宾汉姆体的缓凝砂浆在单螺杆挤出机中的流动

在实验的基础上，研究了宾汉姆体的缓凝砂浆在单螺杆挤出机中的流动；运用流变学理论， 建立了缓凝砂浆螺旋输送物理模型；对缓凝砂浆螺旋输送与包裹机构的工作机理进行了分析 与研究，得出了缓凝砂浆连续输送的条件，螺杆转速必须大于临界转速. 实验发现：宾汉姆 体的缓凝砂浆在螺旋输送与包裹机构中当螺杆转速在78$\sim$240\,r/min范 围内可实现连续输送和包裹.

Binghaw flows of retarded adhesive mortar in a single-screw extruder

The paper explores the flow for retarded adhesive mortar with Bingham liquid in a single-screw ectruder on the basis of test. By using the theories of rheology, the model of retarded adhesive mortar screw conveying is built. Discussed the principle for retarded adhesive mortar by screw conveying, the condition of successive conveying retarded adhesive mortar is obtained, i.e. the screw revolutions must exceed the critical revolutions. The test results suggest that it can be relized successive conveying and coating for retarded adhesive mortar with Bingham liquid in the mechanism of retarded adhesive mortar screw conveying and coating, when the screw revolutions are within 78$\sim $240\,r/min. The findings of these investigations resolve the reliability problem of retarded adhesive mortar screw conveying and lay the foundation for developing the coating device of retarted adhesive prestressed strand.