Evaluation of asphalt mixtures containing Sasobit® warm mix additive

Document Type

Conference Proceeding

Publication Date

12-1-2008

Abstract

This paper presents field and laboratory performance of conventional hot mix asphalt mixture and mixture containing warm mix additive named Sasobit®. The laboratory evaluation included indirect tensile strength test (ITS), Hamburg-type loaded wheel tracking test (LWT), Dynamic modulus (E*) test, and Semi-Circular Bend (SCB) Test. Test results indicated that the ITS of Sasobit® modified mixture was significantly lower than the conventional mixture. However, the fracture resistance, as determined from the critical value of J-integral of the SCB test, of the conventional mixture was slightly lower that the Sasobit® modified mixture. Sasobit® modified mixture exhibited lower modulus values, E*, than the conventional mixture. This difference between the conventional and the Sasobit® modified moduli decreased as the temperature increased, indicating that the modulus was minimally affected at higher temperature due to the Sasobit® modification. In this limited evaluation, the moisture susceptibility of both mixtures was similar. The rut depth, as measured from the LWT test, of Sasobit® modified mixture was slightly lower that the rut depth of the conventional mixture. Copyright ASCE 2008.

Publication Source (Journal or Book title)

Geotechnical Special Publication

First Page

1016

Last Page

1023

This document is currently not available here.

Share

COinS