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³í¹®¸í ·¹¿Ã·ÎÁö Á¤¼ö¸¦ ÀÌ¿ëÇÏ¿© 21, 24MPa±Þ ÀϹݰ­µµ ÄÜÅ©¸®Æ®ÀÇ Àç·áºÐ¸® °æ°è¸¦ ÆÇ´ÜÇϱâ À§ÇÑ ±âÃÊ¿¬±¸ / A Fundamental Research on Determining Segregation Boundary using Rheological Parameters for 21 and 24MPa grade of Normal Strength Concrete
ÀúÀÚ¸í ÀÌÀ¯Á¤(Lee, You-Jung)½Äº°ÀúÀÚ ; ÀÌ¿µÁØ(Lee, Young-Jun)½Äº°ÀúÀÚ ; Çѵ¿¿±(Han, Dongyeop)
¹ßÇà»ç Çѱ¹°ÇÃà½Ã°øÇÐȸ
¼ö·Ï»çÇ× Çѱ¹°ÇÃà½Ã°øÇÐȸ ³í¹®Áý, Vol.20 No.5 (2020-10)
ÆäÀÌÁö ½ÃÀÛÆäÀÌÁö(399) ÃÑÆäÀÌÁö(9)
ISSN 15982033
ÁÖÁ¦ºÐ·ù ½Ã°ø(Àû»ê)
ÁÖÁ¦¾î ÁßÀ¯µ¿ ÄÜÅ©¸®Æ®; °í¼º´É °¨¼öÁ¦; °íÇüºÐ·®; ·¹¿Ã·ÎÁö; Á¤Àû Ç׺¹ÀÀ·Â ; mid-fluidity concrete; rheology; segregation resistance; superplasticizer; solid concentration
¿ä¾à1 º» ¿¬±¸¿¡¼­´Â ÁßÀ¯µ¿ ÄÜÅ©¸®Æ® Á¦Á¶¸¦ À§ÇØ ±âÁ¸ÀÇ Àç·áºÐ¸® ÆÇÁ¤¹ý°ú ·¹¿Ã·ÎÁö Á¤¼ö¸¦ Ȱ¿ëÇÏ¿© ÄÜÅ©¸®Æ® Àç·áºÐ¸® »óȲÀ» Á¤ÀÇÇϰíÀÚ ÇÏ¿´´Ù. ÁßÀ¯µ¿ ÄÜÅ©¸®Æ®´Â ÀϹݰ­µµ¹üÀ§ÀÇ ºñ±³Àû ³ôÀº ¹°½Ã¸àÆ®ºñ Á¶°Ç¿¡¼­ ³ôÀº À¯µ¿¼ºÀ» ¹ßÇöÇÏ´Â Á¶°ÇÀ¸·Î °í¼º´É °¨¼öÁ¦¸¦ »ç¿ëÇϸ鼭 Àç·áºÐ¸®¸¦Á¦¾îÇÏ´Â °ÍÀÌ ¸Å¿ì Áß¿äÇÏ´Ù. ÀÌ¿¡ º» ¿¬±¸Á¶°Ç¿¡¼­´Â °íÇüºÐ·®ÀÌ ´Ù¸¥ µÎ °¡Áö °í¼º´É °¨¼öÁ¦¸¦ »ç¿ëÇÏ¿© ÀϹݰ­µµÄÜÅ©¸®Æ® ¹èÇÕÀÇ À¯µ¿¼ºÀ» ÁõÁø½ÃŰ¸é¼­ Àç·áºÐ¸®°¡ ¹ß»ýÇϱ⠽ÃÀÛÇÏ´Â ¹üÀ§ÀÇ À¯µ¿Æ¯¼º°ú ·¹¿Ã·ÎÁö Á¤¼öÀÇ º¯È­¿¡ ´ëÇØ °üÂûÇÏ¿´´Ù. ±âÁ¸ÀÇ ·¹¿Ã·ÎÁö¸¦ ÀÌ¿ëÇÑ À¯µ¿¼º ÃøÁ¤¿¬±¸´Â °íÀ¯µ¿¼ºÀ» È®º¸ÇÑ Á¶°Ç¿¡¼­ ÃøÁ¤µÇ¾î¾ß Ç߱⠶§¹®¿¡ Àç·áºÐ¸®°¡ ¹ß»ýÇÏ´Â Á¶°ÇÀº ÃøÁ¤ÀÇ ´ë»ó¿¡¼­ Á¦¿ÜµÇ¾ú´ø °æ¿ì°¡ ¸¹¾Ò´Ù. º» ¿¬±¸¿¡¼­´Â Àç·áºÐ¸®°¡ ¹ß»ýÇϱ⠽ÃÀÛÇϴ»óÅÂÀÇ ÄÜÅ©¸®Æ® ¹èÇÕÁ¶°Ç¿¡¼­ ±âÁ¸ÀÇ Àç·áºÐ¸® ÆÇÁ¤¹ýÀ̳ª°üÂû¿¡ ÀÇÇÑ ¹æ¹ýÀ¸·Î´Â ¾ÆÁ÷ Àç·áºÐ¸®¿¡ À̸£¸£Áö ¾Ê¾Ò´Ù°í ÆÇ´ÜµÇ´õ¶óµµ ·¹¿Ã·ÎÁö ÃøÁ¤ Á¤¼öÀÎ ¼Ò¼ºÁ¡µµ¿Í Á¤Àû Ç׺¹ÀÀ·Â ÃøÁ¤°ª¿¡¼­ ÀÌ»óÃøÁ¤°ªÀÌ °üÂûµÇ´Â °ÍÀ» È®ÀÎÇÏ¿´´Ù.
ÀÌ·¯ÇÑ °á°ú°¡ ÄÜÅ©¸®Æ®¿¡ À־ Àç·áºÐ¸®°¡ ¹ß»ýÇÏ´Â Á¶°ÇÀ» ·¹¿Ã·ÎÁöÀûÀ¸·Î Á¤ÀÇÇÒ ¼ö ÀÖ´Â ±âÃÊÀûÀÎ ÀڷḦ Á¦°øÇÒ °ÍÀ¸·Î ÆÇ´ÜÇÑ´Ù.
¿ä¾à2 The aim of the research is to provide the boundary conditions for segregation of normal strength grade and highfluidity concrete mixture (so called mid-fluidity concrete) with rheology parameters. Since the normal strength gradeconcrete mixture has a relatively high water-to-cement ratio and no SCMs, it is easy to be segregated whensuperplasticizer is added. Hence, to achieve the mid-fluidity concrete of normal strength grade and high fluidity,preventing segregation of the mixture is inevitable. In this research, using two superplasticizers with different solidconcentrations, the flow behaviors and rheological behaviors were assessed by increasing fluidity until the segregationhappened. According to the experiment in this research, an unusual behavior in rheology parameters was observedwhen the concrete mixture started to be segregated. From this results and report, it is expected to contribute on thedefinition of segregation with rheological test methods.
¼ÒÀåó Çѱ¹°ÇÃà½Ã°øÇÐȸ
¾ð¾î Çѱ¹¾î
DOI https://doi.org/10.5345/JKIBC.2020.20.5.399
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