Mix design method of asphalt rubber open-graded friction course and its application in overlay

作者：Bai Qifeng; Qian Zhendong^*; Cao Rongji

来源：Journal of Southeast University (english Edition), 2009, 25(3): 395-399.

• Arizona
• Asphalt content
• Asphalt rubber
• Estimating method
• Key technologies
• Marshall test
• Mix designs
• Open-graded friction course
• Tack coat

The mix design method of asphalt rubber open-graded friction course(AR-OGFC) by the Marshall test and key technologies of AR-OGFC overlay are studied. Based on the draindown test, the stripping test and the Marshall test by different beating times, the asphalt content estimating method and Marshall beat criterion are studied. It is found that the asphalt content of AR-OGFC can be estimated by the formula of Arizona, and the proper Marshall test criterion for AR-OGFC is 50 beats on both sides. By analyzing the influence of gradation on OGFC performance, the gradation of AR-OGFC is recommended, and the amount of aggregate passing 4. 75 mm should be minimized for AR-OGFC. Through investigation of AR-OGFC overlay projects, key technologies such as the treatment of underlying pavement and the selection of tack coat are advanced, and modified emulsified asphalt should be used in AR-OGFC overlay tack coat.

• 出版日期2009
• 单位东南大学