Proportional optimization of polymer-modified bentonite slurry in pipe jacking

The polymer-modified bentonite slurry has good rheological and thixotropic properties, which can adequately perform its functions of lubrication and support in pipe jacking construction. Therefore, it is widely used in construction due to its high efficiency. For different construction environments and geological conditions, it is difficult to form a unified slurry proportioning. Based on the requirements of slurry characteristics, the effects of sodium carboxymethyl cellulose (CMC), polyacrylamide (PAM) and guar gum on slurry characteristics are investigated. Within the suitable range of funnel viscosity and filtration loss, the prediction formula is proposed, and the correlation analysis is conducted, which can provide a reference for the preparation of slurry proportioning in engineering applications.