Abstract:

The spreading effects of the pavement with or without the use of transfer cars were tested in whole scope via various methods and were analyzed for the pavements with the spreading widths of 12, 8.75 and 6.25 m. The uniformity of the compacted asphalt pavement surface was then evaluated by using the laser texture depth tester, and the inner uniformity of the pavement was detected by using a non-nuclear density gauge. Moreover, the temperature uniformity of loose-paved hot asphalt mixture was measured by means of infrared thermography. It is found that the non-segregation rates of both the pavement surface and the interior increase with the use of transfer car. It is also revealed by interior segregation appraisal and infrared thermogram that the effect of transfer car in reducing the segregation even exceeds the effect of too-wide spreading , meaning that the transfer car can effectively reduce the temperature segregation.

Key words: asphalt mixture, transfer car, nondestructive test, gradation segregation, temperature segregation