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Çѱ¹µµ·ÎÇÐȸ / v.10, no.4, 2008³â, pp.189-198
¼ö»êÈ­Ä®½·À» ÷°¡ÇÑ UFFA ÃʼӰæ ÄÜÅ©¸®Æ®ÀÇ ¹°¼ºÆ¯¼º Æò°¡
( Material Property Evaluation for UFFA Rapid Setting Concrete including Calcium Hydroxide )
Àü¼ºÀÏ;³²Á¤Èñ;¾ÈÁöȯ;±Ç¼ö¾È; Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø µµ·Î½Ã¼³¿¬±¸½Ç;Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø µµ·Î½Ã¼³¿¬±¸½Ç;Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø µµ·Î½Ã¼³¿¬±¸½Ç;Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø µµ·Î½Ã¼³¿¬±¸½Ç;
 
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ÀϹÝÀûÀ¸·Î UFFA(Ultra Fine Fly Ash)´Â ÀÏ¹Ý ÇöóÀÌ ¾Ö½Ãº¸´Ù ¿öÄ¿ºô¸®Æ¼¸¦ ´õ ÁÁ°Ô ÇÏ°í Æ÷Á¹¶õ ¹ÝÀÀÀ» ´õ Å©°Ô Ȱ¼ºÈ­½ÃŰ´Â Ư¼ºÀ» °¡Áö°í ÀÖÀ¸¸ç, ÀÌ¿Í °°Àº Ư¼ºÀÌ ÄÜÅ©¸®Æ®ÀÇ ³»±¸¼ºÀ» ´õ¿í Çâ»ó½ÃŰ´Â °ÍÀ¸·Î º¸°íµÇ°í ÀÖ´Ù. º» ¿¬±¸¿¡¼­´Â ÀÌ·¯ÇÑ UFFAÀÇ Æ¯¼ºÀ» Ȱ¿ëÇÏ¿© ÃʼӰæ½Ã¸àÆ®¿¡ UFFA¸¦ ÷°¡ÇÑ ÄÜÅ©¸®Æ® È¥ÇÕ¹°ÀÌ Á¶±â±³Åë°³¹æ¿ë ÄÜÅ©¸®Æ®Æ÷Àå º¸¼öÀç·á·Î¼­ Ȱ¿ëÀÌ °¡´ÉÇÑÁö ¿©ºÎ¸¦ ÆÇ´ÜÇϰíÀÚ ÇÏ¿´´Ù. ±â ¿¬±¸¿¡¼­´Â ÃʼӰæ½Ã¸àÆ®¿¡ UFFA¸¸À» ÷°¡ÇÒ °æ¿ì, Æ÷Á¹¶õ ¹ÝÀÀÀÌ Å©°Ô Ȱ¼ºÈ­µÇÁö ¸øÇÏ¿© ³»±¸¼º ÁõÁø¿¡ Å« È¿°ú°¡ ³ªÅ¸³ªÁö ¾Ê¾Ò´Ù. ÀÌ¿¡ º» ¿¬±¸¿¡¼­´Â ÃʼӰæ½Ã¸àÆ®¿Í UFFA¿¡ ¼ö»êÈ­Ä®½·À» Ãß°¡·Î ÷°¡ÇÏ¿© Á¦Á¶µÈ ÄÜÅ©¸®Æ® È¥ÇÕ¹°ÀÇ Æ÷Á¹¶õ ¹ÝÀÀ ¹ß»ý¿©ºÎ¸¦ ÆÇ´ÜÇϰí, À̰ÍÀÌ ÄÜÅ©¸®Æ® ¹°¼º¿¡ ¾î¶°ÇÑ ¿µÇâÀ» ¹ÌÄ¡´ÂÁö¸¦ ºÐ¼®ÇÏ¿´´Ù. º» ¿¬±¸°á°ú, ÃʼӰæ½Ã¸àÆ®¿¡ UFFA¸¦ ÷°¡ÇÒ °æ¿ì W/Cºñ¸¦ Å©°Ô ³·Ãâ ¼ö ÀÖ¾î ÄÜÅ©¸®Æ®ÀÇ Á¶±â°­µµ Àú°¨ºÎºÐÀ» ÃæºÐÈ÷ »ó¼â½Ãų ¼ö ÀÖ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ¶ÇÇÑ X-¼±È¸ÀýºÐ¼®°ú ¿°¼ÒÀÌ¿ÂħÅõÀúÇ×¼º ½ÇÇè°á°ú¸¦ º¼ ¶§ ¼ö»êÈ­Ä®½· ÷°¡¿¡ µû¸¥ UFFAÃʼӰæ ÄÜÅ©¸®Æ®ÀÇ Æ÷Á¹¶õ¹ÝÀÀÀÌ Ã·°¡ÇÏÁö ¾ÊÀº °Í¿¡ ºñÇÏ¿© ´õ Å©°Ô Ȱ¼ºÈ­µÇ´Â °ÍÀ¸·Î ³ªÅ¸³µÀ¸¸ç, ƯÈ÷ ¼ö»êÈ­Ä®½· ÷°¡·®ÀÌ Áõ°¡ÇÔ¿¡ µû¶ó UFFA ÃʼӰæ ÄÜÅ©¸®Æ®ÀÇ Åõ¼öÀúÇ×¼ºÀÌ Àü¹ÝÀûÀ¸·Î ÁõÁøµÊÀ» ¾Ë ¼ö ÀÖ¾ú´Ù.
Generally, UFF A(Ultra Fine Fly Ash) has merit that advances a greater concrete workability and activates a greater pozzolanic reaction than common fly ash due to its ultra fine particle size. These properties enhance concrete durability by reducing permeability and increasing resistance of alkali silica reaction(ASR) and sulfate attack, etc. Due to these reasons, UFFA can be used in a rapid setting concrete. The purpose of this study is to develop and evaluate the rapid setting concrete with UFF A as a repair material for early-opening-to-traffic. In previous studies, if only UFFA is added to the rapid setting concrete mixture, pozzolanic reaction doesn't happen actively. Therefore, in this study, the chemical and physical tests were performed for rapid setting concrete with UFFA including calcium hydroxide and the activity of pozzolanic reaction was evaluated. Finally, the effectiveness of this mixture on enhancing concrete durability was investigated. As results, adding UFF A decreased the water/cement ratio of concrete, and compensated the reduced portion of the early strength of concrete. Also, rapid setting concrete with UFFA including calcium hydroxide activated a greater pozzolanic reaction than normal-UFF A concrete. As calcium hydroxide increases, electrical indication of concrete's ability to resist chloride ion penetration is promoted significantly.
 
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¿ïÆ®¶ó ÆÄÀÎ ÇöóÀֽ̾Ã;¼ö»êÈ­Ä®½·;ÃʼӰæ ÄÜÅ©¸®Æ®;Æ÷Á¹¶õ ¹ÝÀÀ;ultra fine fly ash;calcium hydroxide;rapid setting concrete;pozzolanic reaction;
 
Çѱ¹µµ·ÎÇÐȸ³í¹®Áý / v.10, no.4, 2008³â, pp.189-198
Çѱ¹µµ·ÎÇÐȸ
ISSN : 1738-7159
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200806135607956)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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