Investigation of Electromagnetic Gauges for Determining In-Place HMA Density, Final Report, May 2007

(2007) Investigation of Electromagnetic Gauges for Determining In-Place HMA Density, Final Report, May 2007. Transportation, Department of

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Abstract

Density is an important component of hot-mix asphalt (HMA) pavement quality and long-term performance. Insufficient density of an in-place HMA pavement is the most frequently cited construction-related performance problem. This study evaluated the use of electromagnetic gauges to nondestructively determine densities. Field and laboratory measurements were taken with two electromagnetic gauges—a PaveTracker and a Pavement Quality Indicator (PQI). Test data were collected in the field during and after paving operations and also in a laboratory on field mixes compacted in the lab. This study revealed that several mix- and project-specific factors affect electromagnetic gauge readings. Consequently, the implementation of these gauges will likely need to be done utilizing a test strip on a project- and mix-specific basis to appropriately identify an adjustment factor for the specific electromagnetic gauge being used for quality control and quality assurance (QC/QA) testing. The substantial reduction in testing time that results from employing electromagnetic gauges rather than coring makes it possible for more readings to be used in the QC/QA process with real-time information without increasing the testing costs.

Item Type: Newsletter
Keywords: Transportation, PQI Electromagnetic Gauges,
Subjects: Transportation > Research
Transportation > Roads and highways
Transportation > Design and Construction
Transportation
ID Code: 13612
Deposited By: Margaret Barr
Deposited On: 21 Aug 2012 20:41
Last Modified: 21 Aug 2012 20:41
URI: http://publications.iowa.gov/id/eprint/13612

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