Abstract: Aiming at the phenomenon that the rheological behavior of paste is difficult to be measured factually,an inclined pipeline test device which can rebuild the industrial sites effectively was manufactured to survey the rheological parameters of the paste.The influencing law of paste concentration and cement-sand ratio on the rheological properties of the pastes was investigated by path analysis method.The result showed that:the influence of paste concentration and cement-sand ratio on the rheological parameters of the paste is positive correlation;The influence of concentration on yield stress is an order of magnitude larger than that of cement-sand ratio;When the cement-sand ratio approaches to 1∶25,the increase and decrease of cement-sand ratio does not cause obvious monotonically increasing and decreasing phenomenon of yield stress;The influence of concentration on plastic viscosity is higher than that of cement-sand ratio,under the same order of magnitude;When the paste concentration is low,a phenomenon of low concentration with large viscosity will be generated.

Key words: Paste backfill, Inclined pipeline, Rheological behavior, Path analysis