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Çѱ¹µµ·ÎÇÐȸ / v.7, no.1, 2005³â, pp.31-38
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°æÈÇÏ´Â ÄÜÅ©¸®Æ®ÀÇ ¼öºÐÈ®»êµµ ¸ðÇü
( A Moisture Diffusivity Model of Hardening Concrete ) |
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| ÄÜÅ©¸®Æ®ÀÇ Å¸¼³ Á÷ÈÄ, »ó´ëÀûÀ¸·Î ÄÜÅ©¸®Æ®´Â ³ôÀº Áõ±â¾ÐÀ» °®°Ô µÇ¸ç, ÁÖÀ§ÀÇ ´ë±â´Â ³·Àº Áõ±â¾ÐÀ» °®°Ô µÈ´Ù. ÄÜÅ©¸®Æ®¿Í ´ë±â °£ÀÇ Áõ±â¾ÐÀÇ ÆòÇüÀ» À¯ÁöÇÏ·Á´Â ÀÛ¿ë ¶§¹®¿¡ ÄÜÅ©¸®Æ®ÀÇ Ç¥¸é¿¡¼ ´ë±â·Î ¼öºÐÀÌ À̵¿ÇÏ´Â Áõ¹ßÀÌ ¹ß»ýÇÑ´Ù. Ç¥¸é¿¡¼ ÀϾ´Â Áõ¹ß·Î ÀÎÇÏ¿© ÄÜÅ©¸®Æ®ÀÇ ³»ºÎ¿¡¼µµ Áõ±â¾ÐÀÇ Â÷À̰¡ ¹ß»ýÇϸç, ÀÌ·Î ÀÎÇÏ¿© ÄÜÅ©¸®Æ® ³»ºÎÀÇ ¼öºÐÀÌ ¼¼È÷ Ç¥¸éÀ¸·Î À̵¿ÇÏ´Â ¼öºÐÈ®»êÀÌ ÀϾ٠ÀÌ ¼öºÐÈ®»êÀÇ ¼Óµµ´Â ÄÜÅ©¸®Æ®ÀÇ ¼Ò¼º ±Õ¿, ¼öȵµ, °µµ¿Í °°Àº ¿äÀÎÀ¸·Î ÀÛ¿ëÇÏ¿© ÄÜÅ©¸®Æ®ÀÇ Ç°Áú¿¡ Å©°Ô ¿µÇâÀ» ¹ÌÄ£´Ù. º» ³í¹®¿¡¼´Â ÄÜÅ©¸®Æ® ¼öºÐÈ®»êÀÇ Áö¹è¹æÁ¤½Ä°ú ½Ç³»¿¡¼ ÃøÁ¤µÈ ÄÜÅ©¸®Æ®ÀÇ ¿Âµµ¿Í »ó´ë½Àµµ¸¦ ÀÌ¿ëÇÏ¿© ÃʱâÀç·ÉÀÇ ÄÜÅ©¸®Æ®ÀÇ ¼öºÐÈ®»êµµ¸¦ ¿ª°è»êÇÏ¿´´Ù. ¿ª°è»êµÈ ÄÜÅ©¸®Æ®ÀÇ ¼öºÐÈ®»êµµ¸¦ ÀÌ¿ëÇÏ¿© ÄÜÅ©¸®Æ®ÀÇ ¼öºÐÈ®»êµµ ¸ðÇüÀ» °³¹ßÇÏ¿´À¸¸ç, À̸¦ ÀԷ°ªÀ¸·Î »ç¿ëÇÏ¿© À¯ÇÑ¿ä¼Ò¹ý¿¡ ÀÇÇØ ÄÜÅ©¸®Æ®ÀÇ »ó´ë½Àµµ¸¦ °è»êÇÏ¿´´Ù. ±× °á°ú·Î¼ °è»êµÈ »ó´ë½Àµµ´Â ÃøÁ¤µÈ »ó´ë½Àµµ¿Í ´ëü·Î ÀÏÄ¡ÇÏ¿´´Ù. |
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| Concrete has higher vapor pressure than its surrounding ambient air immediately after placement. Moisture at concrete surface evaporates to the ambient air to adjust equilibrium of the vapor pressure between them. The moisture inside the concrete moves to the surface because the evaporation at the surface causes gradient of vapor pressure inside the concrete. Plastic cracking, degree of hydration, strength development, and others caused by velocity of the moisture movement significantly influences quality of concrete. In this paper, the moisture diffusivity of early-age concrete was back-calculated using governing equation of the moisture diffusion, and temperature and relative humidity of concrete measured in a laboratory. The moisture diffusivity of the concrete was modeled using the back-calculated moisture diffusivity. The relative humidity of the concrete calculated by finite element method (FEM) using the modeled moisture diffusivity as Input data coincided with the measured relative humidity well. |
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| Ű¿öµå |
| ÄÜÅ©¸®Æ®;¼öºÐÈ®»êµµ;Áõ¹ß;¿Âµµ;½Àµµ;concrete;moisture diffusivity;evaporation;temperature;humidity; |
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Çѱ¹µµ·ÎÇÐȸ³í¹®Áý / v.7, no.1, 2005³â, pp.31-38
Çѱ¹µµ·ÎÇÐȸ
ISSN : 1738-7159
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200515637508868)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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