One of the functions of asphalt emulsions is to rejuvenate the surface of an aged asphalt concreteroadway. 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 performanceof the asphalt emulsion. Using asphalt concrete beams from the surface of a roadway in theBending Beam Rheometer, however, can give an indication of an asphalt emulsion’s ability todecrease the stiffness and affect the creep rate or change in stiffness (m-value) of the roadwaysamples. Seven emulsions at three application rates on two roadways were examined to identifythe effect of emulsion on the stiffness and m-value of asphalt concrete. There was no easilyidentified difference between the three application rates for either field section or any of theemulsions. However, the m-value tended to increase with the addition of emulsion and thestiffness tended to decrease. This indicates that the BBR can be used to determine the effect ofasphalt emulsion on the creep change and the stiffness of field samples in the Bending BeamRheometer.
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