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http://dx.doi.org/10.14190/JRCR.2018.6.1.16

Study on Rheological Properties of Mortar for the Application of 3D Printing Method  

Lee, Hojae (Structural Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology)
Kim, Won-Woo (Structural Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology)
Moon, Jae-Heum (Structural Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.6, no.1, 2018 , pp. 16-24 More about this Journal
Abstract
In this study, an experiment was conducted to analyze mortar based rheology for 3D printing method application. The tendency of rheological properties due to the change of W/B, binder type, replacement ratio, and super plasticizer which have a great influence on the flow characteristics of concrete was experimentally analyzed. Experiments were carried out by dividing into paste and mortar. In the paste experiment, rheology was analyzed by setting W/B, binder type, replacement ratio, and super plasticizer dosage as main variables. In the mortar experiment, the rheological properties of W/B and sand ratio were analyzed. As a result, as the W/B was increased, the viscosity decreased and the FA ratio to replace FA increased and the viscosity increased. In order to increase the fluidity, substitution of only 5% of SF reduces the shear stress and the viscosity is reduced by about 83%. Mortar rheological evaluation shows that there is a critical section where a large change occurs in the W/B 30 to 40% section. Also, in the same W/B, it is analyzed that there is a critical section where the shear stress increases more than twice in the sand ratio of 50~60%.
Keywords
Rheology; 3D printing; Construction materials; Rheological properties;
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Times Cited By KSCI : 1  (Citation Analysis)
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