Cooler asphalt offers one route to more sustainable road building
2008
Exploring Cooler Asphalt for Sustainable Road Building
publication
Evidence: moderate
Author Information
Author(s): Frazer Lance
Hypothesis
Can lower-temperature asphalt pavements reduce environmental impact while maintaining performance?
Conclusion
Warm-mix asphalt can reduce energy use and greenhouse gas emissions compared to traditional hot-mix asphalt.
Supporting Evidence
- Warm-mix asphalt uses 20% less energy to produce than hot-mix asphalt.
- Warm-mix asphalt produces 20% fewer greenhouse gas emissions when applied.
- Countries like Norway and Italy have seen significant emissions reductions after switching to warm-mix asphalt.
Takeaway
This study looks at using cooler asphalt to make roads, which is better for the environment and still works well.
Limitations
Warm-mix asphalt has only been used for about 10 years, so more data is needed to confirm its long-term effectiveness.
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