Slurry walls are constructed using a cement-bentonite slurry to produce a below ground low permeability barrier.
![Slurry cut-off wall illustration](/sites/keller-group/files/styles/technique_half_page/public/2020-03/slurry-cut-off-walls.jpg?itok=0bM6MgqE)
Common uses
Process
A slurry cut-off wall or slurry trench wall is typically excavated using a backhoe while simultaneously pumping a cement bentonite mix into the trench to depths in excess of 25m. Once cured, the slurry cut-off wall provides a permanent low permeability barrier to groundwater and leachates.
Where gas migration is the issue a high-density polyethylene membrane is placed in the wall in panels connected with an interlock system.
Advantages
Quality assurance
Keller has decades of experience installing slurry walls across the globe.
A specially developed mix combined with a strict quality control ensures consistency and a product installed and designed to withstand the test of time.
Samples from the top and bottom of the trench are taken daily and a series of testing can be done including slump, specific gravity, bleed, shear strength and pH.