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Pavement Types

Basically, all hard surfaced pavement types can be categorized into two groups, flexible and rigid. Flexible pavements are those which […]

HMA Pavement

HMA pavements are classified as “flexible” pavements because the total pavement structure deflects, or flexes, under loading. A flexible pavement […]

Permeable Pavements

Permeable pavements allow water to infiltrate through surfaces that would normally be impermeable, such as asphalt or portland cement concrete […]

Mix Types

HMA Mix Types The most common type of flexible pavement surfacing in the U.S. is hot mix asphalt (HMA). Hot […]

Asphalt Concrete Base (ACB)

Asphalt concrete base (ACB), also called asphalt treated base (ATB), is a dense-graded HMA with a larger nominal maximum aggregate […]

Stone Matrix Asphalt

Stone matrix asphalt (SMA) is a gap-graded HMA (Figure 1) that is designed to maximize deformation (rutting) resistance and durability […]

Open-Graded

An open-graded HMA mixture is designed to be water permeable (dense-graded and SMA mixes usually are not permeable). Open-graded mixes […]

Dense-Graded

A dense-graded mix is a well-graded HMA mixture intended for general use. When properly designed and constructed, a dense-graded mix […]

Sam Lancaster

Samuel Lancaster, Road Engineer Samuel Christopher Lancaster was born in 1865, in Magnolia, Mississippi; he died in 1941. Sam Lancaster […]

Full-Depth Reclamation

Although referred to as “full-depth reclamation”, this process is just an extension of the basic CIR principles to the entire […]