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Çѱ¹µµ·ÎÇÐȸ / v.2, no.3, 2000³â, pp.129-144
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°ñÀçÀÇ ÀÔµµ¿Í SBS °³ÁúÀç°¡ ¾Æ½ºÆÈÆ® È¥ÇÕ¹°ÀÇ Á¡Åº¼º ¹°¼º ¹× ÇÇ·Î °ø¿ë¼º¿¡ ¹ÌÄ¡´Â ¿µÇâ
( The Effects of Aggregate Gradations and SBS Modifier on the Viscoelastic Properties and Fatigue Performance of Asphalt Mixtures ) |
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| °ñÀçÀÇ ÀÔµµ¿¡ µû¸¥ SBS °³Áú ¾Æ½ºÆÈÆ® È¥ÇÕ¹°ÀÇ Á¡Åº¼º ¹°¼º ¹× ÇǷΰø¿ë Ư¼ºÀ» ¼Ò°³ÇÏ¿´´Ù. ¾Æ½ºÆÈÆ® ¹ÙÀδõ¿Í È¥ÇÕ¹°ÀÇ ¿¿ªÇÐÀû °Åµ¿ºÐ¼®À» À§ÇØ DSR ½ÃÇè°ú ÀÏÃàÀÎÀå Å©¸³½ÃÇèÀ» ½Ç½ÃÇÏ¿´´Ù. °ñÀçÀÇ ÀÔµµ¿Í SBS °³ÁúÀç°¡ ÇǷΰø¿ë¼º¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» Æò°¡Çϱâ À§ÇÏ¿© 7Á¾ÀÇ ¾Æ½ºÆÈÆ® È¥ÇÕ¹°¿¡ ´ëÇØ ÀÏÃàÀÎÀå ÇǷνÃÇèÀ» ½Ç½ÃÇÏ¿´´Ù. DSR ¹× ÀÏÃàÀÎÀå Å©¸³½ÃÇè°á°ú, °ñÀçÀÇ ÀÔµµ¿¡ °ü°è¾øÀÌ SBS °³Áú ¾Æ½ºÆÈÆ® È¥ÇÕ¹°ÀÌ ÀÏ¹Ý ¾Æ½ºÆÈÆ® È¥ÇÕ¹°¿¡ ºñÇØ °í¿Â¿¡¼ ¼Ò¼ºº¯Çü¿¡ ´ëÇÑ ÀúÇ×¼ºÀÌ Å« °ÍÀ¸·Î ³ªÅ¸³µ´Ù. Superpave ¾Æ½ºÆÈÆ® ¹ÙÀδõ ±Ô°ÝÀÇ ÇÇ·ÎÀÎÀÚ $G^*sindelta$´Â ¾Æ½ºÆÈÆ® È¥ÇÕ¹°ÀÇ ÇÇ·Î °ø¿ë¼º Æò°¡¿¡ »ç¿ëÇϱ⿡´Â ºÎÀûÀýÇÑ °ÍÀ¸·Î »ç·áµÈ´Ù. ÀÏÃàÀÎÀåÇǷνÃÇè°á°ú, °ñÀçÀÇ ÀÔµµ(¹ÐÀÔµµ, SuperpaveÀÔµµ, SMAÀÔµµ)¿¡ °ü°è¾øÀÌ SBS °³Áú ¾Æ½ºÆÈÆ® È¥ÇÕ¹°ÀÌ ÀÏ¹Ý È¥ÇÕ¹°¿¡ ºñÇØ ¾à 10¹è ÀÌ»ó ÇǷμö¸íÀÌ Å« °ÍÀ¸·Î ³ªÅ¸³µ´Ù. Àå±â³ëÈÈÄÀÇ °æ¿ì¿¡ À־µ SBS °³Áú È¥ÇÕ¹°ÀÇ ÇǷμö¸íÀÌ ÀÏ¹Ý È¥ÇÕ¹°¿¡ ºñÇØ ³ô°Ô ³ªÅ¸³µ´Ù. °ñÀçÀÇ ÀÔµµº¯È´Â SBS °³ÁúÀç¿¡ ºñÇØ ÇǷΰø¿ë¼º¿¡ ¹ÌÄ¡´Â ¿µÇâÀÌ Àû¾ú´Ù. SMA È¥ÇÕ¹°¿¡ ÷°¡ÇÑ ¼¿·ê·Î¿À½º ¼¶À¯´Â È¥ÇÕ¹°ÀÇ Á¡Åº¼º ¹°¼ºÀ̳ª ÇǷΰø¿ë¼º¿¡ ¹ÌÄ¡´Â ¿µÇâÀÌ ¹Ì¹ÌÇÏ¿´À¸³ª, DraindownÀ» ¹æÁöÇÏ´Â µ¥´Â È¿°úÀûÀ̾ú´Ù. SMA ÀÔµµ¿¡ SBS °³Áú¾Æ½ºÆÈÆ®¸¦ »ç¿ëÇÒÁö¶óµµ Draindown ¹æÁö¸¦ À§Çؼ´Â ¼¿·ê·Î¿À½º ¼¶À¯¸¦ ÷°¡ÇÒ Çʿ䰡 ÀÖÀ» °ÍÀ¸·Î »ç·áµÈ´Ù. |
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| This paper presents the characteristics of viscoelastic properties and fatigue performance of SBS modified asphalt mixtures depending on the aggregate gradation. Dynamic shear rheometer (DSR) and uniaxial tensile creep tests are performed to analyze the thermomechanical behavior of asphalt binders and mixtures, respectively. Uniaxial tensile fatigue tests for seven different asphalt mixtures are conducted to evaluate the effects of aggregate gradations and SBS modifier on the fatigue performance of the mixtures. DSR and uniaxial tensile creep tests results show that the SBS modified asphalt mixtures have better rutting resistance than the unmodified mixtures at high temperatures regardless of the aggregate gradations used. Fatigue factor $G^*sindelta$ in Superpave binder specification may not be adequate for evaluating the fatigue Performance of asphalt mixtures. It is observed from uniaxial tensile fatigue tests that SBS modified asphalt mixtures compared to unmodified mixtures have ten times longer fatigue lives regardless of the aggregate gradations(dense, SMA, and Superpave gradations) used in the mixtures. The better fatigue performance of the SBS modified mixtures is observed even after long-term aging process. The effect of aggregate gradations on the fatigue performance is not as significant as the SBS modifier. The cellulose fiber added in the SMA mixture has negligible effects on the viscoelastic Properties and fatigue performance of the mixture, but is effective in reducing draindown. Although the SBS modified asphalt binder is used, it may be necessary to add the cellulose fiber into the SMA mixture to prevent the draindown. |
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| SBS °³Áú ¾Æ½ºÆÈÆ®;°ñÀçÀÔµµ;Á¡Åº¼º ¹°¼º;ÇÇ·Î °ø¿ë¼º;SBS modified asphalt;SMA;aggregate gradation;viscoelastic property;fatigue performance; |
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Çѱ¹µµ·ÎÇÐȸ³í¹®Áý / v.2, no.3, 2000³â, pp.129-144
Çѱ¹µµ·ÎÇÐȸ
ISSN : 1738-7159
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200015637533888)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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