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Çѱ¹Áö¹Ý°øÇÐȸ / v.20, no.3, 2004³â, pp.75-83
¼®È¸³ëºÐ°ú ¼®È¸·Î ó¸®µÈ ¼¼¸³ÅäÀÇ ´Ü±âÀû ¿ªÇÐÆ¯¼º ºñ±³
( Comparison of Short-term Mechanical Characteristics of Fine-grained Soils Treated with Lime Kiln Dust and Lime )
±è´ëÇö;»ç°ø¸í;ÀÌ¿ëÈñ; ¹Ì±¹ ÀÎµð¾Æ³ªÁÖ µµ·Î±¹ ¿¬±¸¼Ò Áö¹Ý°øÇÐ;Çѱ¹Ã¶µµ±â¼ú¿¬±¸;Çѱ¹µµ·Î°ø»ç Áö¹Ý°øÇÐ;
 
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ÀÎµð¾Æ³ªÁÖ µµ·Î±¹ (INDOT, Indiana Department of Transportation)¿¡¼­´Â ºÎºÐÀûÀ¸·Î 1990³â´ë ÃʹݺÎÅÍ Åä»ç°³·®(Áö¹Ý ¾ÈÁ¤È­´Â ¾Æ´Ô)¿¡ ´ëÇÑ Àúºñ¿ëÀÇ °Ç¼³Àç·á·Î¼­ ¼®È¸³ëºÐÀ» »ç¿ëÇØ¿Ô´Ù. ±×·¯³ª ¼®È¸³ëºÐÀ» Æ÷ÇÔÇÑ ÈëÀÇ °­µµÇâ»óÀº ¼³°è°úÁ¤¿¡¼­ ³ë»óÀÇ ¾ÈÁ¤È­°è»ê¿¡ ¹Ý¿µµÇÁö ¾Ê¾Ò´Ù. µû¶ó¼­ º» ¿¬±¸´Â ¼®È¸³ëºÐÀÌ ¼öÈ­µÈ ¼®È¸¿Í À¯»çÇÑ °øÇÐÀû ¼ºÁúÀ» Áö´Ñ Àç·áÀÎÁö¸¦ Æò°¡Çϱâ À§ÇÏ¿© ¼öÇàµÇ¾úÀ¸¸ç, ÀÎµð¾Æ³ªÁÖ¿¡¼­ ÈçÈ÷ Á¢ÇÒ¼ö ÀÖ´Â A-4, A-6, A-7-6¿Í °°ÀÌ ¼¼¸³ºÐÀÌ ¿ì¼¼ÇÑ ´Ù¾çÇÑ Èë°ú Á¶ÇÕÇÏ¿© ¼®È¸³ëºÐÀÇ ¿ªÇÐÀû ÀåÁ¡µéÀ» Æò°¡Çϱâ À§ÇØ ÀÏ·ÃÀÇ ½Ç³»½ÇÇèµéÀ» ¼öÇàÇÏ¿´´Ù. º» ¿¬±¸¿¡¼­´Â ¾ÆÅ͹ö±×ÇѰè, Ç¥ÁØ´ÙÁü, ÀÏÃà¾ÐÃà, CBR, üÀû ¾ÈÁ¤¼º°ú ȸº¹Åº¼º°è¼öµîÀÇ ½ÇÇèµéÀ» ¼öÇàÇÏ¿´À¸¸ç ±× °á°ú ºñó¸®Åä¿¡ ºñÇØ ó¸®ÅäÀÇ °æ¿ì 60-400% Á¤µµÀÇ ¹üÀ§·Î ÀÏÃà¾ÐÃà°­µµ°¡ Áõ°¡ÇÏ¿´´Ù. ºñÈ¥ÇÕÅä¿¡ ´ëÇÑ CBR °ªÀÇ ¹üÀ§°¡ 3-18ÀÎ °Í¿¡ ¹ÝÇÏ¿©, È¥ÇÕÅä¿¡ ´ëÇÑ CBR °ªµéÀº25-70ÀÇ ¹üÀ§³»¿¡ ÀÖ´Ù. ¶ÇÇÑ, ÀϹÝÀûÀ¸·Î È¥ÇÕÅäÀÇ È¸º¹Åº¼º°è¼öµµ »ó´çÈ÷ Áõ°¡ÇÏ´Â °ÍÀ¸·Î °üÂûµÇ¾ú´Ù. ÀÌ»óÀÇ °á°ú´Â ¼®È¸³ëºÐÀº ¼öÈ­µÈ ¼®È¸¿¡ ´ëÇÑ ´ë¾ÈÀ¸·Î¼­ ½Ç¿ëÀûÀÌ°í °æÁ¦ÀûÀÎ Àç·áÀÌ¸ç ¼¼¸³ÅäÀÇ °­µµ¸¦ Çâ»ó½Ã۸ç ÀÛ¾÷¼ºÀ» Çâ»ó½Ãų ¼ö ÀÖÀ½À» ¾Ï½ÃÇÑ´Ù.
The Indiana Department of Transportation (INDOT) has permitted the use of Lime Kiln Dust (LKD) as a low-cost construction material in creating a workable platform for soil modification (not for soil stabilization) since the early 1990s on selected projects. However, the enhanced strength of soils with LKD has not been accounted for in the subgrade stability calculations in the design process. This study was initiated to evaluate how the lime kiln dust is a comparable material to hydrated lime. A series of laboratory tests were performed to assess the mechanical benefits of lime kiln dust in combination with various predominant fine grained soils encountered in the State of Indiana, such as A-4, A-6 and A-7-6. In the course of this study, several tests such as the Atterberg limits, standard Proctor, unconfined compression, CBR, volume stability, and resilient modulus were performed. As a result, mixtures of fine grained soils with 5% lime or 5% LKD substantially improve unconfined compressive strength up to 60% - 400%. CBR values for treated soils are in the range of 25 to 70 while those for untreated soils range from 3 to 18. In general, significant increase in resilient moduli of the soils treated with lime and LKD was observed. This indicates that lime kiln dust may be a viable, cost effective alternative to hydrated lime in enhancing the strength of fine grained soils.
 
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Fine grained soils;Lime;Lime kiln dust;Resilience modulus;Stability;Subgrade;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.20, no.3, 2004³â, pp.75-83
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200411922341587)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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