Research Reports

Recycled Asphalt Pavement (RAP) Effects on Binder and Mixture Quality

Principal Investigator:

Xinjun Li, Timothy R Clyne, Mihai O Marasteanu

July 2004

Report no. Mn/DOT 2005-02

Projects: Recycled Asphalt Pavement (RAP) Effects of Binder and Mixture Quality

Topics: Pavement design for cold climates

This report looks at how Recycled Asphalt Pavement (RAP) has been used in Minnesota for over 25 years. The most commonly used method is to mill material from an existing pavement and incorporate it into a new asphalt mix. Previous experience and specifications allow various RAP percentages depending on the traffic level. Past research has also shown the effects of RAP on both the high- and low-temperature properties of asphalt cement and the asphalt mixtures. Therefore, it becomes an important priority to study and determine the effects various types and percentages of RAP have on the asphalt cement and mixture quality. This will result in a rational design for asphalt mixture that contain RAP and could change Mn/DOT's asphalt specification.

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