- Evotherm requires no equipment changes at the plant or job site. To reduce mix temperatures, the water-based Evotherm is metered into existing materials.
- Evotherm mixes have the same aggregates, volumetrics and binder content as traditional hot mixes.
- Temperature and energy requirements are lower with Evotherm.
- Evotherm drops into existing HMA job mix formula.
- Workability and compaction at reduced temperatures are easier than HMA, especially for coarse mixes and polymer modified asphalts.
- Traffic is returned immediately after compaction
- Evotherm binder performance matches or surpasses the qualities found in new hot mix asphalt
- Evotherm lessens the wear and tear on hot mix equipment due to its lower processing temperatures.
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Decreased emissions at the hot-mix plant (.PDF)
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Reduced job site emissons (.PDF)
Environmental Advantages
Evotherm has consistently demonstrated major reductions in emissions compared to hot mix asphalt:
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A nearly 50 percent decrease in carbon dioxide greenhouse gasses
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A nearly 60 percent reduction in nitrogen oxides that lead to photochemical smog
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More than 80 percent drop in acid rain-causing sulfur dioxide
Energy Conservation and Savings
There are many variables associated with energy usage, but Evotherm projects have had documented energy savings up to 55 percent. Warm mix paving projects have an initial three to seven percent difference in total job costs, however, these costs are off-set by fuel cost reductions, proportionately longer pavement lifecycle, and decreased maintenance requirements.
Engineering Reports
In April 2008, the Texas Department of Transportation (TxDOT) and the Lane Construction Corporation constructed one of the largest warm-mix asphalt projects to date using Evotherm warm-mix asphalt technology. The National Asphalt Pavement Association awarded the project a Quality in Construction award in 2008.
Read more.
Since MWV and Eurovia collaborated in 2003 to develop the Tempera® / Evotherm™ warm mix asphalt process in Europe, numerous validation tests have been conducted confirming the viability of the process.
Read more about this successful collaboration.
On December 8, 2008, the City of New York conducted a paving trial to demonstrate the feasibility of producing and constructing Evotherm warm mix pavement during seasons of the year when ambient weather conditions prevent the use of conventional hot mix asphalt. Extremely cold and windy conditions were prevalent throughout the construction of the Evotherm pavement. Despite these unfavorable weather conditions, the Evotherm mix hauled well, extended well through paver and auger box, and compacted easily under normal compaction patterns using standard roller equipment.
View the detailed report (.PDF).
The following trials were conducted in Canada and led by McAsphalt Industries. The outcome of the trials are detailed in the reports below and include specific information on Evotherm's sound performance and ease of use.
Aurora Ontario Trial (.PDF)
City of Calgary Trial (.PDF)
Ramara Township, Ontario Trial (.PDF)
To learn more, download a technical brochure on how Evotherm works.
Evotherm on the Test Track
The National Center for Asphalt Technology's Pavement Test Track, based at Auburn University, is broken into 200 foot test sections designed to test performance of certain asphalt mixes. Evotherm is being test on the track in sections E9 and E10.
To view Evotherm performance on the test track, click here.
Additional Information
Additional information on Evotherm can be found at the National Asphalt Paving Association and Federal Highway Administration.
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100 degrees Fahrenheit or more below the hot-mix asphalt
temperatures is possible with warm-mix asphalt technology.
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Evotherm mixes are odor free and have been found to reduce job
site emissions by 40-80 percent.
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Evotherm produces lower temperatures, which mean greatly
reduced fumes.
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Pictured above is an Evotherm paving job site in France.
