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Á÷Á¢ ÀÎ¹ß ½ÇÇèÀ» ÅëÇÑ ¹ÙÀÌ¿ÀÂ÷ È¥ÀÔ ÄÜÅ©¸®Æ®¿¡ ¸Å¸³µÈ GFRP º¸°±Ù°ú ÀÏ¹Ý Ã¶±ÙÀÇ ºÎÂø°µµ ºñ±³ / Bond Strength Comparison of GFRP and Steel Reinforcements Embedded in Biochar-Incorporated Concrete using Direct Pull-O ut Tests |
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º¹ÇսżÒÀ籸Á¶ÇÐȸ ³í¹®Áý, Vol.16 No.03 (2025-06) |
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½ÃÀÛÆäÀÌÁö(33) ÃÑÆäÀÌÁö(6) |
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GFRP º¸°±Ù; Á÷Á¢ Àιß; ºÎÂø Ư¼º; ºÎÂø ÀÀ·Â; ½½¸³ ; biochar concrete; GFRP rebar; pull-out test; bond strength |
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º» ¿¬±¸´Â ¹ÙÀÌ¿ÀÂ÷¸¦ È¥ÀÔÇÑ ÄÜÅ©¸®Æ®¸¦ ±¸Á¶¿ë Àç·á·Î Ȱ¿ëÇÒ °¡´É¼ºÀ» °ËÅäÇϱâ À§ÇØ, º¸°±ÙÀÇ Á¾·ù¿¡ µû¸¥ ºÎÂø ¼º´ÉÂ÷À̸¦ ½ÇÇèÀûÀ¸·Î ºÐ¼®ÇÏ¿´´Ù. À̸¦ À§ÇØ Á÷Á¢ ÀÎ¹ß ½ÇÇèÀ» ¼öÇàÇÏ¿´À¸¸ç, ½ÇÇè º¯¼ö·Î´Â ÄÜÅ©¸®Æ®ÀÇ Á¾·ù(ÀϹÝ/¹ÙÀÌ¿ÀÂ÷), º¸°±ÙÀÇÁ¾·ù(ö±Ù/GFRP), º¸°±Ù Á÷°æ(D13/D16)À» ¼³Á¤ÇÏ¿´´Ù. ½ÇÇè °á°ú, ÀÏ¹Ý Ã¶±ÙÀ» Àû¿ëÇÑ ½ÇÇèü¿¡¼´Â ¹ÙÀÌ¿ÀÂ÷ È¥ÀÔÀÌ ºÎÂø°µµ ÀúÇϸ¦ À¯¹ßÇÏ¿´À¸¸ç, ƯÈ÷ D13 º¸°±Ù¿¡¼ ¾à 30%ÀÇ °¨¼Ò°¡ È®ÀεǾú´Ù. ¹Ý¸é, GFRP º¸°±ÙÀ» Àû¿ëÇÑ ½ÇÇèü¿¡¼´Â ¹ÙÀÌ¿ÀÂ÷ ÄÜÅ©¸®Æ®¸¦ Àû¿ëÇÑ °æ¿ì ºÎÂø¼º´ÉÀÌ ¼ÒÆø Çâ»óµÇ´Â °æÇâÀ» º¸¿´´Ù. ¶ÇÇÑ º¸°±ÙÀÇ Á÷°æÀÌ Áõ°¡ÇÒ¼ö·Ï ÃÖ´ë ÀιßÇÏÁß ¹× Æò±Õ ºÎÂø°µµ°¡Áõ°¡ÇÏ´Â ¾ç»óÀÌ ÀϰüµÇ°Ô °üÂûµÇ¾ú´Ù. ÀÌ·¯ÇÑ °á°ú´Â GFRP º¸°±Ù°ú ¹ÙÀÌ¿ÀÂ÷ ÄÜÅ©¸®Æ®ÀÇ Á¶ÇÕÀÌ ±â°èÀû °áÇÕ·Â Áõ´ë¸¦ ÅëÇØ ±àÁ¤ÀûÀα¸Á¶ ¼º´ÉÀ» ¹ßÈÖÇÒ ¼ö ÀÖÀ½À» ½Ã»çÇϸç, ÇâÈÄ Áö¼Ó°¡´ÉÇÑ ÄÜÅ©¸®Æ® ±¸Á¶¹°ÀÇ º¸°¼³°è¿¡ ±âÃÊÀÚ·á·Î Ȱ¿ëµÉ ¼ö ÀÖÀ» °ÍÀ¸·Î ±â´ëµÈ´Ù. |
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This study investigates the bond behavior between reinforcing bars and biochar-incorporated concrete to assess its structural applicability. Direct pull-out tests were performed considering key variables: concrete type (normal/biochar), reinforcement type (steel/GFRP), and bar diameter (D13/D16). Results indicated that biochar concrete reduced bond strength in steel-reinforced specimens, with the D13 series showing a ~30% decrease. Conversely, GFRP-reinforced specimens exhibited a slight improvement in bond strength with biochar concrete. Additionally, both the ultimate pull-out load and bond strength increased with bar diameter. These findings highlight the potential of combining GFRP bars with biochar concrete to enhance mechanical interlocking and support the development of sustainable reinforcement systems for concrete structures. |