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!
We’ve written before on the topic of asphalt sustainability, asphalt is one of the most recycled products in the United States. This recycled material can then be used for future projects.
Recycled asphalt is often referred to as reclaimed asphalt pavement or RAP. The material is removed and reprocessed from pavements that are currently undergoing reconstruction or resurfacing. The material then either undergoes a cold milling process or a full depth removal and crushing.
Large scale organizations, such as the Missouri Department of Transportation (MoDOT) use reclaimed asphalt and recycled tear-off shingles in many of their projects. The organization estimates that in 2009 they saved $20 million on resurfacing projects in which recycled asphalt was used. In addition to the substantial cost-savings, the use of reclaimed and recycled materials decreased the amount of items headed to Missouri landfills.
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.
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.
The temperatures may be heating up, but the hot talk in the pavement industry is warm mix asphalt (WMA). The new technology is gaining acceptance at an unprecedented rate, 44 of the 50 states have completed WMA jobs.
The wide acceptance of WMA has been so quick because of the numerous advantages it has over hot mix asphalt, these include:
• Less environmental impact
• Less fuel use by the mixing plant
• Decreased wear on the mixing plant
• Longer haul distances, creating an extended paving season
• Increased time for compaction, leading to better densities
• Longer pavement life
Warm mix asphalt is made by using a variety of products and process to replace the heat normally necessary to produce asphalt mix. Keeping the mixing temperatures low, 50 – 100 degrees Fahrenheit less than required for traditional asphalts, results in reduced emissions and fumes and can also lead to a significant energy savings.
While the benefits are obvious, WMA does present some challenges. First, the industry hasn’t fully adapted and some job specifications do not provide for using WMA technology. With new technologies come unknowns, more studies are needed to further investigate the benefits, long-term suitability and sustainability of warm mix asphalt. For more information on WMA, visit www.WarmMixAsphalt.com.
Source: Talking Asphalt: What About Warm Mix by Dwight Walker
Asphalt is the most recycled product in the United States with 80% being recycled — that’s more than aluminum cans, newspaper and plastic and glass beverage containers! Each year approximately 100 million tons of pavement material is reclaimed.
When asphalt roads are removed, the old asphalt is crushed and mixed with additional aggregate and asphalt cement, the binder, to form new asphalt which can be used to make shoulders or road base or to pave new roads or parking lots. That’s the circle of asphalt.
From the production of the material, to the placement of the pavement on the road, to rehabilitation through recycling —asphalt pavements minimize impact on the environment. Low consumption of energy for production and construction, low emission of greenhouse gases, and conservation of natural resources also help to make asphalt the sustainable choice for your pavement needs.
Video on recycling asphalt: http://www.pavegreen.com/index.php?option=com_content&view=article&id=119:the-circle-of-asphalt&catid=44:recycled-asphalt&Itemid=108