Asphalt is everywhere. It’s the most noticeable material in paving, from highways to driveways. While its durability and cost-effectiveness are well recognized, asphalt concrete’s environmental benefits are also surprisingly significant but less widely known. This article explores how asphalt contributes to sustainable building practices and environmental conservation, right there in your own neighborhood or town.
Recycling and Reusability
Asphalt stands out for its recyclability, with the National Asphalt Pavement Association noting that it is the most recycled product in the United States. Old asphalt pavements are frequently milled and recycled into new pavements, reducing the need for virgin raw materials and minimizing waste in landfills. This process conserves natural resources and reduces environmental impact, making asphalt a preferable choice in eco-friendly construction and renovation projects.
Energy Efficiency
The production of Warm Mix Asphalt (WMA) requires temperatures that are 50 to 70 degrees Fahrenheit lower than those needed for Hot Mix Asphalt (HMA). This significant reduction in heating requirements leads to lower emissions of greenhouse gases and pollutants. Additionally, the lower temperature decreases fuel consumption, enhancing overall energy efficiency in road construction and maintenance. This is not some kind of a pipe dream, but it is highly effective technology, currently being produced and used in 44 states across the country.
Durability and Maintenance
Asphalt concrete’s longevity means roads and driveways need less frequent replacement or repair, leading to a decrease in the use of construction materials and resources over time. Technological advancements in asphalt mixes also contribute to this durability, further enhancing its environmental benefit by prolonging the pavement lifecycle and reducing the frequency of resource-intensive repair work.
Water Management and Quality
Prepare to be amazed! Did you realize that there is such a thing as “porous asphalt”? Absolutely, because porous asphalt is an innovative solution that addresses urban runoff and water quality issues by allowing water to drain through the pavement surface into the ground below, thus recharging aquifers and reducing stormwater runoff. This type of pavement system diminishes the impact on local sewer systems and mitigates the risk of flooding, playing a crucial role in sustainable urban planning. By having fewer ‘fines’ (rock dust, sand, etc.) in the mix, the gap between aggregate is slightly greater–just enough to allow a pass-through of water. The ecological benefit is that allowing the water to percolate into the soil beneath the asphalt rather than just flow across the surface, out to the street, and then to oceans and waterways, it gets directly returned to the aquifers below ground.
Reduction of Urban Heat
Asphalt’s potential to minimize urban heat islands is significant. Reflective or lighter-colored asphalt surfaces reflect more sunlight and absorb less heat than traditional black asphalt. This property can significantly reduce urban temperatures, decreasing the demand for air conditioning in surrounding buildings and thus reducing energy consumption and associated emissions. Heat islands are defined as urban areas that are warmer in the summer because of the preponderance of nearby buildings, other structures, and roads. EPA – Heat Islands
Noise Reduction
Asphalt pavements contribute to reduced noise pollution compared to other pavement types. The smooth surface of asphalt absorbs road noise better, leading to quieter neighborhoods and urban areas. This reduction in noise pollution not only enhances the quality of life but also contributes to a healthier urban environment.
Conclusion
Asphalt offers numerous environmental benefits that make it a smart choice for sustainable construction and paving projects. In fact, the Virginia Asphalt Association labels asphalt concrete as “…the most sustainable paving material for constructing pavements…”
Its ability to be recycled, combined with its energy-efficient production processes and contributions to improved water management and reduced urban heat, underscores its role in environmental stewardship. Opting for an asphalt driveway or pavement reflects a commitment to sustainability and responsibility toward preserving our environment for future generations.
Secure Your Custom Asphalt Paving Estimate Today!
When planning your next paving project, consider asphalt not just for its practical and economic advantages but also for its environmental benefits. By choosing asphalt, you’re opting for a material that supports sustainable development and offers a range of ecological advantages.
A good way to begin is to contact one of the designers in the estimating department at Maisano Brothers, Inc., paving contractors, now in its 57th year of service to this community. They can supply you with design ideas and cost information. At the very least, it’s a great way to begin.
