PAVEMENT PRESERVATION: WHAT ARE MY OPTIONS?
Whether you are the person in charge of maintaining a road network, or simply the owner or manager of a business that relies on the smooth in flow and out flow of vehicles into your premises each day, you will need to have a handle on the practicalities of asphalt preservation.
As any asphalt paving company in Michigan will tell you, there is actually quite a lot of choice out there for extending the lifespan of your asphalt.
Your main options for maintaining your current lot in its tip top condition are;
This is a light application of asphalt emulsion spray. It is designed to bolster the top layer of the paving to prevent water from getting in, as well as to stop the long term degradation of the asphalt.
This kind of sealing can also be used on chip seal, to extend its lifespan.
CONDITION: Fog seals are best for paving which are already in a pretty decent state and don’t suffer from any structural issues.
A chip seal is cutback or emulsified asphalt coated with aggregate. It is applied as a spray and will protect the top layer from water. Additionally, it can work to seal up minor faults such as smaller cracks and road surface problems like raveling. It may also boost the friction resistance of your paving.
CONDITION: A chip seal really is best for roads and paving with only the most superficial of surfacing issues.
A crack seal is usually a polymer modified asphalt, which is placed over the pavement to prevent water from getting in. It also protects the pavement layer from any dirt or debris from getting into existing cracks or holes and making them worse.
This is a highly popular treatment, which driveway paving contractors in Michigan are accustomed to applying for their customers, regularly.
CONDITION: Crack sealing, although best on paving in good condition, may also be attempted on asphalt in less than perfect condition – just be aware that the results you get may not be as good.
This is emulsified asphalt that has been coated with a fine aggregate or sand. It is applied as a spray and protects the paving from water. It also has the additional advantage of giving the asphalt surface improved friction resistance.
CONDITION: These seals will be most effective on well maintained pavements with no obvious defects.
This is a spray of emulsified asphalt that is then followed with a series of brooms, to help the emulsion run into the holes and cracks of the paving.
Afterward, there may be aggregate applied, which could also be applied using a broom and then a tire roller, to seat it. A lot of people find this a highly useful treatment which may work better than some of the other options.
CONDITION: A scrub seal requires the asphalt to be in a good condition, structurally, and with only average surface issues.
THIN HOT MIX OVERLAYS
This is a combination of asphalt binder and aggregate which is laid up to one and a half inches thick. These thin overlays help issues such as rutting (as long as it is not too pronounced) and raveling.
Before applying the overlay, any cracks should be sealed in the traditional manner first. Once applied, your paving should have the impression of a nice new asphalt layer.
CONDITION: This type of seal should only be applied to surfaces in a good condition and with only minor surface issues – fix any cracks before applying.
This is two layers of sealant – the first with bigger aggregate and the second with smaller.
CONDITION: These seals will work better on a pavement with good structure and only superficial flaws.