RECYCLING OF ASPHALT PAVEMENTS-AN OVERVIEW OF CURRENT PRACTICES

Recycling of asphalt pavements increased markedly in the mid 1970s, when the Arab oil embargo caused inflation of construction costs and new recycling equipment was developed. This paper gives a brief overview of the current practices utilized in recycling asphalt pavements. Five recycling methods: 1) cold planing, 2) hot recycling (at plant), 3) hot-in-place recycling, 4) cold in-place recycling, and 5) full depth reclamation are covered. Strategies for selecting an appropriate recycling method are outlined. Other topics discussed include: recycling specifications used by various user agencies and structural design of recycled pavements.