Team Cam's paving experience includes stringent specifications with commercial asphalt paving and parking lot jobs in thousands of commercial settings, including the demanding requirements of many municipal projects in and around the Baltimore/DC areas.
Some key factors to consider for asphalt repair and paving in an effort to make the finished asphalt pavement last: (1) type and quality of the sub-base that the asphalt is built on, (2) the asphalt thickness that is suitable for the type and amount of traffic on the surface, (3) quality craftsmanship and construction methods used to make the asphalt, and (4) proper drainage methods that were instituted and implementation to protect the longevity of the asphalt.
Sub-base. The most important distinction between sub-base and base is that the sub-base is the soil already on location that the pavement will be constructed on. Gravel is usually brought in by truck and placed over the sub-base; this is the layer that the final asphalt application will rest upon. All considered equal, the worse the asphalt sub-base, the more effort will be required into constructing an appropriate base and pavement. It’s much harder to make pavement last on soft and wet sub-bases (Maryland wetlands, for example), than it is for building payment on dry and harder or compacted sub-bases. Increasing the aggregate size, including and overall thickness of the base will increase the longevity of the asphalt pavement.
Pavement Thickness. As a general rule of thumb, the more traffic that passes over an asphalt surface, including the weight of the traffic, the thicker the pavement is necessary. For example, a residential driveway with very little traffic and lighter vehicles could be as thin as 2″. Highway and public thoroughfares could be as thick as 24″ or more due to the traffic volume and the weight of the vehicles passing over it.
Construction Methods. Proper heat, density (compaction) and joint construction (where the paver passes to connect to each other) contribute to the length of time or longevity of an asphalt pavement surface. Irrespective of the initial appearance, a knowledgeable contractor adhering to these issues will install a pavement that lasts longer.
Drainage. The asphalt institute claims that the three biggest enemies of asphalt longevity are: “water, water, and water.” It is imperative that the pavement is designed to allow water to get off of the surface or to strategically place storm drainage structures.