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Mathematical Problems in Engineering
Volume 2015, Article ID 797808, 13 pages
Research Article

Mathematical Approach in Rheological Characterizing of Asphalt Emulsion Residues

1Department of Civil, Construction, and Environmental Engineering, North Carolina State University, Campus Box 7908, 2501 Stinson Drive, Raleigh, NC 27695, USA
2Highway Pavement Research Division, Korea Institute of Civil Engineering and Building Technology (KICT), Daehwa-Dong 283, Goyangdae-ro, Ilsanseo-gu, Goyang-si, Gyeonggi-do 411-712, Republic of Korea

Received 3 October 2014; Accepted 24 December 2014

Academic Editor: Woo-Young Jung

Copyright © 2015 Seong Hwan Cho and Jeong Hyuk Im. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Three different emulsion residues, such as SS1HP, HFE90, and SS-1VH (trackless), and a base asphalt binder (PG 64-22) are compared to characterize rheological properties by using DSR test. In order to capture the emulsion properties, different frequencies (from 1 to 100 rad/sec at a 10% constant shear rate) and temperatures (from −45°C to 75°C with 15°C increments) were applied. Then, a master curve for shear modulus was plotted for each emulsion. The transition of the HFE90 emulsion from viscous to elastic behavior occurs at lower temperatures, compared to the other materials. This emulsion is known for performing in a wider temperature range as shown in the results. The trackless emulsion presents an elastic behavior at intermediate temperatures. This product is known as having very fast setting and high resistance to shear stresses. The trackless emulsion presents the highest viscous and elastic modulus, followed by the PG 64-22 binder, SS1HP, and HFE90 emulsion. Shear strength test results show a behavior between trackless emulsion and SS1HP similar to the frequency sweep test results performed by DSR.