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Cement-Bentonite Slurry

Cement-Bentonite Slurry

Cement-Bentonite Slurry

(OP)
Has anybody experience placing CB slurries underwater using a tremie method. I have experience tremie concreting of large steel pipe piles, placing structural concrete but not CB Slurry. I am interested to know if CB slurries could be placed by a tremie in 10 m deep casings (1 m dia)that contain about 5 m of groundwater. My question stems from ather low density of CB slurries if they could provide a front to push water upwards without mixing with water. Thank you in advance.

RE: Cement-Bentonite Slurry

It has already been done, in my case replace bentonite slurry by BC slurry in a slurry wall 50 deep and 1 m wide. You must be sure that your CB slurry is stable which means good hydratation of mother bentonite slurry and enough cement ( around 180 to 200 kg per m3).Obviously you will get, just like with concrete, some "bad" CB slurry/water mix on top.

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