WES continued to refine the Marshall method through the 1950s with various tests on materials, traffic loading and weather variables.

It produced densities reasonably close to field densities.

It facilitated rapid testing with minimal effort.

It was designed to stress the entire sample rather than just a portion of it.

This appended test was eventually recommended for adoption by the U.S.

WES took the original Marshall Stability Test and added a deformation measurement (using a flow meter) that was reasoned to assist in detecting excessively high asphalt contents. Marshall at the Mississippi Highway Department in 1939. The most promising method eventually proved to be the Marshall Stability Method developed by Bruce G. “…a simple apparatus suitable for use with the present California Bearing Ratio (CBR) equipment to design and control asphalt paving mixtures…” Army Waterways Experiment Station (WES) in 1943 had the objective of developing:

Motivation for this search came from the ever-increasing wheel loads and tire pressures produced by larger and larger military aircraft. Army Corps of Engineers (USCOE) began evaluating various HMA mix design methods for use in airfield pavement design. Lexington, KY.ĭuring World War II, the U.S. Mix Design Methods for Asphalt, 6th ed., MS-02. Development of Marshall Procedures for Designing Asphalt Paving Mixtures, Information Series 84. National Asphalt Pavement Association.National Asphalt Pavement Association Education Foundation. Hot Mix Asphalt Materials, Mixture Design, and Construction. Detailed procedures vary from state-to-state but typical procedures are available in the following documents: This outline emphasizes general concepts and rationale over specific procedures. This section consists of a brief history of the Marshall mix design method followed by a general outline of the actual method. The Marshall method seeks to select the asphalt binder content at a desired density that satisfies minimum stability and range of flow values (White, 1985 ). Currently, the Marshall method is used in some capacity by about 38 states. The basic concepts of the Marshall mix design method were originally developed by Bruce Marshall of the Mississippi Highway Department around 1939 and then refined by the U.S.

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