chipsealed

Chipsealing is a pavement surface treatment that applies a layer of bitumen binder followed by a layer of aggregate chippings. It is a common and cost-effective method for sealing and protecting existing road surfaces, particularly in areas with lower traffic volumes. The process begins with spraying a hot liquid asphalt binder onto the road. Immediately after, a single layer of clean, crushed aggregate chippings, typically granite or limestone, is spread evenly over the binder. A roller then presses the chippings into the binder, creating a strong, interlocking surface.

The primary purpose of chipsealing is to prevent water penetration into the underlying road structure, which can cause deterioration, especially during freeze-thaw cycles. It also provides a new, skid-resistant wearing surface, improving road safety. Chipsealing can extend the life of existing pavements by several years, delaying the need for more expensive resurfacing or reconstruction. The aggregate size and type can be varied to achieve different aesthetic qualities and performance characteristics. While chipsealed surfaces are durable, they can shed some loose chippings in the initial period after application, which is a normal part of the curing process.