01476130

Component

One of the functions of asphalt emulsions is to rejuvenate the surface of an aged asphalt concrete roadway. However, it is unclear as to the effectiveness of different types of asphalt emulsions, as most current testing is empirical in nature and does not give an indication of the performance of the asphalt emulsion. Using asphalt concrete beams from the surface of a roadway in the Bending Beam Rheometer (BBR), however, can give an indication of an asphalt emulsion’s ability to decrease the stiffness and affect the creep rate or change in stiffness (m-value) of the roadway samples. Seven emulsions at three application rates on two roadways were examined to identify the effect of emulsion on the stiffness and m-value of asphalt concrete. There was no easily identified difference between the three application rates for either field section or any of the emulsions. However, the m-value tended to increase with the addition of emulsion and the stiffness tended to decrease. This indicates that the BBR can be used to determine the effect of asphalt emulsion on the creep change and the stiffness of field samples in the Bending Beam Rheometer.

This paper was sponsored by TRB committee AFK20 Characteristics of Asphalt Materials.

01470560

13-4384

English

15p

2013

Transportation Research Board 92nd Annual Meeting

Digital/other

Figures; References; Tables

Asphalt concrete; Asphalt emulsions; Beams; Creep properties; Rheometers; Stiffness

Bending beam tests

Highways; Materials; Pavements; I31: Bituminous Binders and Materials; I32: Concrete

Transportation Research Board Annual Meeting 2013 Paper #13-4384

TRIS, TRB, ATRI

Feb 5 2013 12:51PM