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The Benefits of Warm Mix Asphalt

At Lertiz & Busy Bee, we’re dedicated to not only supplying superior paving solutions, but providing leadership in the asphalt community. When new technologies arise, it is our goal to educate customers on the benefits we could bring to their paving projects. In this blog entry, we would like to explore the slew of advantages warm-mix asphalt has over conventional paving methods.


Warm-mix asphalt gained notoriety in Europe several years back for its positive impacts on the environment. Since then several communities here in the U.S. have adopted the process—including St. Louis—making it a popular alternative paving method. In 2011, over 200,000 tons of warm-mix asphalt was laid in the tri-county St. Louis area alone.


While some of the advantages may seem obvious, here is a basic rundown of the benefits warm-mix asphalt can bring.


    • Reduction in emissions: VOC and CO2 can be reduced by up to 60%. This process allows the contractor to lower the temperature of the asphalt by over 50 degrees, thus dramatically reducing the production of greenhouse gases.

 

    • Energy Savings: It’s quite common for asphalt plants to see a reduction of over 30% in energy costs.

 

    • Less Fuel: Because the temperatures run so much cooler, less fuel is used during the mixing.

 

    • Less Odor: Traditional asphalt emits not only a cloud of smoke, but also a very strong odor. If you’re running a business that is open to the public, do you really want them greeted this way? Warm mix asphalt produces less odor and yields little to no gas during the paving process.

 

    • Safer: Working with traditional hot-mix asphalt can be a very dangerous process. With warm-mix asphalt, not only will the contractor be exposed to less odor and smoke, but the risk of severe burns is reduced.

 

    • Faster: Because the compaction process is quicker, it allows roads and parking lots to open up to traffic sooner. For any business, time is money. For example, the longer a retail parking lot is closed the longer it serves as a burden to its customers.

 

    • Less Cracks: The binding process requires less ageing, which in return will increase the longevity of the asphalt.

 

For almost 30 years, the folks at Leritz & Busy Bee have been supplying the St. Louis area with innovative paving methods. If you have any questions regarding warm-mix asphalt, please feel free to reach out! Remember: for all your commercial and residential paving needs, think Lertiz & Busy Bee!

As corporations continue to inquire about green products and services, it is vital we develop solutions that are not only effective but realistic for the average business owner to implement. At Lertiz & Busy Bee, we have adopted a proven practice that will not only lessen our impact on the environment, but increase your bottom line!

Full depth reclamation is a process in which old asphalt pavement is recycled and reused to help create a new surface. The way it works is quite simple: the old existing asphalt is pulverized and treated to create a solid, stable base.

You might be asking yourself: “Sounds great, but it’s probably more expensive, right?” Wrong! Unlike the conventional method, there is no need to make a trip to the landfill. We use 100% of the existing surface, allowing us to cut down on material costs and reduce project timelines.

Here is a simple breakdown of the four step process:

  • Pulverize – Using a special machine called a Reclaimer we pulverize the old asphalt and blend it with the rock base. It has been proven through the years that reclaiming old asphalt is a much more effective way to build a solid core base.
  • Treat – During the second phase of the process we treat the base with special additives such as lime or calcium chloride. Once treated, it is time for another round of pulverizing to help further compound the base.
  • Re-grade – The re-grading will allow us to shape and reform the base to better fit the contour of the roadway or parking lot.
  • Pave – Once the base is shaped and compacted it is time to start paving. This is the only step in the process that is similar to the conventional method. The asphalt used is a standard blend that would be used in any traditional pavement project.


Reclaiming asphalt is an age-old practice with a proven track record of not only cutting down material costs, but ensuring projects are completed in a timely fashion.

If you have any questions regarding full depth reclamation, please don’t hesitate to drop us a line. Remember: For all your commercial and residential paving needs, think Lertiz & Busy Bee!

A new white paper from the Asphalt Pavement Alliance sheds light on the beneficial effects asphalt pavements can have on water quality.

According to Dr. Howard Marks, principal author of the report “Cleaner Water with Asphalt Pavements,” the green benefits of 100 percent recyclable asphalt pavement might be surprising to some. Asphalt pavement s are clean and environmentally beneficial for improved stormwater management, clean drinking water and reduced roadside pollution.

One common misconception is that asphalt pavements leach petroleum into the earth, this is not the case. In fact, asphalt pavements have several eco-friendly benefits including the fact that smooth asphalt pavements save fuel and overall has a small carbon footprint compared to other paving materials.

To download a free copy of the study and learn more about the benefits of asphalt, click here.

Harnessing the Heat

In the dog days of summer you may feel the heat radiating off of pavement surfaces, can we find a way to harness the heat for good?

Thermal energy has been used for decades to warm eco-friendly pools, but tech company Novotech has patented an idea known as Roadway Power Systems. Michael Hulen, Novotech founder, says the technology has many practical applications. For example, a hotel with a large parking lot could run a piping system under the pavement, using the heat absorbed by the asphalt to heat water for laundry and shower, reducing energy consumption. The captured heat can also create electrical power by creating high-pressure steam. This steam can spin a turbine and produce kilowatts or even megawatts of power.

Unlike conventional solar systems, asphalt retains heat even after the sun goes down, therefore it could continue producing energy even after sundown. Novotech estimates that a two-acre parking lot could cool a 30,000 square foot building. While the technology is still in the beginning phases and has yet to be rolled-out in large scale, it certainly seems to have promise in harnessing the heat!

For more information on Roadway Power Systems, click here.