Since the identification of segregation on asphalt pavements has been based on visual observations in Taiwan, it is essential to develop a quantitative method to detect presence and severity of segregation. The non-nuclear density device was selected for the field measurements at nine test sites, and cores were taken for laboratory testing. The non-nuclear density difference between segregated and control areas was found to increase with increasing the segregation severity. For medium or heavy segregated areas, the non-nuclear density difference was more than 90 kg/m3. Analyses of the results showed that there was a significant increase in surface texture depth of segregated areas as compared to control areas. In medium or heavy segregated areas, the air voids increased by 20% and the indirect tensile strength decreased by 8% as compared to the control area. The criterion to detect segregation was based on the statistical differences in non-nuclear measured density values with a p-value 0.05. If a statistical difference in non-nuclear density between segregated and control areas existed, the chance of aggregate gradation difference in percent passing the 3/8", No. 4 and No. 8 sieves for medium and heavy segregation was 78% and 64%, respectively.
|出版狀態||Published - 2007 一月 1|
|事件||5th International Conference on Maintenance and Rehabilitation of Pavements and Technological Control, MAIREPAV 2007 - Park City, United States|
持續時間: 2007 八月 8 → 2007 八月 10
|Other||5th International Conference on Maintenance and Rehabilitation of Pavements and Technological Control, MAIREPAV 2007|
|期間||07-08-08 → 07-08-10|
All Science Journal Classification (ASJC) codes