Journal Published Online: 17 July 2009
Volume 37, Issue 5

Investigation on the Bulk Performance and Microstructure of Emulsion-Based, Cold In-Place Recycling Mixtures

CODEN: JTEVAB

Abstract

Cold in-place recycling (CIR) using asphalt emulsion is a cost-effective method for the preventive and corrective maintenance of existing pavements. The objectives of this study were to evaluate the recycling mixture’s macroscopic performance and to analyze the microstructure of the mastics using a scanning electron microscope (SEM). The overall performance of the recycling material was evaluated for retained stability, immersed freeze-thaw indirect tension tests, and rut testing. Additionally, the surface micro-profiles of three mastic classes were analyzed using SEM. The results of the bulk property analyses indicated that the addition of cement improved the performance of the recycling mixtures. The SEM analyses showed that cement has an effect similar to fiber-reinforcement in cement-treated asphalt emulsion CIR mixtures. Further, the results indicated that the mechanism of cement action is consistent with the results of the overall mixture performance properties.

Author Information

Yan, Jinhai
School of Transportation, Southeast Univ., Nanjing, Jiangsu Province, People’s Republic of China
Ni, Fujian
School of Transportation, Southeast Univ., Nanjing, Jiangsu Province, People’s Republic of China
Jia, Jonathan
Shell (China), Limited, Chao Yang District, Beijing, People’s Republic of China
Tao, Zhuohui
Shanghai Application Center, MeadWestvaco Corporation, People’s Republic of China
Pages: 6
Price: $25.00
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Stock #: JTE000344
ISSN: 0090-3973
DOI: 10.1520/JTE000344