DESCRIPTION        

  bentOKraft^® panels         are sodium bentonite panels designed to give dry structures below ground in contact with ground water and bleed water.

  bentOKraft^® panels         contain a controlled rate of 1,13 pound per square foot (>5,5 kg/m²) of granular sodium bentonite inside the flutes of the 4' x 4' x 3,15/16" thick (1,2m x 1,2m x 5,5 mm) corrugated kraft board.

  bentOKraft^® panels         are confined under slabs and against the concrete structures, when the ground backfill is placed.

In this confined situation, the expansion of bentonite is stopped (bentonite can swell only a little).
In this condition bentOKraft^® panels, in contact with water or humidity, become a high density colloidal GEL (this is a monolithic waterproofing clay membrane).
This GEL state is the effective leakproofing barrier because it is produced with the MINIMUM expansive capacity within its capability and at the same time it produces the MAXIMUM expansive force that will be realized during the lifetime of the structure.
When bentOKraft^® panels are confined, if settlement, shrinkage or seismic action cause small concrete cracks to structures below ground, the retained swelling potential allows bentOKraft^® panels to expand into these areas, sealing them off against water penetration:a true Self-healing system.

This inert mineral (natural sodium bentonite) is that, when in contact with water, if is unconfined will swell to many times its dry volume, 12 to 16 times in GEL state range.
  bentOKraft^® panels       when wrapped around the outside of a below ground structure and contained by backfill, the containing pressure, prevents free swell thus a tough impervious mastic GEL is formed, repelling all other water.
  bentOKraft^® panels       work by forming a low permeability clay membrane upon contact with water (K permeability = 7,86E^-10 cm/sec) .
  bentOKraft^® panels       are no toxic, do not pollute and contain zero VOC, can be installed in almost any weather condition.

APPLICATIONS

   bentOKraft^® panels     are designed for below-grade structural concrete foundation walls. 

Applications may include structures under continuous or intermittent hydrostatic pressure.
   bentOKraft^® panels     are not designed for below-grade masonry block walls.

Where contaminated ground-water or saltwater conditions exist, install bentOKraft^® panels_C&Sr (Contaminant & Saltwater resistant bentonite panels).

PRINCIPAL APPLICATIONS
   bentOKraft^® panels     are used to waterproof below-grade concrete structures in the building of habitation and / or factory structure foundation or for building of underground structures and/or tunnels such as:
- Basements
- Structural slabs (minimum 200 mm thick )
- Underground car parks
- Tunnels
- Subways
- Safety vaults
- Warehouses
- Underpasses
- Underground tanks
- Elevator pit
- Taverns
- Swimming Pool
- .........

PRODUCTS & DESCRIPTION of system
   bentOKraft^® panels    biodegradable corrugated kraft board filled with high-swelling granular sodium bentonite
    SperrJOINT^®,       NEW 100% pure sodium bentonite waterstop, coupled with a retarded hydration initiation, (USA - EU patent),  is a flexible concrete (cast in place), construction joint sealant that provides a permanent leakproofing barrier and that overcomes the disadvantages and typical drawbacks of the background art.

    Sperrbar             Sperrbar multipurpose waterstop, is a cylinder of soluble plastic film filled with natural sodium bentonite, used as reinforcement or specially application.

    Granular bentonite  granular sodium bentonite for making up bentOKraft^® partially hydrated paste or loose for remedial work.
      Fixer                 plastic lock-washer to fasten in place bentOKraft® panels .

If contamined ground-water or saltwater conditions exist, use Contaminant & Saltwater resistant PRODUCT  series _C&Sr:
         - bentOKraft^® panels   C&Sr
         - SperrJOINT^®            C&Sr

         - työJOINT^®              C&Sr
         - Sperrbar                 C&Sr
         - Granular bentonite    C&Sr

LIMITATIONS
Do not install bentOKraft^® panels in standing water or during precipitation.

If contamined ground-water or saltwater conditions exist, contact the Manufacturer; in this conditions use Contaminant & Saltwater resistant PRODUCT series _C&Sr.

Do not install bentOKraft^® panelss over decks, roofs, tunnels topped with rigid or poured wear surfaces, and similar situations.

Masonry or concrete block walls must have a minimum of 20 mm sand and cement render prior to fixing panels.

PERFORMANCE CHARACTERISTICS

    Hydrostatic resistance    a single course of bentOKraft^® panels is rated to withstand 10 meters of hydrostatic head.
For hydrostatic pressure greater than 10 meters, a double course of bentOKraft^® panels is required.

     Bridging ability        bentOKraft^® panels are capable of bridging cracks in concrete up to 1,5 mm.

     Application temperature    bentOKraft^® panels are unaffected by frost or heat.

PHYSICAL AND TECHNICAL FEATURES
Bentonite      natural sodium bentonite from WYOMING
- content of montmorillonite      > 90%
- pH                                     10,02
- expansion    in range of GEL state = 17 times (approx)   in range of SOL state = 42 times (approx)
- specific weight in bulk            1,1 Kg/l (approx.)
- liquidity limit                        % :           > 500
- specific surface                    1 cm³ of bentonite develop a surface of 2.500.000 cm²

bentOKraft^® panels           container  biodegradable corrugated kraft cardboard
- panel dimension     4' x 4' (1,2m x 1,2m )
- panel thickness      3,15/16" (5,5 mm )
- panel area            1,44 m²
- panel weight          9 Kg (approx.)
- panel content        natural sodium bentonite  

                            8,7 Kg /panel (approx.)
                            > 5,5 Kg / m² (approx.)
- Permeability (K)         7,86E^-10 cm/sec
- panels per pallet        85 N°
- pallet weight             770 Kg (approx.)
- total pallet area         122,40 m²
Contaminated water   - With saltwater condition or contamined ground water  consult Bellcast srl.
Storage
- Keep bentOKraft^® panels dry prior to their use.
  If outside protect top and sides with adequate polyethylene.

  Use block up or pallets of a sufficient height to prevent contact with ground surface water.
Storage life                 Indefinite under cover

Health and safety
- There are no health hazards associated with bentOKraft® natural sodium bentonite, products 

   in normal use.
   The extended contact with skin can cause a drying effect, the use of gloves is  recommended. In

   case of contact with eyes, wash with water and consult a doctor.
Toxicity                     - bentOKraft^® panels are non toxic in normal use.

bentOKraft^® panels      Installation guide / procedure   please contact Bellcast srl

Disclaimer

The contents in this technical litterature are based on real experiences and so they can be considered as valid even if they represent one small part of all the applicative possibilities.

It is so specified that the indications are by way of exemple only and they are not a responsability for the Producer and the Distributors all.

The contents in this technical litterature  can not prove some connection, or legal connection, or legal claim of any sort of warrantee, deriving from contract of buying and selling however expressed and formalized. 

The Orderer and/or USER is liable for the suitability of the Product for the use as expected and for the manner of use. 

Applicability of products will vary as a result of site conditions and installation procedures.

Final determination of the suitability of the information or material for use contemplated and of its manner of use, and whether the use infringes any patents is the sole responsability of the User.

The technical service of Bellcast srl is available to lend its collaboration for the preventive checks of suitability and for define application ways. 

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