The variation of flow-dependent tensile behavior in radial flow dominant placing of Ultra High Performance Fiber Reinforced Cementitious Composites (UHPFRCC)

The present research is chiefly concerned with the flow-dependent tensile behavior of Ultra High Performance Fiber Reinforced Cementitious Composites (UHPFRCC). The situation of fabricating a thin square-sectioned UHPFRCC plate with radial flow was considered. Both experimental and analytical study was performed to verify the validity of the analytical approach for prediction of the tensile behavior. In analytical work, the variation of the fiber orientation distribution according to the flow was first explored, and the consequent variation of the tensile behavior was estimated. The combination of the resistance by the fibers and the matrix, considering a probability density distribution for the fiber orientation distribution across crack surface, was considered in the analysis. The rotational movement of fiber in the fluid cementitious matrix was also taken into account. The comparison between the experimental and analytical results demonstrated the effectiveness of the proposed analytical approach.