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Even the most well constructed asphalt will deteriorate over time. Highways, streets and parking lots are no exception. During the initial years of its design life, asphalt will deteriorate slowly. As time passes, and the design life of pavement reaches the end of its cycle, the rate of deterioration accelerates. Proper asphalt maintenance will significantly lengthen the life of a pavement system but eventually rehabilitation and/or reconstruction may be necessary. More often, more than one technique can be used to solve the specific pavement problem. Whichever technique is chosen should be based upon a thorough engineering analysis of the pavement’s proposed application and an economic analysis of costs and benefits.
Coastal Paving’s staff has an extensive background of determining pavement failures through conducting a thorough condition survey. The results of this survey provide the foundation and basis for determining the level of maintenance required. Coastal Paving assists the client with developing and economic analysis and priority listing of maintenance, rehabilitation, or reconstruction that may be required for the pavement area. Some of the most common asphalt services that we provide include the following:
- Surface Patching: Areas where small hairline cracks, minor surface distortion or raveling, a surface or “skin” patch is the most cost effective technique. A layer of hot-mix asphalt is placed and rolled over the distressed area and generally does not require removal of the pavement section.
- Asphalt Overlays: This could include one or more courses of asphalt on an existing pavement structure.
- Crack Repair: These problems are the separation of the pavement due to natural causes, traffic volume, or reflections from an underlying pavement. Cracks should be repaired to prevent intrusion of foreign materials into the subgrade and to prevent water intrusion into the underlying pavement layers.
- Asphalt Removal and Replacement: Deep patches, minimum of 4”, are used for making permanent repairs the pavement. Many asphalt removal and replacement areas exhibit alligator cracking, an interconnected series of cracks forming small blocks resembling an alligator’s skin or chicken wire.
- Asphalt Cold Milling: This processes allows for the removal of a section of asphalt paving, from 2-6”, and loading the material via conveyor to a off haul truck. The millings can then be used as recycled asphalt product as long as there is no existence of pavement fabric. After the area has been swept clean a layer of asphalt may then be applied to maintain surface height. This technique is effective large areas of shoving or corrugation. Shoving is also known as pavement bulging whereas corrugation is known as washboarding or rippling of the pavement section.
- Asphalt Overlays with Interlayer Fabrics: Paving Fabric Interlayers are engineered geotextile fabrics placed between layers of asphalt concrete. Overlays with interlayer fabrics have had an outstanding record of improving pavement performance while reducing maintenance and life-cycle costs. Paving Fabric Interlayer Systems extend the life of new AC pavements and AC overlays. When placed between layers of AC pavement, these systems becomes an integral part of the asphalt section, forming a barrier to water infiltration and absorbing stresses to reduce reflective and fatigue cracking of the new asphalt surface layer.
- Full Depth AC Repair: Full depth asphalt repair is the repair of last resort. It requires complete removal of the pavement section and is constructed with new asphalt at a thicker section than was originally designed. The purpose of full depth repair is to go below the pavement section and replace missing or compromised subgrade with hot mix asphalt concrete. This type of repair is generally the most expensive yet the longest lasting improvement.