Hot-In-Place recycling, is an efficient process used to repair and rehabilitate deteriorated bituminous streets and highways on-site with specialized equipment. Dustrol's MARS system (Mobile Asphalt Recycling System) is our newest method of rejuvenating asphalts of up to 2 inches or more.
This recycling discipline provides a low-cost maintenance strategy for removing cracks, ruts, and low areas by utilizing existing asphalt pavement for in-place rehabilitation. Flexibility and quality are restored to the asphalt material and the pavement is prepared for other surface treatments.
Highly efficient equipment and improved methods of pavement rehabilitation allow for a recycled street to be completed and opened to traffic with only a few hours delay. Although highly visible to the public, the process is fast and presents only minor inconvenience to motorists.
This process may be performed as either a single lift or multiple lift rejuvenation. In the single lift method, scarifiers loosen the heated material to a depth of up to a inch.. The multiple lift operation allows for the rejuvenation to go to 2 inches or more using milling heads to loosen the material. Both processes allow surfacing to be placed the same day or up to weeks later.
Hot-In-Place recycling allows the available dollars to be spread over more square yards of pavement maintenance areas. Increased costs of maintenance work make this process a very desirable alternative in a roadway repair program.
1. Dustrol's MARS process begins with two or more custom-made, propane-fueled preheaters.
2. The next heater in the train is equipped with grade controlled milling drums which windrow the top 1" of material. The milling heads are capable of milling 15' wide and 1" deep.
3. The tunnel heaters begin heating the underlying pavement while maintaining the temperature of the windrow.
4. The surface is then milled and heated by up to three more milling heaters followed by tunnel heaters depending on material and depth.
5. The last milling heater in the process has a oil metering system that injects and mixes rejuvenating agent. This unit performs the last phase in our recycling process.
6. The windrow after having rejuvenating agent added and mixed is picked up with a conventional elevator.
7. The paving process in MARS is performed with a conventional electronic grade control, electric screed paver.
8. After paving the material is rolled using conventional rollers.
9. Finished Material after laydown and compaction. The road can be opened to traffic after a cool off period similar to an asphalt paving operation.
Example of pavement distress that is being addressed by the Mobile Asphalt Recycling System.
By utilizing our process you can expect the following benefits:
less impact on the environment
reduced cost allows more miles of roadway to be maintained.
Minimal impact on traffic.
Process is independent of other processes, allowing a more flexible schedule