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Çѱ¹µµ·ÎÇÐȸ / v.11, no.3, 2009³â, pp.41-49
½Ã¸àÆ®ÄÜÅ©¸®Æ® Æ÷ÀåÀÇ °í°­µµ °í³»±¸¼ºÀ» À§ÇÑ ±âÃÊ ¿¬±¸ : Part I ÃÖÀû¹èÇÕ¿¡ °üÇÑ ¿¬±¸
( Fundamental Study on High Strength and High Durability Cement Concrete Pavement : Part I Optimum Mix Proportions )
À±°æ±¸;¹Úö¿ì; °­¿ø´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;°­¿ø´ëÇб³ °Ç¼³°øÇкΠÅä¸ñ°øÇÐ;
 
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±¹³»¿¡¼­ ½Ã¸àÆ®ÄÜÅ©¸®Æ® Æ÷ÀåÀÌ Â÷ÁöÇÏ´Â ºñÀ²ÀÌ Áõ°¡ÇÏ´Â ¼öÁØ¿¡ ºñÇÏ¿© ÀÌÀÇ ±â¼úÀûÀÎ ¹ßÀüÀº »ó´ëÀûÀ¸·Î µÚÃÄÁ® ÀÖ´Ù°í ÇÒ ¼ö ÀÖ´Ù. ¶ÇÇÑ, »ç¿ë±â°£ÀÇ Áõ°¡¿Í ÇÔ²² ¿©·¯ °¡Áö ±â¼úÀûÀÎ ¹®Á¦Á¡µµ ºÎ°¢µÇ°í ÀÖ´Â ½ÇÁ¤ÀÌ´Ù. ÀÌ¿¡ º» ¿¬±¸¿¡¼­´Â ¿Ü±¹ÀÇ ÄÜÅ©¸®Æ®Æ÷Àå ¹èÇÕÀÇ Æ¯¼ºÀ» ºÐ¼®Çϰí À̸¦ ±âÃÊ·Î Çѱ¹ÀÇ ½ÇÁ¤¿¡ ºÎÇÕÇÏ´Â Àå¼ö¸íÀÇ °í°­°í °í³»±¸¼ºÀÇ ÄÜÅ©¸®Æ® Æ÷ÀåÀÇ ÃÖÀû¹èÇÕÀ» µµÃâÇϰíÀÚ ÇÏ¿´´Ù. ´ÜÀ§½Ã¸àÆ®·®, ÀܰñÀçÀ²(S/a), ±×¸®°í ¹°-½Ã¸àÆ®(W/C)ºñ µîÀ» º¯¼ö·Î ÇÏ¿© ¹èÇÕ¿¡ ´ëÇÑ ½ÇÇèÀû ¿¬±¸¸¦ ¼öÇàÇÏ¿´´Ù. Àå±âÀûÀÎ °ø¿ë¼ö¸íÀ» È®º¸ÇÏ°í °í°­µµ °í³»±¸¼ºÀÇ Æ÷ÀåÀ» À§ÇÏ¿© ¿ì¼±ÀûÀ¸·Î ´ÜÀ§½Ã¸àÆ®·®À» 375kg/$m^3$, 400kg/$m^3$, 425kg/$m^3$ ¼öÁØÀ¸·Î Áõ°¡½Ãų °ÍÀ» ±ÇÀåÇÑ´Ù. ¶ÇÇÑ, ÃÖÀû¹èÇÕÇ¥´Â Æ÷À埼³ Àåºñ¸¦ Ȱ¿ëÇÏ¿© Æ÷¼³ÇϹǷΠ½½·³ÇÁ 40mm·Î °áÁ¤ÇÏ¿´°í, µ¿°áÀ¶ÇØ ¹æÁö¸¦ À§ÇÏ¿© °ø±â·®À» 5%·Î °áÁ¤ÇÏ¿´´Ù. ¶ÇÇÑ ½Ã°ø ½Ã Àç·á ¼ö±ÞÀÇ ¿øÈ°ÇÔÀ» À§ÇÏ¿© ±½Àº°ñÀç ÃÖ´ë Ä¡¼ö¸¦ 25mm·Î °áÁ¤ÇÏ¿´´Ù. µµ·ÎÀÇ Àå¼ö¸íÀ» À§ÇÑ °í°­µµ ¹èÇÕÀ» À§ÇØ ³·Àº W/Cºñ¿Í ´ÜÀ§½Ã¸àÆ®·®ÀÇ Áõ°¡°¡ ¿ä±¸µÇ´Âµ¥, ¿¹ºñ½ÇÇè °á°ú °ø±â¿¬ÇàÁ¦¿Í Æú¸®Ä«º»»ê°í¼º´É AE°¨¼öÁ¦¸¦ »ç¿ëÇÏ¿© W/Cºñ¸¦ 0.4±îÁö ³·Ã߾ Áõ°¡µÈ ´ÜÀ§½Ã¸àÆ®·®¿¡ ´ëÇÏ¿© ÃæºÐÈ÷ ¸ñÇ¥ ½½·³ÇÁ¸¦ °¡Áö´Â ¹èÇÕÀÌ °¡´ÉÇÑ °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ¿¹ºñ ½ÇÇè °á°ú S/a¸¦ 0.34±îÁö ³·Ã߾ °ñÀçÀÇ ºÐ¸® µî ¹®Á¦¸¦ º¸ÀÌÁö ¾Ê°í ÃæºÐÈ÷ ¹èÇÕÀÌ °¡´ÉÇÏ¿´À¸¸ç, ÀÌ´Â ´ÜÀ§ ½Ã¸àÆ®ÆäÀ̽ºÆ® ¾çÀÇ Áõ°¡·Î ÀÎÇÑ Á¡Âø·Â Áõ°¡¿Í ¿öÄ¿ºô¸®Æ¼ÀÇ Çâ»ó¿¡ ÀÇÇÑ °ÍÀ¸·Î ÆÇ´ÜµÈ´Ù.
Cement concrete pavement has become more common in Korean highway systems. However, as its service period increases, there are some technical problems occurs and no clear solution is available primarily due to the lack of active researches. This research, hence, aims to develop a new mix proportion that may provide better strength and durability with extended service life. Based on a variety of literature reviews, the experimental variables were determined as unit cement content, S/a ratio and W/C ratio. From the experimental works, it is recommended to increase the unit cement content up to 375kg/$m^3$, 400kg/$m^3$ and 425kg/$m^3$. The target slump and air content were set 40mm and 5%, respectively. The maximum size of coarse aggregate was decided to be 25mm because of the easiness of supply in the field. The reduction of W/C ratio was necessarily required and decreased to 0.4 which was proven not to cause any mixing problem with the increased unit cement contents along with polycarbon-based high range water reducing agent. In addition, it was known that the S/a ratio could be reduced to 0.34. The lowered S/a might be possible because of the increased cement paste and hence increased cohesiveness and workability.
 
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Çѱ¹µµ·ÎÇÐȸ³í¹®Áý / v.11, no.3, 2009³â, pp.41-49
Çѱ¹µµ·ÎÇÐȸ
ISSN : 1738-7159
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200929535567881)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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