The Aggregate Section is responsible for evaluating all the aggregates that go into Ohio's Highways through physical testing. These aggregates are used in a variety of pavements such as aggregate bases (304), hot mix asphalt bases (301), portland cement concrete bases (305), hot mix asphalt (703.05), portland cement concrete (703.02). The aggregates are also used for other purposes such as pipe backfill (603), slope and channel protection (601), shoulders (617), and a variety of other uses.
The section is responsible for interpretation of specifications related to the various aggregate uses and the implementation of new specifications as needed. The Districts, project personnel, and Contractors rely upon the Aggregate Section for technical support, testing procedures, and techniques. Also provided is information to the contractors for using in designing portland cement concrete, hot mix asphalt, and special aggregate bases
Aggregates comprise a certain percentage of ODOT pavements and bases, the following is an example of those percentages.
Aggregate Bases - 100% of every ton
Hot Mix Asphalt - 94% of every ton
Portland Cement Concrete - 83% of every cubic yard
Aggregates are the base of all Ohio roads. Because of this it is very important that all aggregates pass very strict testing requirements.
AGGREGATE - Any combination of sand, gravel, slag, crushed stone in their natural or processed state.