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Çѱ¹µµ·ÎÇÐȸ / v.8, no.1, 2006³â, pp.77-87
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( Development of Feasible Dynamic Stability in Wheel Tracking Test for Asphalt Concrete Mixtures ) |
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| Dynamic stability (DS) in the wheel tracking (WT) test is used as a basic index of rut-resistance for asphalt mixtures. In general, the deeper rut depth is obtained from the weaker mixture, resulting in the lower DS value. On the other hand, the shallower rut depth is obtained from the stronger mixture, resulting in the higher DS. However, it is not always the case when the DS is calculated by the existing method because the DS is simply determined based on the slope at the final stage of the rut depth-cycle curve. Specifically, in the case of the depth-cycle curve showing a steeper slope in the early part but flatter slope in last part, the DS is calculated to be higher than the curve showing a ever-increasing slope throughout the test. As long as the last part of slope is flatter, the deeper final rut depth is evaluated to show a higher DS than the little final rut depth. Therefore, a reasonable method for DS evaluation need to be established. Several new methods were suggested by considering the early, middle and final parts of rut depth to determine a reasonable DS. The results have shown that those new methods have demonstrated a significant improvement in distinguishing similarly performing mixtures. The result also showed that $DS_2$ had better correlation with SD than any other methods , representing the rutting resistance of asphalt mixture very well. The new DS calculation method is relatively simple and easy to follow. More validatin study is required for practical application. |
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| ÈÙÆ®·¢Å· ½ÃÇè;µ¿Àû¾ÈÁ¤µµ;ħÇϱíÀÌ;±âÁ¸ ¹æ¹ý;»õ·Î¿î ¹æ¹ý;dynamic stability (DS);wheel tracking;rut depth;existing method;new methods;correlation; |
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Çѱ¹µµ·ÎÇÐȸ³í¹®Áý / v.8, no.1, 2006³â, pp.77-87
Çѱ¹µµ·ÎÇÐȸ
ISSN : 1738-7159
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200617033452630)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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