Extrusion characteristics of fresh cement morter including four kinds of advanced fibers with high tensile strength were experimentally examined in comparison with standard cement mortar which consisted of Portland cement, standard silica sand, water methyl cellulose as visco additives and chrysotile as fiber ones. The productivity of cemet mortar with new advanced fibers is not so proper than that with chrysotile. It is possible to evaluate propriety for extrusion moulding through single shear characteristcs, The countermeasures for increasing choesion are necessary for holding the shape fo die opening.
