This paper describes development of an automated technology to quantify surface segregation seen during construction of hot mix asphalt concrete pavements. Segregation manifested on the surface produces nonuniform surface macrotecture. A laser-based system was used for detection of nonuniform surface macrotexture caused by segregation. Two segregated test sections and a control test section were tested to evaluate the laser texture method. Laser texture data were gathered from three sites, and sand patch and nuclear density tests were performed at 25 ft (7.62 m) intervals along three sections. In addition to the above, visual surveys were performed to confirm the measurements. Based on the test results, it was found that the nuclear density test could not be used to detect surface segregation but it could be used as a confirmation test. Test results from the control section were used to establish a correlation between the sand patch tests and the laser texture data.
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