Abstract:

Dry and immersion split tests with different cement sequences were carried out, in which performances of semi-flexible recycled mixtures might be affected. The properties of mixtures were based on the compaction test method, the Marshall test method and performance evaluation. A design procedure which included original material selection, gradation design and performance evaluation was proposed. The results first indicated that semi-flexible recycled mixtures with added cement had a denser structure and good moisture stability. Also, semi-flexible recycled mixtures had good high temperature stability, moisture stability, resistance drying shrinkage and temperature shrinkage. The actual project showed that semi-flexible recycled technology had an economic and environmental significance and the application deserved promotion.

Key words: pavement maintenance engineering, semi-flexible recycled asphalt mixture, modified emulsified asphalt, pavement performanc