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Çѱ¹µµ·ÎÇÐȸ / v.6, no.4, 2004³â, pp.75-89
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( A Study for Controlling Early-age Temperature Rise of the Concrete Pavement by Shadow Tent in Hot Weather Construction )
Á¶¿µ¿À;±èÇü¹è;¼­¿µÂù;¾È¼º¼ø; (ÁÖ)·ÎµåÄÚ¸®¾Æ;Çѱ¹µµ·Î°ø»ç µµ·Î±³Åë±â¼ú¿ø;ÇѾç´ëÇб³ ±³Åë°øÇаú;µµ·Î±³Åë±â¼ú¿ø;
 
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ÄÜÅ©¸®Æ® Æ÷ÀåÀÇ Àå±â °ø¿ë¼ºÀº ½Ã°øÁ¶°Ç°ú ȯ°æÁ¶°Ç¿¡ Å©°Ô Á¿ìµÈ´Ù. Áï Ãʱ⿡ ¹«ÀÛÀ§ ±Õ¿­À̳ª ±Õ¿­Æ´ÀÌ ¸¹ÀÌ ¹ú¾îÁø °æ¿ì Æ÷Àå¼ö¸íÀ» Àú°¨½ÃŰ´Â ¿øÀÎÀÌ µÈ´Ù. ½Ã°ø´ç½ÃÀÇ ¿Âµµ¿Í ½Àµµ, ½Ã¸àÆ®¿Í °ñÀçÀÇ Á¾·ù, ¾ç»ýÁ¶°ÇµéÀº ÄÜÅ©¸®Æ®Æ÷ÀåÀÇ Ç°Áú¿¡ ¿µÇâÀ» ¹ÌÄ¡´Â Áß¿äÇÑ ¿ä¼ÒÀÌ´Ù. ±× Áß¿¡¼­µµ ´ë±â¿Âµµ¿Í ¼öÈ­¿­ÀÇ Áõ°¡¿¡ ÀÇÇÑ ³ôÀº ¿ÂµµÂ÷ÀÌ´Â ½É°¢ÇÑ Ãʱâ±Õ¿­À» ¹ß»ý½ÃŰ´Â ¿øÀÎÀÌ µÇ´Â °ÍÀ¸·Î ¾Ë·ÁÁ® ÀÖ´Ù. º» ¿¬±¸¿¡¼­´Â Â÷±¤¸·À» »ç¿ëÇÏ¿© ÄÜÅ©¸®Æ® ½½·¡ºêÀÇ ¿Âµµ¸¦ Á¦¾îÇÏ¿© Ãʱâ±Õ¿­ÀÌ ¹ß»ýÇÒ °¡´É¼ºÀ» ³¸Ãß°í ½½·¡ºêÁúÀÌÀÇ ¿ÂµµÂ÷ÀÌ¿¡ ÀÇÇØ ¹ß»ýµÇ´Â curling stress¸¦ ÁÙÀÏ ¼ö ÀÖ¾ú°í, °­µµ¿¡ À־´Â Â÷±¤¸· ¼³Ä¡ ±¸°£ÀÌ ÀϹݽðø±¸°£º¸´Ù Àå±â°­µµ¸¦ Å©°Ô ÇÒ ¼ö ÀÖÀ½À» È®ÀÎÇÏ¿´´Ù. ¶ÇÇÑ ÄÜÅ©¸®Æ®Æ÷ÀåÀÇ Æ÷¼³ ÈÄ 72½Ã°£ÀÇ °­µµ ¹× ÀÀ·ÂÀ» ¿¹ÃøÇÏ´Â ÇÁ·Î±×·¥ÀÎ HIPERPAV¸¦ »ç¿ëÇÏ¿© Ãʱ⿡ ±Õ¿­ÀÌ ¹ß»ýÇÒ °¡´É¼ºÀ» ºñ±³Çغ» °á°ú Â÷±¤¸·À» ¼³Ä¡ÇÑ ±¸°£ÀÌ º» ½ÃÇè½Ã°øÀÇ ¿¹¿¡¼­ ±Õ¿­ÀÌ ¹ß»ýÇÏÁö ¾ÊÀ» °¡´É¼º(reliability)ÀÌ Â÷±¤¸·À» ¼³Ä¡ÇÏÁö ¾ÊÀº ±¸°£(ÀϹݽðø±¸°£) 72.5%. Â÷±¤¸·¼³Ä¡ ±¸°£ 95%·Î ³ªÅ¸³ª Â÷±¤¸·¼³Ä¡ ±¸°£ÀÌ Â÷±¤¸·À» ¼³Ä¡ÇÏÁö ¾ÊÀº ±¸°£º¸´Ù ±Õ¿­ÀÌ ¹ß»ýÇÏÁö ¾ÊÀ» °¡´É¼ºÀ» Å©°Ô Áõ°¡½Ãų ¼ö ÀÖÀ» °ÍÀ¸·Î ºÐ¼®µÇ¾ú´Ù.
Long term performance of concrete pavement significantly depends on the given construction and environmental condition. It means that random cracks and extreme crack width due to inappropriate quality control at the early age might lead to decreasing the pavement service life. The temperature and moisture during the construction, cement and aggregate types, curing condition are major components to affect the quality of the concrete pavement at the early age. First of all, the high temperature differential, that is made by increasing air temperature and the heat of cement hydration, is known as the major contributor to severe cracks. In this study, tent covering was used for controlling temperature of the concrete slab. The field measurement data indicates that the effect of the tent covering is very significant to decrease possibilities of random crack occurrence and curling stress and enhance the long-term concrete strength. HIPERPAV(High PERformance PAVing software), a program predicting the strength and stress of an earty-age concrete pavement (72 hour after placement), is used for simulating the effects of tent covering. The HIPERPAVE results showed that the section with the tent covering has higher reliability than the section without the tent covering by 22.5%. In details, reliability is increased 72.5% (without the tent covering) to 95% (with the tent covering).
 
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Ãʱâ±Õ¿­;Â÷±¤¸·;°­µµ;½Å·Ú¼º;crack;tent covering;curling stress;concrete strength;reliability;
 
Çѱ¹µµ·ÎÇÐȸ³í¹®Áý / v.6, no.4, 2004³â, pp.75-89
Çѱ¹µµ·ÎÇÐȸ
ISSN : 1738-7159
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200415637517169)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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