|
|
|
Çѱ¹Áö¹Ý°øÇÐȸ / v.23, no.8, 2007³â, pp.159-169
|
¼¶À¯ÀÇ º¸° ÇüÅ¿¡ µû¸¥ ¼¶À¯-½Ã¸àÆ® È¥ÇÕÅäÀÇ ÀÏÃà¾ÐÃà°µµÆ¯¼º
( Unconfined Compressive Strength of Fiber-reinforced Cemented Sands by Fiber Reinforcement Form ) |
| ¹Ú¼º½Ä;±è¿µ¼ö;ÀÌÁ¾Ãµ; ¿ø±¤´ëÇб³ °ø°ú´ëÇÐ Åä¸ñȯ°æµµ½Ã°øÇкÎ;°æºÏ´ëÇб³ °ø°ú´ëÇÐ °Ç¼³°øÇкΠÅä¸ñ°øÇаú;¿ø±¤´ëÇб³ °ø°ú´ëÇÐ Åä¸ñȯ°æµµ½Ã°øÇкÎ;
|
|
|
 |
|
| |
| ÃÊ ·Ï |
| Ã뼺ÀûÀÎ ÆÄ±«¸¦ º¸ÀÌ´Â ½Ã¸àÆ® È¥ÇÕÅäÀÇ ¿ªÇÐÀû Ư¼ºÀ» °³¼±Çϱâ À§ÇÏ¿© ´Ü¼¶À¯¸¦ »ç¿ëÇÑ ¼¶À¯½Ã¸àÆ® È¥ÇÕÅä¿¡ °üÇÑ ¿¬±¸¸¦ ¼öÇàÇÏ¿´´Ù. ³«µ¿° À¯¿ª¿¡¼ äÃëÇÑ ¸ð·¡, º¸ÅëÆ÷Ʋ·£µå½Ã¸àÆ® ±×¸®°í ÃÖ±Ù ÄÜÅ©¸®Æ®¿Í ½Ã¸àÆ® º¸°Àç·Î ¸¹ÀÌ »ç¿ëµÇ°í ÀÖ´Â Æú¸®ºñ´Ò¾ËÄÚ¿Ã(PVA) ¼¶À¯¸¦ »ç¿ëÇÏ¿´´Ù. PVA ¼¶À¯´Â ½Ã¸àÆ®¿Í Á¢Âø¼ºÀÌ ¸Å¿ì ¿ì¼öÇÏ¸ç ºñÁßÀÌ 1.3À¸·Î ¹°º¸´Ù ¾à°£ Å« °ÍÀÌ Æ¯Â¡ÀÌ¸ç ½Ã¸àÆ® º¸°Àç·Î »ç¿ëµÇ°í ÀÖ´Â ÀÏ¹Ý PVA ¼¶À¯º¸´Ù´Â ´Ù¼Ò Á÷°æÀÌ Å« 0.1mmÀÇ PVA ¼¶À¯¸¦ »ç¿ëÇÏ¿´´Ù. ±ú²ýÇÑ ³«µ¿° ¸ð·¡¿¡ ½Ã¸àÆ®¿Í ¼¶À¯¸¦ ÃÖÀûÇÔ¼öºñ·Î Àß ¼¯Àº ÈÄ 5ÃþÀ¸·Î ³ª´©¾î Ãþ´ç 55ȸ ´ÙÁüÇÏ¿© °ø½Ãü¸¦ ¸¸µç ÈÄ 7Àϰ£ ¾ç»ý½ÃÄ×´Ù. ¸ðµç °ø½ÃüÀÇ ½Ã¸àÆ® È¥ÇÕÀ²Àº 4%·Î µ¿ÀÏÇÏÁö¸¸ ¼¶À¯ÀÇ È¥ÇÕÀ§Ä¡¸¦ ´Ù¸£°Ô ½Ã·á¸¦ Á¦ÀÛÇÏ¿© ÀÏÃà¾ÐÃà½ÃÇèÀ» ½Ç½ÃÇÏ¿´´Ù. °µµ½ÃÇè¿¡¼ ¼¶À¯ÀÇ º¸° ÇüÅÂ¿Í À§Ä¡¿¡ µû¸¥ ÀÏÃà¾ÐÃà°µµÀÇ Æ¯¼ºÀ» ºñ±³ÇÏ¿´À¸¸ç, µ¿ÀÏÇÑ ¾çÀÇ ¼¶À¯°¡ ±ÕÀÏÇÏ°Ô º¸°µÈ °æ¿ìÀÇ ÀÏÃà¾ÐÃà°µµ°¡ ±×·¸Áö ¾ÊÀº °æ¿ìº¸´Ù ¾à 2¹è Áõ°¡ÇÏ¿´´Ù. Ãþ´ç ¼¶À¯ È¥ÇÕÀ²ÀÌ µ¿ÀÏÇÒ °æ¿ì ¼¶À¯ º¸°À²ÀÌ Áõ°¡ÇÔ¿¡ µû¶ó ÀÏÃà¾ÐÃà°µµµµ Áõ°¡ÇÏ¿´À¸¸ç, ÀüÃþÀÌ º¸°µÇ¾úÀ» ¶§ÀÇ ÀÏÃà¾ÐÃà°µµ´Â Áß°£Ãþ¸¸ º¸°µÈ °æ¿ìº¸´Ù 1.5¹è ÀÌ»ó °µµ°¡ Áõ°¡ÇÏ¿´´Ù. ¼¶À¯-½Ã¸àÆ® È¥ÇÕÅä °Åµ¿¿¡¼ ¼¶À¯ÀÇ È¥ÇÕÀ²°ú ¼¶À¯°¡ °ñ°í·ç Àß ºÐ»êµÇµµ·Ï ÇÏ´Â ¹æ¹ý ¶Ç´Â ºÐ»êÀÌ ¿ëÀÌÇÑ ¼¶À¯¸¦ ¼±ÅÃÇÏ´Â °ÍÀÌ Áß¿äÇÏ¿´´Ù. |
|
| The behavior of fiber-reinforced cemented sands (FRCS) was studied to improve a brittle failure mode observed in cemented sands. Nak-dong River sand was mixed with ordinary Portland cement and a Polyvinyl alcohol (PVA) fiber. A PVA fiber is widely used in concrete and cement reinforcement. It has a good adhesive property to cement and a specific gravity of 1.3. A PVA fiber has a diameter of 0.1 mm that is thicker than general PVA fiber for reinforced cement. Clean Nak-dong River sand, cement and fiber at optimum water content were compacted in 5 layers giving 55 blows per layer. They were cured for 7 days. Cemented sands with a cement/sand ratio of 4% were fiber-reinforced at different locations and tested for unconfined compression tests. The effect of fiber reinforcement form and distribution on strength was investigated. A specimen with evenly distributed fiber showed two times more strength than not-evenly reinforced specimen. The strength of fiber-reinforced cemented sands increases as fiber reinforcement ratio increases. A fully reinforced specimen was 1.5 times stronger than a specimen reinforced at only middle part. FRCS behavior was controlled not only by a dosage of fiber but also by fiber distribution methods or fiber types. |
| |
| Ű¿öµå |
| Cemented sand;Distribution;Fiber-reinforced;Unconfined compression test; |
| |
|
|
 |
|
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.23, no.8, 2007³â, pp.159-169
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200734516349018)
¾ð¾î : Çѱ¹¾î |
|
| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
|
|
|
|
|
|