CONSTRUCTION BENTONITE

Bentonite slurry is one of the most common excavation fluid used in constructing diaphragm wall. The gel strength and viscosity properties of the bentonite clay allow for cutting suspension and removal. Piling Grade Bentonite Powder is used traditionally as a support, lubricant agent in walls and foundations, tunneling and horizontal drilling. Viscosity and plasticity plays very important role. Bentonite slurry walls are used in construction, where the slurry wall is a trench filled with a thick colloidal mixture of Bentonite and water. The important characteristics of Piling Grade Bentonite Powder is that it covers large surface area, good plasticity and lubricity, low filter loss, excellent gel strength, good impermeability & low compressibility.

Liquid Limit IS:12446-1988 ml/100 gm 400 – 450
Moisture Content API Spec. 13A:2004/
ISO 13500: 1998
% by wt. 12.0 Max
Dry Screen Analysis
(residue on 75 um
sieve
IS:6186-1986% % by wt. 10.0 max.
Free Swelling Volume
2gm/100ml
ASTM D
5890:1995
ml 30 – 35
PH Value of 5% gel IS:6186-1986 pH 9.5 – 10.0
Loose Bulk Density IS:7589-1974 gm/ml 0.85 – 1.0
Gel Time 2.5gm/25 ml IS:12446-1988 second Instant
Filterate Volume API Spec.
13A:2004/ ISO
13500: 1998
ml 20 max
Viscosty at 600 rpm API Spec.
13A:2004/ ISO
13500: 1998
30 min
Methylene Blue Value API spe 131:2004/
ISO 10416:2002
mg/gm of
clay
350 – 400