Repaving and Preservation Methods

Repaving Methods
 

• Pavement Reclamation

This method involves pulverizing the entire asphalt layer and a portion of the base beneath it to create a stable new foundation. The base is regraded, then two layers of hot mix asphalt are applied for a total depth of about 4 inches. This is typically used on roads with severe deterioration or where grade adjustments are needed.

• Mill and Overlay

This process removes the top layer of pavement (via cold planning) and replaces it with about 1.5 inches of new asphalt. It improves drainage and preserves curb height, making it ideal for streets that are still in reasonably good condition. 

Preservation Methods

 Preservation techniques extend pavement life in a cost-effective way, reducing the need for full reconstruction and minimizing disruption to the public. 

• Crack Sealing

This involves filling cracks with a flexible sealant to stop water infiltration and prevent further deterioration. It’s a quick and affordable solution that can be used on its own or before other treatments. 

• Fog Sealing

A thin coating of liquid asphalt is applied to protect and rejuvenate the surface of roads in good condition. It helps prevent damage from sun and weather and usually requires only brief road closures. 

• Microsurfacing

Microsurfacing applies a 3/8-inch thick protective layer over existing pavement. Applied in two coats, it seals the surface and restores skid resistance. Crack sealing and minor repairs are typically completed beforehand. 

• Cape Seal

Cape sealing combines chip seal and microsurfacing. First, a chip seal coat is applied to reinforce the road. After about a week, a microsurface finish is added, leaving a smoother surface. Structures such as manholes may be adjusted before treatment.