Effects of Bentonite Type and Xanthan Gum Content on Drag-reducing Slurry Properties
Drag-reducing thixotropic slurry plays an important role in supporting,filling and lubrica-ting in pipe jacking construction of underground integrated pipe gallery.The effects of the types and contents of bentonite—the main raw material in drag-reducing thixotropic slurry,on the properties of slurry were studied experimentally.The results show that the variation laws of the funnel viscosity,wa-ter loss and drainage rate of the slurry change with the content of sodium base,organic base and calci-um base bentonite are basically the same.The water loss performance of the slurry prepared by sodium base or organic base bentonite is better than that of calcium base bentonite,but calcium base benton-ite has better performance in the slurry funnel viscosity.The drainage rate of the slurry prepared by the three types of bentonites are similar.In addition,this paper also studied the influence of xanthan gum content on slurry properties,the experimental results show that the addition of xanthan gum can significantly reduce the water loss of thixotropic slurry and improve the funnel viscosity of slurry to a certain extent.
万方数据
维普
