In this study, the J shaped tube test apparatus was developed to evaluate therheological characteristic of the high-fluidity concrete by measuring the flowviscosity coefficient and the shear stress yielding value of the concrete.To examine the applicability of this test method, many kinds of the high-fluidityconcrete are investigated experimentally .As the result, the flow viscosity coefficientand the shear stress yield value of many kinds of the high-fluidity concrete areobtained, which are found to be similar to the values of the rotary viscometer.And therheological consideration about these results is carried out, comparing the results ofthe conventional test method.
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