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Çѱ¹µµ·ÎÇÐȸ / v.6, no.2, 2004³â, pp.15-24
HP-GPC¸¦ ÀÌ¿ëÇÑ Æú¸®¸Ó°³Áú ¾Æ½ºÆÈÆ®ÀÇ ³ëȭƯ¼º ºÐ¼®
( Evaluation of Aging Characteristics of Selected PMA using HP-GPC )
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»êÈ­´Â ¾Æ½ºÆÈÆ®¿¡¼­ ´ëÇüºÐÀÚ(LMS : Large Molecular Size) ¾çÀÇ Áõ°¡¸¦ ¾ß±âÇÏ°í ¹ÙÀδõÀÇ °æÈ­¿¡ ÁÖ¿ä ¿øÀÎÀÌ µÇ¹Ç·Î ¹ÙÀδõ »êÈ­¸¦ Àú°¨½ÃŰ¸é µµ·Î ¹× °øÇ× Æ÷ÀåÀÇ °ø¿ë¼ö¸í ¿¬ÀåÀ» ±â´ëÇÒ ¼ö ÀÖ´Ù. ¹ÙÀδõ »êÈ­´Â È¥ÇÕ¹°À» µµ·Î¿¡ ±ò±â Àü¿¡ °¡¿­µÈ °ñÀç¿Í È¥ÇÕÇÏ´Â µ¿¾È°ú ¾Æ½ºÆÈÆ® Æ÷ÀåÀÌ ½Ã°øµÈ ÈÄ °ø¿ë±â°£ µ¿¾È¿¡ ÀϾ´Ù. º» ¿¬±¸¿¡¼­´Â ¹ÙÀδõ¸¦ ´Ü±â ¹× Àå±â³ëÈ­ ó¸® ÈÄ LMSÀÇ ¾çÀû Áõ°¡¸¦ HP-GPC (High-Pressure Gel-Permeation Chromatography)ÀÇ ÀÚ·á¿¡ ±Ù°ÅÇÏ¿© ÇØ¼®ÇÏ¿´´Ù °³Áú ¾Æ½ºÆÈÆ®´Â LMSÀÇ Áõ°¡À²ÀÌ ¾Æ½ºÆÈÆ®ÀÇ Á¾·ù¿¡ µû¶ó ´Ù¸¦ Áö¶óµµ ´Ü±â³ëÈ­ ÈÄ LMSÀÇ 20-30%Áõ°¡. Àå±â³ëÈ­ ÈÄ 2¹è ÀÌ»óÀÇ Áõ°¡¸¦ ³ªÅ¸³Â´Ù. º» ¿¬±¸¿¡¼­ °³Áú ¾Æ½ºÆÈÆ®ÀÇ ³ëȭƯ¼ºÀ» °üÂûÇϱâ À§ÇÏ¿© »ç¿ëµÈ °³ÁúÁ¦´Â ¼±Çà ¿¬±¸¿¡¼­ Å« ¿ªÇÐÀû Ư¼º Çâ»óÀ» º¸ÀÎ LDPE(Low-Density Polyethylene)¿Í SBS(Styrene-Butadiene-Styrene block copolymers) ¸¦ »ç¿ëÇÏ¿´´Ù. LDPE·Î °³ÁúÇÑ ¹ÙÀδõ´Â ´Ü Àå±â³ëÈ­ ÈÄ LMSÀÇ Áõ°¡ ºñÀ²ÀÌ »ó´çÈ÷ ³·¾Ò´Ù. ÀÌ¿Í °°ÀÌ ³·Àº LMSÀÇ Áõ°¡´Â LDPE °³Áú ¾Æ½ºÆÈÆ®°¡ ³ëÈ­ 󸮵Ǵ µ¿¾È¿¡ ÀÏ¹Ý ¾Æ½ºÆÈÆ®º¸´Ù ´ú ³ëÈ­°¡ ÁøÇàµÈ´Ù´Â °ÍÀ» ÀǹÌÇÑ´Ù ÀÌ´Â ¾Æ½ºÆÈÆ® ½Ã¸àÆ® ³»¿¡ ºÐ»êµÈ LDPE ÀÔÀÚ°¡ »êÈ­ ³ëÈ­ÀÛ¿ëÀ» ¹æÇØÇϱ⠶§¹®ÀÎ °ÍÀ¸·Î º¸ÀδÙ.
Oxidation causes increment of the quantity of large molecular size or LMS in asphalt and is a major reason for hardening of asphalt binder. An extended service life of pavement on a road is expected by reducing oxidation of binder. Oxidation of binder occurs during hot mixing with aggregates before placement on road and then during in-service after the asphalt pavement is constructed. Quantitative increase of LMS as result of aging after RTFO and PAV was analyzed based on the data from high-pressure gel-permeation chromatography (HP-GPC). Polymer modified asphalt (PMA) after RTFO procedure showed 20-30% increment in LMS and then after PAV procedure more than twice, although the percentage of increment was different according to asphalt brand and grade. The PMAs containing LDPE or SBS, which showed a great mechanical property improvement in previous studies, were selected for characterizing PMA aging In this study. Considerably reduced increment of LMS was observed from the PMA containing LDPE after RTFO and PAV procedures. The GPC result showing the binder with less LMS increment means that the asphalt while being mixed with LDPE was aged less during the aging treatment. The dispersed particle of LDPE in asphalt cement seems to disturb oxidative aging reaction and evaporation.
 
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Çѱ¹µµ·ÎÇÐȸ³í¹®Áý / v.6, no.2, 2004³â, pp.15-24
Çѱ¹µµ·ÎÇÐȸ
ISSN : 1738-7159
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200415637508259)
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