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Çѱ¹µµ·ÎÇÐȸ / v.3, no.1, 2001³â, pp.185-197
Æ÷¾Æ½¼ ºñÀÇ º¯È­¸¦ °í·ÁÇÑ ¼öÁ¤ ECM ¸ðµ¨ °³¹ß ¹× ¾Æ½ºÆÈÆ® ÄÜÅ©¸®Æ®ÀÇ Àú¿Â Ư¼º ¿¬±¸
( Development of Modified Effective Crack Model to Take into Account for variation of Poisson's ratio and Low-Temperature Properties of Asphalt Concrete )
±Ç½ÂÁØ;µµ¿µ¼ö;±è±¤¿ì; »ïô´ëÇб³ Åä¸ñ°øÇаú;°­¿ø´ëÇб³ ¼®À纹ÇսżÒÀçÁ¦Ç°¿¬±¸¼¾ÅÍ;°­¿ø´ëÇб³ ³ó°øÇаú;
 
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º» ¿¬±¸´Â ¿Âµµ¿¡ µû¶ó Ư¼ºÀÌ º¯ÇÏ´Â ¾Æ½ºÆÈÆ® ÄÜÅ©¸®Æ®ÀÇ ÆÄ±«ÀμºÀ» ±Ô¸íÇϱâ À§ÇÏ¿© ±âÁ¸ÀÇ À¯È¿±Õ¿­ ¸ðµ¨À» ¼öÁ¤ÇÏ´Â ¿¬±¸¸¦ ´Ù·ç°í ÀÖ´Ù. º»·¡ÀÇ ECM¸ðµ¨Àº ÄÜÅ©¸®Æ®¿Í °°Àº °íü¿¡ Àû¿ëµÇµµ·Ï °³¹ßµÇ¾î Àç·áÀÇ Æ÷¾Æ½¼ ºñ¸¦ °í·ÁÇÏÁö ¾Ê´Â´Ù. ÇÏÁö¸¸ ¾Æ½ºÆÈÆ® ÄÜÅ©¸®Æ®´Â ¿Âµµº¯È­¿¡ ¹Î°¨ÇÏ¿© ¿Âµµ¿¡ µû¶ó Æ÷¾Æ½¼ ºñ°¡ º¯È­ÇϹǷΠ´Ù¾çÇÑ ¿ÂµµÇÏ¿¡¼­ Á¤È®ÇÑ ÆÄ±« Ư¼ºÀ» ¾Ë±â À§Çؼ­´Â Æ÷¾Æ½¼ ºñ°¡ °í·ÁµÇ¾îÁ®¾ß ÇÑ´Ù. 3°³ÀÇ °³Áú¾Æ½ºÆÈÆ® °áÇÕÀ縦 Æ÷ÇÔÇÑ 4°¡Áö °áÇÕÀ縦 »ç¿ëÇÏ¿© ¹ÐÀÔµµ ¾Æ½ºÆÈÆ® È¥ÇÕ¹°À» Á¦Á¶ÇÏ¿© Ãʱâ±Õ¿­ º¸¿¡ ´ëÇÑ 3Á¡ ÈÚ ½ÃÇèÀ» $-5^{circ}C$ºÎÅÍ $-35^{circ}C$±îÁö¿¡¼­ ¼öÇàÇÏ¿´´Ù. ź¼º°è¼ö, ÈÚ°­µµ ¹× ÆÄ±«ÀμºÀ» ½ÃÇèÀ» ÅëÇÏ¿© ±¸ÇÏ¿´´Ù. ½ÃÇè°á°ú Æ÷¾Æ½¼ºñ°¡ °í·ÁµÇ´Â ¼öÁ¤ ECM °ø½ÄÀ» »ç¿ëÇϹǷμ­ º¸´Ù Á¤È®ÇÑ °ªµéÀ» ¾òÀ» ¼ö ÀÖ¾ú´Ù. Æú¸®¸Ó °³Áú ¾Æ½ºÆÈÆ® È¥ÇÕ¹°ÀÌ ÀϹݾƽºÆÈÆ® È¥ÇÕ¹°¿¡ ºñÇÏ¿© ´õ ³·Àº Àú¿ÂÇÏ¿¡¼­ ´õ ³ôÀº °­¼º°ú ÆÄ±«ÀμºÀ» À¯ÁöÇÔÀ» ¾Ë ¼ö ÀÖ¾ú´Ù.
This paper dealt with modification of effective crack length model (ECM) by adding Poisson's ratio term to evaluate fracture toughness of asphalt concrete which varies its material property by temperature. The original ECM model was developed for solid materials, such as cement concrete, and Poisson's ratio of materials was not considered. However, since asphalt concrete is sensitive to temperature variation and changes its Poisson's ratio by temperature, it should be taken into consideration to know exact fracture property under various temperatures. Four binders, including 3 polymer-modified asphalt (PMA) binders, were used to make a dense-grade asphalt mixture and 3-point bending test was peformed on notched beam at low temperatures, from -5oC to 35oC. Elastic modulus, flexural strength and fracture toughness were obtained from the test. The results showed that, since Poisson's ratio was considered, the more accurate test values could be obtained using modified ECM equation than original ECM. PMA mixture showed higher stiffness and fracture toughness than normal asphalt mixture under very low temperatures.
 
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À¯È¿±Õ¿­¸ðµ¨;Æ÷¾Æ½¼ ºñ;ÆÄ±«Àμº;¾Æ½ºÆÈÆ® ÄÜÅ©¸®Æ®;Æú¸®¸Ó °³Áú ¾Æ½ºÆÈÆ®;ź¼º °è¼ö;ÈÚ°­µµ;Effective crack length model;Poisson's ratio;Fracture toughness;Asphalt concrete;Polymer-modified asphalt;Elastic modulus;Flexural strength;
 
Çѱ¹µµ·ÎÇÐȸ³í¹®Áý / v.3, no.1, 2001³â, pp.185-197
Çѱ¹µµ·ÎÇÐȸ
ISSN : 1738-7159
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200115637534645)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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