Green pavement technologies include innovative pavement materials as well as pavement rehabilitation methodologies. Some of materials such as the use of RAP and RAS and crumb rubber in HMA are included in this paper. On the pavement rehabilitation side green technologies have included pavement recycling such as hot in-place recycling, cold in-place recycling, full depth reclamation, stabilization of soils, concrete pavement rubblization, and concrete pavement restoration.
The purpose of this paper is to bring attention to the importance of the technical quality of green asphalt technologies. Although there are a large number of cases where they are used correctly, there is also a growing number of applications that have sometimes serious negative impact on pavement performance. It is critical that when green technologies are applied it is certain that they do not compromise the pavement performance and that proper quality procedures for material production, pavement and mix design and construction are known and followed. This paper describes some recycling failures and examples of poorly performing new pavements. Green asphalt pavement technologies are sustainable only if they deliver acceptable performance.
