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Çѱ¹µµ·ÎÇÐȸ / v.11, no.1, 2009³â, pp.135-144
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( Development of Fracture Energy Measurement System of Asphalt Mixture Using Marshall Tester )
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º» ¿¬±¸´Â ¸¶¼£ ½ÃÇè±â¸¦ ÀÌ¿ëÇÏ¿© ¾Æ½ºÆÈÆ® È¥ÇÕ¹°ÀÇ ±Õ¿­ÀúÇ×¼ºÀ» Æò°¡ÇÒ ¼ö ÀÖ´Â º¸´Ù °£ÆíÇϰí ÇÕ¸®ÀûÀÎ ÃøÁ¤½Ã½ºÅÛÀ» °³¹ßÇϴµ¥ ¸ñÀûÀÌ ÀÖ´Ù. ±Õ¿­ÀúÇ×¼º Æò°¡¸¦ À§ÇÑ ÆÄ¶ó¸ÞŸ·Î¼­ ÆÄ±«¿¡³ÊÁö¸¦ ÀÌ¿ëÇÏ¿´´Ù. ¸¶¼£ ½ÃÇè±â´Â ±âº»ÀûÀ¸·Î °ø½Ãü ¿ÜºÎ¿¡ °ÅÄ¡ÇÑ LVDT¸¦ ÀÌ¿ëÇÏ¿© ¼öÁ÷º¯Çü·üÀ» ÃøÁ¤ÇÏ´Â ½Ã½ºÅÛÀ̸ç, ÀÌ °°Àº ¿ÜºÎ ¼öÁ÷º¯Çü·ü ÃøÁ¤¹æ½ÄÀº ÇÏÁß ½ºÆ®·¦ ºÎºÐ¿¡¼­ ¹ß»ýÇÏ´Â ±¹ºÎÀûÀÎ º¯ÇüÀ¸·Î ÀÎÇØ ÃøÁ¤¿ÀÂ÷¸¦ ¾ß±âÇÒ °¡´É¼ºÀÌ ÀÖ´Ù. µû¶ó¼­ Ãß°¡ÀûÀÎ °èÃø ½Ã½ºÅÛÀ» ¼³Ä¡ÇÏÁö ¾Ê°í ±âº»ÀûÀÎ ¸¶¼£ ½ÃÇè±â¸¦ ÀÌ¿ëÇÏ¿© È¥ÇÕ¹°ÀÇ ÆÄ±«¿¡³ÊÁö¸¦ ÃøÁ¤Çϱâ À§Çؼ­´Â °ø½Ãü ¿ÜºÎ¿¡ °ÅÄ¡ÇÑ LVDT¸¦ ÀÌ¿ëÇÑ ¼öÁ÷º¯Çü·ü ÃøÁ¤°ªÀÌ ÆÄ±«¿¡³ÊÁö »êÁ¤¿¡ Àû¿ë°¡´ÉÇÑÁö ¿©ºÎ¸¦ °ËÁõÇÏ¿©¾ß ÇÑ´Ù. À̸¦ À§ÇØ º» ¿¬±¸¿¡¼­´Â °ø½Ãü Á߾Ӻκп¡¼­ÀÇ ¼öÆòº¯Çü·ü°ú ¿ÜºÎ¿¡ °ÅÄ¡ÇÑ LVDT¸¦ ÀÌ¿ëÇÑ ¼öÁ÷º¯Çü·üÀ» ÃøÁ¤ÇÏ´Â µÎ °¡Áö ¹æ½ÄÀÇ °£Á¢ÀÎÀå°­µµ½ÇÇèÀ» ¼öÇàÇÏ¿© ±× Â÷À̸¦ ºñ±³ ºÐ¼®ÇÏ¿´´Ù. ½ÇÇè°á°ú, ¿ÜºÎ ¼öÁ÷º¯Çü·ü ÃøÁ¤ÀÇ ¹®Á¦Á¡À¸·Î ÁöÀûµÇ¾ú´ø ÇÏÁß ½ºÆ®·¦ ºÎºÐ¿¡¼­ ¹ß»ýÇÏ´Â ±¹ºÎÀûÀÎ º¯ÇüÀº ÆÄ±«½ÃÁ¡ ÀÌÀü¿¡´Â ±ØÈ÷ ÀûÀº °ÍÀ¸·Î ³ªÅ¸³ª ÆÄ±«¿¡³ÊÁö °è»ê¿¡ ¿ÀÂ÷¸¦ À¯¹ßÇÏÁö ¾ÊÀ½À» º¸¿©ÁÖ¾ú´Ù. ¶ÇÇÑ ¿ÜºÎ ¼öÁ÷º¯Çü·ü ÃøÁ¤ÀÇ ½ÇÇ躯µ¿¼ºÀ» È®ÀÎÇÑ °á°ú, º¯µ¿°è¼ö°¡ 15% ÀÌÇÏ·Î ¸¶¼£½ÃÇè±â¸¦ ÀÌ¿ëÇÑ ±Õ¿­ÀúÇ×¼º Æò°¡½Ã½ºÅÛ¿¡ ÀÌ¿ë °¡´ÉÇÔÀ» ¾Ë ¼ö ÀÖ¾ú´Ù.
The purpose of this study is to develop a simple and rational crack evaluation system using Marshall tester. Fracture energy were used as a parameter to evaluate the crack resistance of asphalt mixtures. Marshall tester basically measures the vertical deformation obtained from the linear variable differential transformer(LVDT) attached on the specimen's exterior, which can cause a measurement error due to the local deformation near the loading head. Therefore, the validity of the measurement system of Marshall tester should be tested to use it in calculation of fracture energy. Two types of indirect tensile strength tests were performed using four types of asphalt mixtures at two temperature conditions. From the tests, it was shown that local deformation near the loading head had not occurred before a specimen was fractured, so that it did not cause the measurement error of fracture energy. And also from the statistic analysis, the coefficient of variation of vertical deformation measurements obtained on specimen's exterior is less than 15%. Thus, vertical deformation measurements obtained on the specimen's exterior can be used in crack evaluation system using Marshall tester.
 
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Çѱ¹µµ·ÎÇÐȸ³í¹®Áý / v.11, no.1, 2009³â, pp.135-144
Çѱ¹µµ·ÎÇÐȸ
ISSN : 1738-7159
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200911850421604)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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