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Çѱ¹µµ·ÎÇÐȸ / v.9, no.1, 2007³â, pp.57-67
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¾Æ½ºÆÈƮȥÇÕ¹°À» Æò°¡Çϱâ À§ÇÑ À¯È¿¾Æ½ºÆÈÆ® ÇÔ·®ÀÇ »õ·Î¿î °è»ê ¸ðµ¨
( The New Calculation Model of Film Thickness to Evaluat Asphalt Mixtures ) |
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| ÃÖ±Ù ¾Æ½ºÆÈÆ® È¥ÇÕ¹°ÀÇ VMA ȤÀº ±× ¿Ü ´Ù¸¥ üÀû¿ä¼ÒÀÇ ±âÁذªÀ» ´ëüÇϱâ À§ÇØ À¯È¿¾Æ½ºÆÈÆ® ÇÔ·®(film thickness)¿¡ ´ëÇØ ³íÀÇµÇ¾î ¿Ô´Ù. À̵é Áß ÀϺδ À¯È¿ ¾Æ½ºÆÈÆ® ÇÔ·®ÀÇ ±âÁذªÀ» Á¦¾ÈÇÏ¿´À¸¸ç, ÀϺδ »õ·Î¿î °³³ä ¶Ç´Â °è»ê ¹æ¹ýÀ» Æ÷ÇÔÇÏ´Â »õ·Î¿î ¸ðµ¨À» Áï, À妽º ¸ðµ¨(index model) ¶Ç´Â °¡»ó ¸ðµ¨(virtual model)À» ¼Ò°³ÇÏ¿´´Ù. °¢°¢ÀÇ ¸ðµ¨Àº ¾Æ½ºÆÈƮȥÇÕ¹°ÀÇ Ã¼ÀûƯ¼ºÀ» ¼³¸íÇϴµ¥ ÀÖ¾î¼ Çü»ó, Å©±â µî °ñÀçÀÇ Ã¼ÀûƯ¼ºÀ» Á¤·®ÈÇÏ´Â ¹æ¹ýÀ» ÀÌ¿ëÇÑ´Ù. º» ¿¬±¸¿¡¼´Â À妽º ¸ðµ¨°ú °¡»ó ¸ðµ¨ÀÇ ÀåÁ¡À» °áÇÕÇÑ °³¼±µÈ °¡»ó ¸ðµ¨ (modified virtual model)À» Á¦¾ÈÇÏ¿´´Ù. °³¼±µÈ °¡»ó ¸ðµ¨À» ±âÁ¸ÀÇ µÎ °¡Áö ¸ðµ¨°ú ºñ±³Æò°¡Çϱâ À§ÇÏ¿© DASR °³³ä¿¡ ±Ù°ÅÇÏ¿© Á¦ÀÛµÈ ÃÑ 8°³ÀÇ È¥ÇÕ¹°À» ´ë»óÀ¸·Î IDT ½ÃÇè°ú APA ½ÃÇèÀ» ¼öÇàÇÏ¿´´Ù. ½ÃÇè °á°ú, ¾Æ½ºÆÈÆ® È¥ÇÕ¹°ÀÇ °ø¿ë¼º°ú À¯È¿ ¾Æ½ºÆÈÆ® ÇÔ·®ÀÇ °ü°è¸¦ °è»êÇÔ¿¡ ÀÖ¾î¼ º» ¿¬±¸¿¡¼ Á¦¾ÈµÈ °¡»ó ¸ðµ¨Àº ±âÁ¸ÀÇ ¸ðµ¨µé¿¡ ºñÇØ ´õ ÀûÀýÇÔÀ» ¾Ë ¼ö ÀÖ¾ú´Ù. |
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| Many researches have recently discussed about the film thickness as a good substitute or supplement for VMA or other volumetric criteria in the design procedure. Some researchers have not only proposed the specific number for the recommended film thickness, but also introduced the new calculation procedures or concepts. Each model (index model and the virtual model) has its own advantages and disadvantages in terms of the ability to account for the volumetric properties of the mixture. In this paper, the modified virtual model was proposed to combine advantages from both models. However, it cannot be disregarded the way to determine the appropriate particle shape factors for different sources and sizes of aggregates. In order to evaluate the different calculation methods, mixtures with two aggregate sources and eight gradations were designed based on the dominant aggregate size range (DASR) porosity concept. Superpave indirect tensile test (IDT) and asphalt pavement analyzer (AEA) test were used to describe the performance of mixtures. Test results indicated that the virtual model, which is the same to the modified virtual model for sphere 1:1 case, is better than the conventional standard model to define the range of the film thickness to have better performance of asphalt mixtures. |
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Çѱ¹µµ·ÎÇÐȸ³í¹®Áý / v.9, no.1, 2007³â, pp.57-67
Çѱ¹µµ·ÎÇÐȸ
ISSN : 1738-7159
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200712242667486)
¾ð¾î : ¿µ¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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