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½Ã¸àÆ® °è¿ Àç·áÀÇ Á¡µµ ÀúÇÏ¿ë È¥ÈÀç·á·Î¼ Æó¼®È¸¼® ¹ÌºÐ¸»ÀÇ »ç¿ë °¡´É¼º ºÐ¼® / Feasibility Analysis of Wasted Limestone Powder as a Viscosity Reducing Material for Cement Based Materials |
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ÀÌÇâ¼±(Hyang-Seon Lee) ; ÀüÁ¾¿î(Jong-Un Jeon) ; ¼Õ¹è±Ù(Bae-Geun Son) ; Çѵ¿¿±(Dongyeop Han) |
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Çѱ¹°Ç¼³¼øȯÀÚ¿øÇÐȸ ³í¹®Áý, Vol.6 No.2 (2018-06) |
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½ÃÀÛÆäÀÌÁö(123) ÃÑÆäÀÌÁö(7) |
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¼Ò¼ºÁ¡µµ ; »ê¾÷ºÎ»ê¹° ºÐ¸» ; ÀúÁ¡µµÇü °í¼º´É °¨¼öÁ¦ ; °í¼º´É °¨¼öÁ¦ ; °í¼º´É ½Ã¸àÆ® ÆäÀ̽ºÆ® ; Plastic viscosity ; Byproduct powders ; Low viscosity type water HRWR ; High range water reducer ; High performance cement paste |
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The aim of the research is providing a fundamental idea of reducing viscosity of cement based materials by replacing powder based material. With developing concrete technology, high performance concrete with high solid volume fraction has been used widely. Under the conditions of the high solid volume fraction due to the low w/c and replacement of SCMs, decreased fluidity is one of the critical problem, and thus plasticizer has been used to improve fluidity of the mixture. However, in rheological aspect, the fluidity of cement based materials can be defined with yield stress and viscosity, and using plasticizer only decreases yield stress without least controlling on viscosity. Therefore, based on the idea of Krieger-Dougherty model, a feasibility of wasted limestone powder from cement manufacturing process was used to decrease the viscosity of the mixture by replacing cement powder. According to a series of experiment, by replacing wasted limestone powder solely, there was a possibility of reducing viscosity was observed. Thus, in this research scope, it is considered to contribute on providing a fundamental idea of reducing viscosity with powder replacement and it is expected to contribute on further research using various conditions of replacing powders for reducing viscosity of cementitious materials. |