Obtained from the research on oilfield drilling fluids as a way to improve colloidal and rheological properties of bentonite (sodium montmorillonite) mud (slurry), the polymer based synthetic fluid reached a point that itself can work as a substitute of mineral slurry on excavations for foundations of engineering structures.
The use of this type of fluid in the geo-construction industry was born from the need to find a new solution with less environmental impact and at the same time improve the final results (improving excavation geometry, decreasing concrete consumption and allowing increase in production).
This article intends to clear old myths and old fashioned mindsets about the characteristics, how to use and in which aspects can the use of polymer slurry be more advantageous than bentonite slurry on soil stabilization. Moreover we will look into the potential that is inherent to the synthetic fluids and the future progress that is expected. The advantageous characteristics of this technology allow a reduced environmental footprint with a wider capability for problem solving. These fluids will, in the near future offer a real complete and optimized solution, for all soil conditions and project requirements, almost tailor-made to each case scenario and foundation contractor.
Subjects: drilling fluids; polymer; bentonite; composed slurries; soil stabilization; deep foundations
Author: Eonio Trindade, Technical Team Leader (Eng.)
Publisher: DFI, EFFC