The following is a short list of terms used in the asphalt industry.
For a complete list of terms, visit the Asphalt Institute at www.AsphaltInstitute.org.
Hard, inert mineral material, such as gravel, crushed rock, slag or crushed stone, used in pavement applications either by itself or for mixing with asphalt
A mixture of crude petroleum used for paving, roofing, industrial and other special purposes.
A mixture of asphalt binder and aggregate thoroughly mixed and compacted into a mass.
Asphalt concrete over supporting courses such as asphalt concrete bases, crushed stone, slag, gravel, Portland Cement Concrete (PCC), brick or block pavement.
A manufacturing facility that produces asphalt paving mixtures.
Asphalt Rubber Binder (AR)
Recycled ground tire rubber is added to conventional asphalt cement. Roofing shingles may also be added to the asphalt cement.
Asphalt rubber binder with a consistency ranging from coffee grounds to peanut butter.
Hot Mix Asphalt (HMA)
High quality, thoroughly controlled hot mixture of asphalt binder (cement) and well-graded, high-quality aggregate, which can be compacted into a uniform dense mass.
Hot Mix Asphalt (HMA) overlay
One or more courses of HMA over an existing pavement.
A mixture of asphalt emulsion and mineral aggregate used in relatively small areas to patch holes, depressions and distressed areas in existing pavements.
The lower or underlying pavement course atop the subbase or subgrade and under the top or wearing course.
Reclaimed Asphalt Pavement (RAP)
Pulverized excavated asphalt that is used as an aggregate in the recycling of asphalt pavements. Factory-rejected roofing shingles can also be added to RAP.
Recycled asphalt mix
A mixture produced after processing existing asphalt pavement materials such as shingles and rubber.
A non-porous material used in reservoir liners and landfill caps.
Source: Asphalt Institute, National Asphalt Pavement Association