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Çѱ¹µµ·ÎÇÐȸ / v.8, no.4, 2006³â, pp.125-133
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Åë°èÀû ºÐ¼®À» ÅëÇÑ KS ¾Æ½ºÆÈÆ® ħÀÔµµ ±Ô°ÝÀÇ ¹®Á¦Á¡ °íÂû
( Statistical Evaluation of Validity of KS Asphalt Penetration Grade System ) |
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| º» ³í¹®Àº KSÀÇ Ä§ÀÔµµ µî±Þ ü°è¿¡ ´ëÇÑ Åë°èÀû Ÿ´ç¼ºÀ» °ËÅäÇÏ¿´´Ù. °¢ µî±ÞÀÇ ¹üÀ§´Â ½Å·Ú±¸°£¿¡ ±Ù°ÅÇÏ¿© ¼³Á¤µÇ¾î¾ß Çϸç, ÃÖ´ëÇÑ ÀÎÁ¢ µî±Þ°úÀÇ Áߺ¹À» ÇÇÇϵµ·Ï ÇØ¾ß ÇÑ´Ù. ±×·¯³ª Åë°èÀû À̷п¡ ±Ù°ÅÇØ °ËÅäÇÑ °á°ú KS ħÀÔµµ µî±Þ ü°è¿¡´Â °¢ µî±Þ »çÀÌ¿¡ °£°Ý(Gap)ÀÌ ¾ø¾î¼ ¹üÀ§¸¦ ¹þ¾î³ª´Â °ÍÀº ¹Ù·Î ´Ù¸¥ ¹ÙÀδõÀÇ µî±ÞÀ» ħ¹üÇÑ´Ù´Â Á¡À» ¾Ë ¼ö ÀÖ¾ú´Ù. µû¶ó¼ ¸¹Àº ¹ÙÀδõ Á¦Ç°µéÀÇ Ä§ÀÔµµ Æò±Õ°ªÀÌ ±ÔÁ¤ÇÑ°è ³»¿¡ ÀÖÀ»Áö¶óµµ ÀÎÁ¢ÇÑ µî±Þ°ú À¯»çÇÑ Æ¯¼ºÀ» °¡Áú ¼ö ÀÖ´Ù. ¶ÇÇÑ Ä§ÀÔµµ 40-60, 60-80, 80-100°ú °°ÀÌ µî±ÞÀÇ ¹üÀ§¸¦ ¸ðµÎ 20À¸·Î ±ÔÁ¤ÇÑ °ÍÀº Åë°èÀû Ÿ´ç¼ºÀÌ ¾ø´Ù. KS ħÀÔµµ µî±ÞÀº °¢ µî±Þ °£¿¡ °£°ÝÀÌ ¾ø±â ¶§¹®¿¡ »ý»êÀÚ´Â Á¦Ç°ÀÇ Ç°Áú°ü¸® ±ÔÁ¤À» ¸¸Á·Çϱâ À§ÇÏ¿© ASTM ü°èÀÇ Á¦Ç°º¸´Ù º¯µ¿°è¼ö¸¦ ´õ ³·°Ô À¯ÁöÇØ¾ß ÇÑ´Ù. °Ô´Ù°¡ ħÀÔµµÆò±ÕÀÌ »ó ÇÏÇѼ± ÂÊÀ¸·Î Ä¡¿ìÄ£´Ù¸é Àç·áÀÇ Ç°Áú ºÒÈ®½Ç¼º ¶§¹®¿¡ ¹ÙÀδõÀÇ 1/2 ¶Ç´Â ±× ÀÌ»óÀÌ ÀÎÁ¢ ¹ÙÀδõ¿Í Áߺ¹µÈ °ÍÀÌ´Ù. ±×·¯¹Ç·Î KSħÀÔµµ µî±ÞÀº Åë°èÀûÀ¸·Î Ÿ´çÅä·Ï ¹Ù·Î ¼öÁ¤µÇ¾î¾ß ÇÑ´Ù. |
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| In this study, the Korean Industrial Standard(KS) penetration grade system was examined to evaluate its statistical validity. It was found from this limited study that the system has no gap between each grade, the binder falling out of limit trespasses into other binder grade. Therefore, many products can have similar property level with an adjacent grade even though the mean value is within the specification limit. It was also found out that the equal range setup of each grade, such as 20 for 40-60, 60-80, 80-100, has no statistical foundation. Since KS penetration grade is defined without gap between each grade, the producer must maintain the coefficient of variation below the level by the ASTM system to satisfy the normal quality control limit of products. Due to its lack of a gap between grades, higher percentage of products will be duplicated even if the mean is at the median of the specification limits due to material's quality uncertainty. Especially if the mean moves toward the upper limit, a half or more of the binder grade will be overlapped with the upper binder grade. Therefore, KS penetration specification should be immediately modified by statistically valid methodologies. |
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| ħÀÔµµ;Æò±Õ;Ç¥ÁØÆíÂ÷;Ç¥ÁØ¿ÀÂ÷;½Å·Ú±¸°£;°Ë»çƯ¼º°î¼±;penetration;mean;standard deviation;standard error of mean;POL;PTL;confidence interval operation characteristics curve; |
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Çѱ¹µµ·ÎÇÐȸ³í¹®Áý / v.8, no.4, 2006³â, pp.125-133
Çѱ¹µµ·ÎÇÐȸ
ISSN : 1738-7159
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200606140741285)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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