Holds the panel open
The trench is kept full of slurry as it is dug. Its pressure on the trench sides keeps the ground in place, and a trench that holds its shape takes less concrete to fill.
Bentonite powder for diaphragm walls
Holds each panel open until the concrete is in.
Send us your panel details and water analysisWhat bentonite slurry does in a diaphragm wall
Keeps the slurry in the trench
A thin filter cake forms on the trench sides, so little slurry is lost into the ground.
Gives way to the concrete
The concrete goes in by tremie from the bottom up and pushes the slurry out ahead of it.
Pick the grade by your water
Fresh water takes Pileman® at 50 kg per m³, and so does hard water after soda ash pre-treatment; brackish water up to 16,000 ppm takes Pileman® BH. If the ground changes partway down, add our polymers instead of changing the bentonite.
Comes in bags or jumbo bags
Pileman® comes in 25 kg bags, or 1,300 kg jumbo bags. A container takes 26.4 tonnes net in 25 kg bags and 26 tonnes net in jumbo bags. See the packing options.
Not sure of your water, or above 16,000 ppm?
Send us the water analysis. The technical desk reads it and replies within 1 working day.
Made by us. Checked by others.
Since 1994
A manufacturer, not a trader. Bentonite at Bhuj, polymers at Domjur.
ISO 9001:2015
All our plants are quality management system certified.
Star Export House
Recognised by the Government of India. We ship through Mundra and Kandla.
Own mine, Kutch
The clay in every bag comes from our own reserves in Kutch.
Pileman®, and its figures at 50 kg per m³
One grade for diaphragm-wall slurry in fresh water. The slurry figures below are at 50 kg per m³ in fresh water, with no ageing time.
- 50 kg/m³dose
- 45″Marsh viscosity
- 23 mlAPI filtrate
- 110 bbl/shtyield
- 20 minto ready
Frequently Asked Questions
Which bentonite is used for diaphragm wall slurry?
Pileman®, a sodium-activated bentonite made by extrusion, for diaphragm walls, bored piles and similar vertical drilling in fresh water. For brackish water up to 16,000 ppm, Pileman® BH.
Why is bentonite slurry used in diaphragm wall construction?
Bentonite slurry holds each diaphragm-wall panel open while it is dug and until the concrete is in. Its pressure on the trench sides keeps the ground in place, a thin filter cake means little of it is lost into the ground, and the concrete, placed by tremie from the bottom up, pushes it out of the trench.
Is a diaphragm wall the same as a slurry wall?
Often, yes: “slurry wall” is a common name for a structural diaphragm wall, because its panels are dug under bentonite slurry. The same name is also used for a slurry cut-off wall, which is a different job: a barrier against groundwater, not a structural wall, with its own grade, VodaSeal™-SCB.
How much Pileman® do I need per m³ of diaphragm-wall slurry?
50 kg per m³: mix 50 kg of Pileman® into 1,000 litres of fresh water, and the slurry is ready for the panel within 20 minutes.
What if my site water is hard or brackish?
For hard water, pre-mix soda ash (light) into the water, then use Pileman®. For brackish water, use Pileman® BH. With soda ash pre-mixed into the water, it mixes straight into brackish water up to 5,000 ppm. Up to 16,000 ppm, hydrate it in fresh water first, then drill. Above 16,000 ppm, send us a water analysis.
What do I add when a panel loses slurry into sand or gravel?
Add a polymer to the same slurry rather than changing the bentonite: Pileman® has no polymer in it but is made to work with one. AM-PAC™ controls fluid loss and Easy-Bore™ gel thickens the slurry, in fresh water. If a panel is losing whole slurry into open gravel, send us the ground report and the technical desk will suggest a fix.
Why price diaphragm-wall bentonite per m³ of slurry, not per tonne?
Because the wall pays for slurry, not for bags. A good bentonite needs a lower dose and seeps less into the ground, so each panel needs less slurry to finish, and a trench that holds its shape takes less concrete to fill. That total, not the bag price, is your real cost. Send us your panel sizes and ground, and the technical desk will work the numbers with you.
Who supplies Pileman®?
Amrfeo Private Limited, a manufacturer since 1994, makes and exports Pileman®, supplying buyers across the Gulf, Europe and Asia. The bentonite is mined and processed at our plant at Bhuj, Kutch, Gujarat, under ISO 9001:2015.
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