新拌水泥砂浆可近似看作宾汉姆流体，其流变参数的表征对于研究砂浆和混凝 土的工作性能具有重要意义． 文中通过测定每 100mL 砂浆在其上部砂浆重力作用下从漏 斗中流出的速率来绘制流变曲线，经过线性拟合得到砂浆的塑性黏度和屈服应力来对砂 浆的流变性能进行表征;研究了装料筒下料口直径和接料量筒内径对测试结果的影响，并 与旋转黏度计法所得结果进行比较，分析了文中方法的可靠性与可重复性． 结果表明:文 中方法的测试结果不受砂浆中砂粒大小的影响，可重复性好;所选测试条件为自身重力下 的低剪切速率条件，与混凝土的施工性能状态更为接近;两种方法所测塑性黏度、屈服应 力的绝对值虽有差异，但在比较样品间流变参数大小的规律方面是一致的．

As fresh mortar can be seen as a typical Bingham fluid,the characterization of its rheological parameters plays an important role in the research of the working performance of mortar and concrete.In the investigation,a flow curve is drawn by measuring the falling rate of 100mL mortar from a funnel under the weight of upper mortar,and the plastic viscosity and yield stress of mortar can be obtained through linear fitting to characterize the rheologi- cal properties of mortar.Then,the effects of the diameter of spout calibers and the inner diameters of splice cylin- ders on the test results were revealed,and the results are compared with those obtained by using a rotational vis- cometer.Finally,the reliability and repeatability of the proposed method are analyzed.The results show that (1) the sand size produces no influence on the test data of the proposed method,and the repeatability is good; (2) the test condition of the proposed method is a low shear rate under its own weight,which is similar to the actual work condition of concrete; and (3) although the absolute values of both the plastic viscosity and the yield stress which are obtained through the proposed method are different from those obtained by using the rotational viscometer,the change rules of the rheological parameters of the two methods are consistent.