In this study, we performed various patterns paste flow analysis using FEM. After that, we performed correlation analysis on a relationship between flow characteristics and rheological constants obtained from FEM analysis. Correlation analysis revealed that there is a strong relationship between yield stress and flow value, and between plastic viscosity and paste density and flow arrival time. we investigated these relationships by actual test results (flow test and rheological test) using cement paste, and we proposed a rheological constants estimation equations. In addition, the effectiveness of estimation equations were confirmed by reproducing the actual flow test results using MPS.

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In this study, we assumed that the cement paste and mortar are continuums and proposed a rheological constants estimation equation that can be applied to both cement paste and mortar. After that, the effectiveness of the proposed equations was verified using MPS analysis, and the effectiveness was confirmed in cement paste and low-fluidity mortar. However, for high-fluidity mortar, the actual measurement results could not be reproduced well by MPS analysis. In the case of high-fluidity mortar, the actual measurement results could be reproduced well in the MPS analysis considering thixotropy .

In this study, the flow curve of cement paste was obtained by using a rotational viscometer for the purpose of expressing the flow characteristics of cement paste. The rheological constant was obtained by approximating this flow curve by Bingham model. Using the obtained rheological constants as input values, the cement paste flow test results were analytically reproduced by the proposed marker particle viscoplastic finite element method. The results obtained by the analysis agreed well with the experimental results. Therefore, it was found that the marker particle visco-plastic finite element method and the rheological constants obtained by the experiment are effective.