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Publication Details

Laboratory Evaluation of the PQI Model 300

General Interest: provides practical guidance to engineers responsible for the day-to-day design, construction, rehabilitation, maintenance, and management of pavements. Research/Reference: useful for researchers doing further work in the pavement area as well as those developing improved testing and design procedures. Includes documents of historical value.

Primary Topic: Materials-Asphalt

Description: During construction of hot-mix asphalt pavements, density measurements are taken at various stages to monitor the effect of the rollers and ensure proper compaction. The most commonly used method of measurement is the nuclear density gauge. The nuclear density gauge requires licensing, training, and specialized storage due to the radioactive source contained within the gauge. An alternative method that does not require a radioactive source is desired. The Pavement Quality Indicator (PQI) has the potential to be such method. Thus, research to determine the capabilities and accuracy of this non-nuclear gauge currently on the market is needed.

FHWA Publication Number:

Publication Year: 2000

Document Links: PDF (file size: 0.1 mb)

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Updated: 02/20/2015

United States Department of Transportation - Federal Highway Administration