Superpave Mix Design
One of the principal results from the Strategic Highway Research Program (SHRP) was the Superpave mix design method. The Superpave […]
flexible
HMA Placement Considerations
There are, of course, many considerations to take into account when placing HMA. Many are dependent upon local materials, weather, […]
HMA Placement
Mix placement and compaction are the two most important elements in HMA pavement construction. Mix placement involves any equipment or […]
HMA Weight-Volume Terms and Relationships
Basic HMA weight-volume relationships are important to understand for both mix design and construction purposes. Fundamentally, mix design is meant […]
Aggregate Segregation
“Segregation” is a term often used in the HMA industry to describe a number of different phenomena. It’s most general […]
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 […]
HMA Mix Design Fundamentals
HMA consists of two basic ingredients: aggregate and asphalt binder. HMA mix design is the process of determining what aggregate […]
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 […]
Full-Depth Reclamation
Although referred to as “full-depth reclamation”, this process is just an extension of the basic CIR principles to the entire […]