Chip seals, also known as stone seals, combine an asphalt layer and cover aggregate to provide a skid resistant wearing surface. The treatment preserves and protects the aging surface, fills minor cracks, and seals and waterproofs the existing pavement.
Chip seals provide increased durability and are typically applied to roads with traffic volumes up to 2,500 AADT. Multi-layered chip seals may also be used to greatly improve resistance to reflective cracking on existing roads, or as a first asphalted surface on low-traffic, well-graded gravel roads. Worldwide, chip seals are the most widely used pavement preservation treatments.
Chip Seal Benefits
- Waterproofs and seals small cracks and imperfections, preserving structural integrity
- Enriches aged and oxidized asphalt pavements
- Improves skid resistance and provides durable friction
- Protects underlying pavement from traffic wear
- Stretches maintenance dollars as one of the lowest cost treatments available
- Effective preventive maintenance preserves the value of your pavements
Chip Sealing Process
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Sealing of minor cracks, hot mix leveling to correct surface deformations and cleaning of the surface prior to treatment.
Spray Application of Emulsion
Spraying of approximately 0.40–0.44 gallons per square yard of modified asphalt emulsion.
Cover Aggregate Application
Placement of approximately 20–25 pounds per square yard of 3/8” cover aggregate.
Immediate rolling for proper embedment and orientation of the cover aggregate into the emulsion layer.
Removal of excess cover aggregate by sweeping after 2–5 days of curing.