“Chip Sealing” is a common pavement maintenance practice that extends pavement life and provides a good driving surface. Since some ODOT customers may not be familiar with the chip seal construction method, this fact sheet answers some frequently asked questions.
How are Chip Seals Different from Asphalt Overlays?
The difference is in the construction method. Hot Mix Asphalt pavement is produced by heating liquid asphalt and mixing it with aggregate, with the mix then spread and compacted to form a durable road structure and riding surface. Chip Sealing uses the same ingredients as asphalt concrete paving, but the construction method is different. With chip seals, a thin film of heated asphalt liquid is sprayed on the road surface, followed by the placement of small aggregates (“chips”). The chips are then compacted to orient the chips for maximum adherence to the asphalt, and excess stone is swept from the surface. The ingredients of hot mix asphalt and chip seals are the same; only the construction methods are different.
Click Here to Read More about this Chip Seal Fact Sheet posted on the Ohio Department of Transportation website