Bentonite CSR

Use

Use in cement bentonite sealing walls. For optimal efficiency the mixing water of the suspension should have the following properties:
Conductivity   ≤ 1000 µS/cm
pH    4,5 – 9,0

Description

The basis for this cement-stable bentonite quality is a specially selected, activated sodium bentonite.

Advantages

• Provides good trench stabilising properties during excavation phase.
• Prevents slumping of cement and soil particles during curing phase.
• Increases the water inhibiting properties of the wall.
• Increases the remodelling ability of the wall.

Specification

Bentonite CSR complies with the requirements set for bentonite in CUR publication 189.

Parameter	Method	Requirement	Typical Value
Water absorption capacity after 24 hours	ASTM E946-92	≥ 500 %	780 %
Methylene blue absorption	Test B CUR 33	≥ 220 mg MB/gram	300 mg MB/gram
Dry sieve analysis through 125 mµ	Draft NEN 33976	≥ 95 %	98 %
Cement stability	Test III CUR 189	Water separation after 2 hours ≤ 2.5 % (v/v)	1 % 2 %
Moisture content	DIN 18121	≤ 13,0 %	11,5 %

Chemical and physical properties

Composition	High-quality sodium activated bentonite
Colour	Beige
Form	Soft powder

Properties of the suspension

Bentonite CSR mixed with distilled water in various concentrations.

Parameter	Method	30 kg/m3	40 kg/m3	50 kg/m3	60 kg/m3
Liquid limit ball number	KugelharfengerätDIN 4126	1	1	2	3
Density	Mud balance	1,02 g/ml	1,03 g/ml	1,03 g/ml	1,04 g/ml
Filtrate water loss	DIN 4127	11,0 ml	9,0 ml	8,5 ml	8,0 ml
Marsh funnel API	API 13B Section 2	31 s	32 s	34 s	37 s

Packaging

• 1000 kg packed in 25 kg bags on a pallet with shrink film
• bulk