What is asphalt milling. The process of asphalt milling is one of the most common forms of asphalt reconstruction you see and probably without even realizing you’ve seen it. Asphalt milling is uses a lot on highways. Before the new asphalt is laid on the highway you know those vertical “grooves” that always begin and end with a bump? That is asphalt milling. So how does it work? Asphalt milling is completed in a few steps. First the milling machine scrapes off the top layer of asphalt using a milling drum that is set to the desired depth, usually 2″. The asphalt that is scraped off is transferred through the machine to a long conveyor belt that deposits the milled asphalt into dump trucks driving at the end of the conveyor. The dump truck then takes the “millings” back to the asphalt plant where they are recycled and used to create new asphalt. The milled surface that is left behind is then swept clean of any loose debris and is now ready for new asphalt.
Some of the benefits of milling are:
- It saves money. Milling is one of the more cost effective ways of paving reconstruction.
- It is environmentally friendly. The milled asphalt is recycled to make new asphalt. Although milling is not as eco friendly as reclaiming/pulverizing.
- Speed. Aside from resurfacing your lot, milling is the quickest solution to asphalt reconstruction.
Asphalt milling does share a lot of the benefits that asphalt reclaiming/pulverizing does but there is one downside. Asphalt milling is only effective when the asphalt failures throughout your parking lot are not that bad. Since you are only scraping away the top 2″ of asphalt you are not really correcting any problems with the base, but if your parking lot isn’t is too bad of shape then chances are your base is ok.