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http://dx.doi.org/10.5389/KSAE.2019.61.3.043

Feasibility of Estimating Rut Resistance of SMA Mixture by Static Loading Test Using Confined Specimen  

Kim, Sungun (Department of Regional Infrastructure Engineering, Kangwona National University)
Choi, Chang-jeong (Department of Regional Infrastructure Engineering, Kangwona National University)
Kim, Kwang W. (Department of Regional Infrastructure Engineering, Kangwona National University)
Publication Information
Journal of The Korean Society of Agricultural Engineers / v.61, no.3, 2019 , pp. 43-53 More about this Journal
Abstract
It is well-known fact that the stone-mastic asphalt (SMA) mixture has shown superior rut resistance, compared with the dense-graded asphalt (DGA) mixture in highway pavements. However, the SMA is measured to be inferior to DGA mixes when tested by well-known high-temperature test methods, such as the wheel tracking (WT), asphalt pavement analyzer, the Marshall Stability and Kim Test. Therefore, this study examined the reasons why it was measured to be inferior, and devised a potential procedure by which the superiority of SMA could be measured at $60^{\circ}C$. The strength against deformation ($S_D$), which was known to show very high correlation with WT results for DGA mixes, was measured by the Kim Test on the specimen confined in the compacted mold. In standard Kim Test, which used the specimen without confinement, the DGA was measured to show higher $S_D$ than the SMA. But by confining specimen, it was found that the $S_D$ of SMA was measured to be higher than that of DGA. Therefore, the confined static test protocol devised in this study was found to be feasible for evaluating rut resistance of SMA mix.
Keywords
Stone mastic asphalt (SMA); deformation strength ($S_D$); rut; vertical deformation; wheel tracking; confined specimen; Kim test;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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