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http://dx.doi.org/10.12652/Ksce.2011.31.6D.803

A Study on the Performance Evaluation Method of Warm-mix Asphalt Mixture by the Analysis of Bonding Properties between Asphalt Binder and Aggregate  

Yoo, In Sang (국토해양부)
Cho, Dong-Woo (한국건설기술연구원)
Hwang, Sung Do (한국건설기술연구원)
Rhee, Suk Keun (경희대학교 토목공학과)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.31, no.6D, 2011 , pp. 803-810 More about this Journal
Abstract
The public interest of global warming and energy shortage is gradually increased, and the related industries also have become interested in developing eco-friendly material and technology. Warm-mix asphalt (WMA) is a result of the developments to alleviate global warming and energy problems. This WMA is produced at lower temperatures than the temperature at which hot mix asphalt (HMA) is produced. Because most tests in Superpave are developed only for the performance and maintenance of HMA produced by hot temperatures, it is difficult for the tests to identify properly the material properties and then evaluate the performances between HMA and WMA. This study deals with the development of a new protocol to differentiate HMA and WMA performance, and especially the interfacial properties between asphalt and aggregate are targeted as the performance indicator; thus, an evaluation method and guideline are suggested. The concept and idea of the test method applied in this study were modified from the DSR moisture damage test protocol. In addition, TSR test was performed to affirm the relation between the asphalt-aggregate interface and the asphalt-aggregate mixture performances. The followings are the results of this study. Shear stress at 85% linear visco-elastic complex modulus (LVE $G^*$) can be a better parameter than LVE $G^*$, which can assess the interfacial or bonding performance between asphalt and aggregate. Moreover, measuring the bonding performance in thinner film thicknesses will be a better way to evaluate the real and field situation between asphalt and aggregate. The interfacial properties' criteria to apply the newly developed test and parameter should be developed, after the asphalt mixture criteria relating to the interfacial properties are completed.
Keywords
warm-mix asphalt; DSR; film thickness; ARES; $G^*$; shear stress;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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