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Çѱ¹µµ·ÎÇÐȸ / v.10, no.2, 2008³â, pp.1-13
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( A Case Study for the Estimation of Remaining Lives of Asphalt Pavements ) |
| ÀÌÁ¤ÈÆ;ÀÌÇöÁ¾;¹ÚÈñ¹®;±èÀÎÅÂ; ;¼¼Á¾´ëÇб³ Åä¸ñȯ°æ°øÇаú;Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø µµ·Î¿¬±¸ºÎ;¸íÁö´ëÇб³ ±³Åë°øÇаú;
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| º» ¿¬±¸¿¡¼´Â ´Ù¾çÇÑ ¾Æ½ºÆÈÆ®Æ÷ÀåÀÇ °ø¿ë¼ö¸íÀ» ¿¹ÃøÇϱâ À§ÇÑ Æ÷Àå»óÅ Æò°¡ÀÇ »ç·Ê¸¦ Á¦½ÃÇÏ¿´´Ù. ARAN(Automatic Road Analyzer)À» ÀÌ¿ëÇÏ¿© ±Õ¿ ¹× ¼Ò¼ºº¯Çü °¨°ú °¨Àü Æ÷ÀåÀÇ Ç¥¸éÆÄ¼Õ ÇöȲ¿¡ ´ëÇÑ Á¶»ç¸¦ ½Ç½ÃÇϰí HPCI(Highway Pavement Condition Index)¸¦ »êÁ¤ÇÏ¿´´Ù. Æ÷Àå ÆÄ¼ÕÇöȲÀ» ºÐ¼®ÇÑ °á°ú °¡Àå ºó¹øÇÑ ÇüÅÂÀÇ ÆÄ¼ÕÀº Top-down ±Õ¿·Î ³ªÅ¸³µ´Ù. FWD(Falling Weight Deflectometer)·ÎºÎÅÍ ÃøÁ¤ÇÑ Ã³Áüµ¥ÀÌÅ͸¦ »ç¿ëÇÏ¿© Æ÷ÀåÀÇ Åº¼º°è¼ö¸¦ ¿ª»êÁ¤ÇÏ¿© ½Ç³»¿¡¼ ±¸ÇÑ µ¿Åº¼º°è¼ö¿Í ºñ±³ÇÏ¿´´Ù. ±× °á°ú¸¦ ¿ªÇÐÀû-°æÇèÀû ¹æ¹ý°ú AASHTO 93 ¼³°è¹ý¿¡ Àû¿ëÇÏ¿© Æ÷ÀåÀÇ ÁöÁö·ÂÀ» Æò°¡ÇÏ¿´À¸¸ç, ÁöÁö·ÂÀº ¼³°è¼ö¸í µ¿¾È ÃæºÐÇÑ °ÍÀ¸·Î Æò°¡µÇ¾ú´Ù. ÇöÀç Æ÷ÀåÀÇ ÁÖµÈ ÆÄ¼ÕÀº Ç¥ÃþºÎÀÇ Top-down ±Õ¿À̹ǷΠÆ÷Àå»óÅ Æò°¡·Î °è»êµÈ HPCI¿Í ±âÁ¸ °ø¿ë¼º ÀÚ·á¿¡ ±Ù°ÅÇÏ¿© Æ÷ÀåÀÇ ÀÜÁ¸¼ö¸íÀ» ¿¹ÃøÇÏ¿´´Ù. Æ÷Àå»óÅ Æò°¡¿Í ÇÔ²² Æ÷ÀåÀÇ Á¶±âÆÄ¼Õ ¿øÀκм®À» À§ÇØ ´ë»ó±¸°£ÀÇ ÄÚ¾î ½ÃÆíÀ» äÃëÇÏ¿© °ø±Ø·ü, ÀÔµµ, ¾Æ½ºÆÈÆ® ÇÔ·®, ÇÇ·ÎÀúÇ×¼º µîÀÇ ¹°¼ºÀ» ÃøÁ¤ÇÏ¿´´Ù. ¹ÙÀδõ¸¦ Å¿ö ¾Æ½ºÆÈÆ® ÇÔ·®À» ÃøÁ¤ÇÏ´Â ¹æ¹ýÀº ÇöÀå½Ã·áÀÇ °æ¿ì ºÎÁ¤È®ÇÑ °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ½Ç³»½ÃÇè°á°ú Á¶±â ±Õ¿ÀÌ ¹ß»ýÇÑ °¡Àå Å« ÀÌÀ¯´Â ´ÙÁüºÎÁ·°ú °ñÀçÀÇ ÀÔµµ ºÎÁ¤È® µî ½Ã°ø½ÃÀÇ Ç°Áú°ü¸®°¡ ¹ÌÈíÇÑ °ÍÀÌ ÁÖµÈ ¿øÀÎÀ¸·Î ³ªÅ¸³µ´Ù. |
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| This study presents a case study of condition evaluation of various asphalt pavement sections to estimate performance lives. The pavement surface conditions including cracking and rutting are first evaluated using a automatic pavement analyzer, ARAN. HPCI(Highway Pavement Condition Index) values are estimated using the pavement surface distress data. It is observed from the pavement distress survey that the major distress type of the sections is top-down cracking. The modulus value of each pavement layer is back-calculated from the defection data obtained from a FWD(Falling Weight Deflectometer) and compared with the laboratory measured dynamic modulus values. Remaining lives of the various pavement sections are estimated based on a mechanistic-empirical approach and AAHTO 1993 design guide. The structural capacities of the all pavement sections based on the two approaches are strong enough to maintain the pavement sections for the rest of design life. Since the major distress type is top-down cracking, the remaining lives of the pavement sections are estimated based on HPCI and existing performance database of highway pavements. To evaluate the causes of premature pavement distress, various material properties, such as air void, asphalt binder content, aggregate gradation, dynamic modulus and fatigue resistance, are measured from the field cores. It is impossible to accurately estimate the binder contents of field samples using the ignition method. It is concluded from the laboratory tests that the premature top down cracking is mainly due to insufficient compaction and inadequate aggregate gradation. |
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| °£Á¸¼ö¸í;Ç¥¸é±Õ¿;ARAN;HPCI;FWD;remaining life;top-down cracking; |
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Çѱ¹µµ·ÎÇÐȸ³í¹®Áý / v.10, no.2, 2008³â, pp.1-13
Çѱ¹µµ·ÎÇÐȸ
ISSN : 1738-7159
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200824556528973)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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