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Çѱ¹µµ·ÎÇÐȸ / v.7, no.2, 2005³â, pp.33-43
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¹Ý»ç±Õ¿À» ¾ïÁ¦ÇÑ ½Ã¸àÆ® ¾ÈÁ¤Ã³¸® ±âÃþ Àç·á°³¹ß
( The Development of Cement Treated Base Material with Restraint Reflection Crack ) |
| °¼ºÃ¶;À̰¿ø;Á¶À±È£; Áß¾Ó´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;Áß¾Ó´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;Áß¾Ó´ëÇб³ °ø°ú´ëÇÐ °Ç¼³È¯°æ°øÇаú;
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| ½Ã¸àÆ® ¾ÈÁ¤Ã³¸® ±âÃþÀº °¼º±âÃþÀ¸·Î ·¯ÆÃ ÀúÇ×¼ºÀÌ Å©°í »óºÎÇÏÁß ºÐ»ê, ÇǷαտÀúÇ×, ±âÃþ º¸Á¶±âÃþÀÇ ÆÄ¼Õ °¨¼ÒÀÇ È¿°ú°¡ ÀÖÀ¸¸ç °æÁ¦¼ºÀÌ ¶Ù¾î³ª´Ù´Â ÀåÁ¡ÀÌ ÀÖ´Ù. ±×·¯³ª °ÇÁ¶¼öÃà¿¡ ÀÇÇÑ ¹Ý»ç±Õ¿·Î ÀÎÇÏ¿© ±¹³»¿¡¼´Â CTB°¡ ÀüÇô Àû¿ëµÇÁö ¸øÇϰí ÀÖ´Â ½ÇÁ¤ÀÌ´Ù. µû¶ó¼ º» ¿¬±¸´Â ±¹³»¿¡ CTBÀû¿ëÀ» À§ÇÑ ±âÃÊ¿¬±¸·Î½á ¹Ý»ç ±Õ¿À» ÃÖ¼ÒÈÇϱâ À§ÇØ °ÇÁ¶¼öÃàÀ» ¾ïÁ¦ÇÒ ¼ö ÀÖ´Â Àú¼öÃà ½Ã¸àÆ® ¾ÈÁ¤Ã³¸® ±âÃþ Àç·á°³¹ßÀ» ½ÃµµÇÏ¿´´Ù. °ÇÁ¶¼öÃà ÀÌ·ÐÀ» °íÂûÇÏ¿© °ÇÁ¶¼öÃà Àú°¨¹æ¾ÈÀ» ¼ö¸³ÇÏ¿´°í °ÇÁ¶¼öÃà¿¡ ¹ÌÄ¡´Â ¿µÇâÀÎÀÚ¸¦ ¼±Á¤ÇÏ¿´À¸¸ç, °¢ È¥ÈÀçÀÇ ¸ÞÄ¿´ÏÁòÀ» ºÐ¼®ÇÑ ÈÄ ½Ç³» ½ÇÇè ¹× ÇöÀå½ÇÇèÀ» ¼öÇàÇÏ¿´´Ù. ¿¹ºñ½ÇÇèÀ» ÅëÇÏ¿© ÇöóÀÌ ¾Ö½¬ ÷°¡ºñÀ²Àº 25%·Î Á¦¾ÈÇÏ¿´°í ½Ã¸àÆ®·®Àº ¸ðµç ¹èÇÕÀÌ µµ·Î°ø»ç ¸° ±âÃþÀÇ Çã¿ë°µµ¸¦ ¸¸Á·ÇÏ´Â 7%·Î ÇÏ¿´´Ù. º» ½ÇÇè °á°ú¸¦ ¹ÙÅÁÀ¸·Î °µµ, °ÇÁ¶¼öÃàÀ², °æÁ¦¼ºÀ» °í·ÁÇÑ °á°ú, ÇöóÀÌ ¾Ö½¬ 25%, ÇöóÀÌ ¾Ö½¬ 25%¿¡ ÆØÃ¢À縦 10%¸¦ È¥ÇÕÇÑ ¹èÇÕÀ» ´ë¾ÈÀ¸·Î °áÁ¤ÇÏ¿´´Ù. ½Ç³»½ÇÇè¿¡¼ °áÁ¤µÈ ´ë¾ÈÀ» ÇöÀå ½ÇÇè¿¡ Àû¿ëÇÑ °á°ú ÇöóÀÌ ¾Ö½¬(25%)+ÆØÃ¢Àç(10%)°¡ ÃÖÀûÀÇ Àú¼öÃà ½Ã¸àÆ® ¾ÈÁ¤ ó¸® ±âÃþ ¹èÇÕÀÓÀ» Á¦½ÃÇÏ¿´´Ù. |
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| This paper describes a new approach to minimize the amount of shrinkage cracking in cement treated base(CTB). CTB is a stiffness base having lots of merits such as higher rutting resistance, minimizing fatigue cracking, and the ability to distribute upper loads. However, It is not applied to asphalt pavement system in Korea because of possible cracks caused by dry shrinkage. The goal of this study is the development of cement treated base with lower shrinkage for preventing reflection cracks and rutting. After identifying factors affecting dry shrinkage and analyzing mechanism of each admixture, the laboratory and field tests were designed and performed. Through the preliminary tests, the mix design containing 25 percent o( fly ash and 7 percent of cement was suggested. This mix design was satisfied with strength for Korea specification standard. According to the results considering strength, shrinkage, and economical efficiency, two mix designs were selected; 1) containing 25 percent of fly ash and 2) containing 25 percent of fly ash with 10 percent of expensive additive. For field test based on the result of laboratory test, the optimized alternative in cement treated base with lower shrinkage was the mix design containing 25 percent of fly ash with 10 percent of expansive additive. |
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| ½Ã¸àÆ® ¾ÈÁ¤Ã³¸® ±âÃþ;ÇöóÀÌ ¾Ö½¬;È¥ÈÀç;°ÇÁ¶¼öÃà;cement treated base;fly-ash;admixture;dry-shrinkage; |
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Çѱ¹µµ·ÎÇÐȸ³í¹®Áý / v.7, no.2, 2005³â, pp.33-43
Çѱ¹µµ·ÎÇÐȸ
ISSN : 1738-7159
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200515637507089)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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