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Çѱ¹µµ·ÎÇÐȸ / v.12, no.2, 2010³â, pp.99-106
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Falling Weight Deflectormeter¸¦ ÀÌ¿ëÇÑ µ¿»ó¹æÁöÃþÀÇ ±¸Á¶Àû Ư¼º ºÐ¼®
( Structural assessment of Anti-Freezing Layer with use of Falling Weight Deflectormeter Deflection ) |
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| Until now, the thickness design of anti-freezing layer has been empirically conducted using the frost depth determined from the freezing index. This approach cannot consider the structural properties of anti-freezing layer, which can cause the over-design of pavement structure. This paper presents results of structural evaluation of anti-freezing layer using the Falling Weight Deflectormeter (FWD) deflections. The FWD testing was directly conducted on top of the subbase layer located at the embankment, cutting, and boundary area of each section. It is observed from this testing that the center deflections of pavement structure with anti-freezing layer are smaller than those without anti-freezing layer. The deflection reduction rates are 15~55% in the embankment, 11~64% in the cutting, and 2~38% in the boundary, respectively. It was also found that the use of antifree zing layer enables to reduce the Surface Curvature Index (SCI) values up to 24 percent. Fatigue lives show that pavement structure with antifreezing layer are about two times higher than the those without anti-freezing layer. This fact indicates that the anti-freezing layer should be considered as a structural layer in the asphalt pavement system. |
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| µ¿»ó¹æÁöÃþ;óÁü·®;anti-freezing;FWD;deflection; |
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Çѱ¹µµ·ÎÇÐȸ³í¹®Áý / v.12, no.2, 2010³â, pp.99-106
Çѱ¹µµ·ÎÇÐȸ
ISSN : 1738-7159
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201023064629253)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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