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2´Ü°è ¹èÇÕ¹æ¹ýÀÌ ¼øÈ¯ÀܰñÀç È¥ÀÔ ¸ð¸£Å¸¸£ÀÇ ¾ÐÃà°µµ¿¡ ¹ÌÄ¡´Â ¿µÇâ / Contribution of Two-Stage Mixing Approach on Compressive Strength of Mortar Made of Recycled Fine Aggregate |
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±èÀ¯Áø(Yu-Jin Kim) ; ±è±Ô¿ø(Gyu-Won Kim) ; Á¤Ã¶¿ì(Chul-Woo Chung) |
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Çѱ¹°Ç¼³¼øÈ¯ÀÚ¿øÇÐȸ ³í¹®Áý, Vol.8 No.4 (2020-12) |
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½ÃÀÛÆäÀÌÁö(490) ÃÑÆäÀÌÁö(8) |
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2´Ü°è ¹èÇÕ¹æ¹ý; ¼øÈ¯ÀܰñÀç; ÇÔ¼öÀ²; ¾ÐÃà°µµ ; Two-stage mixing approach; Recycled fine aggregate; Moisture content; Compressive strength |
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This work has been initiated to find possibility whether recycled fine aggregate can be used as a source of aggregate for structural concrete or not. Two-stage mixing approach was chosen in order to maximize strength potential from recycled fine aggregate. Moisture content of the recycled fine aggregate was changed, and two different types of two-stage mixing approaches were applied to produce cement mortar. The strength of mortar made of 100% recycled fine aggregate by two-stage mixin g approaches w as c ompared to t hat of m ortar made o f 100% w ashed sea san d. A ccordin g to t he r esults, the effect of moisture content on compressive strength was observed from low water cement mortar(W/C 0.3). In case of W/C 0.5 cement mortar, no clear relationship was observed between moisture content and strength development. It was found that two-stage mixing approach has a potential to increase the strength of mortar made of 100% recycled fine aggregate. In case of modified version of two-stage mixing approach which first prepares cement paste and pours recycled fine aggregate into the cement paste, was more effective to increase the strength of mortar made of 100% recycled fine aggregate. |