BCR Hydrophilic Bentonite Strip Waterstop 

BCR Bentonite Waterstops are designed to swell when exposed to water yet maintain a solid structural integrity that will not deteriorate due to uncontrolled expansion, This swelling ability prevents the passage of water through concrete construction joints. BCR waterstops are fast, easy, and economical to install. Simply firmly press the BCR waterstop to the primed surface and place your second pour of concrete. No splitting of forms or difficult field welding is necessary to achieve a watertight seal.
INSTALLATION
Surface preparation: Surfaces should be clean and dry. Remove all dirt, rocks, rust or other construction debris. Do not install BCR Waterstop-RX in standing water or on an iced substrate.
Adhesive: Application of adhesive as a continuous bead along the substrate where BCR Waterstop-RX will be installed. Assure proper 75 mm (3”) concrete cover will be maintained. Keep the nozzle tip pressed against the concrete at a 45o angle during application.
Installation: Remove release paper, then firmly press the entire length of BCR Waterstop-RX onto the adhesive. For vertical and overhead applications, firmly press a minimum of 15 seconds to assure adhesion. For best results
apply BCR Waterstop-RX within 15 minutes of adhesive installation. BCR Waterstop-RX must be placed into adhesive prior to skinning over and curing.
Tightly butt coil ends together to form a continuous BCR waterstop - do not overlap coil ends. Place in maximum practical lengths to minimize coil end joints. Where required, cut coils with a sharp knife or utility blade to fit
coil ends together. Make horizontal to vertical transitions by abutting product coil sections together, no special accessory pieces are required.
At structural and pipe penetrations, cut into strips to fit around the penetration. Apply to adhesive and abut coil ends together. On irregular surfaces such as stone or rough concrete, make sure BCR Waterstop-RX remains
in direct contact with the substrate along the entire installation. There should not be any air gap between the BCR Waterstop-RX and the substrate.

Even after repeated wet-dry cycles, it maintains a perfect seal thanks to its high rubber content. In addition to the standard version, variants also exist for use in seawater (saline concentrations up to 3%) and contaminated water. Both exist in a wide range of sizes.

MATERIALS

A.    Hydrophilic BCR Waterstop Strip: A swellable, conformable polyurethane/butyl blended rubber based material free of sodium bentonite.

B.  BCR Waterstop Physical Properties: 

PHYSICAL PROPERTIES HYDROPHYLIC BCR WATERSTOP:

Property                         

Typical Value    Color     Black

Size   25.4 mm x 12.7 mm x 4.9 m rolls

Packaging   10 rolls per carton

Hydrostatic Head Resistance 70 m (231 ft)

Wet - Dry Cycling  [25 Cycles @ 231 ft. (70 m)]

No Effect   Adhesion to Concrete : Excellent 

EXECUTION : EXAMINATION

A.    Do not begin installation until substrates have been properly prepared.

B.    Examine conditions of substrates and other conditions under which this work is to be performed and notify the Architect, in writing, of circumstances detrimental to the proper completion of the work.  Do not proceed with work until unsatisfactory conditions are corrected.

PREPARATION OF SUBSTRATES

A.    Clean surfaces thoroughly prior to installation.

B.    Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.

C.    Do not install BCR waterstop onto any substrates with standing water.

INSTALLATION

A.    Refer to manufacturer’s literature for recommendations on installation, including but not limited to, the following:

Construction Joint:

On irregular concrete faces, apply a (12 mm) bead of Adhesive as bedding.
Secure using masonry nails (40 mm – 50 mm) long with a washer (20 mm) in diameter.

fixings with (6 mm) nuts and (20 mm) diameter washers may also be used. Fixings should be spaced at a maximum of  (300 mm) centres with a minimum spacing that ensures proper contact to substrate.
 joints should overlap a minimum of (100 mm), ensuring full contact between jointed pieces.
 It  can be bent around corners; however on complex geometry use Adhesive to fill any gaps.
Any damaged sections should be removed and repaired with a new section.
Keep it dry prior to pouring concrete.

Pipe Penetration:

Adhesive must be applied to dry substrates only. Apply by brush to the substrate. Wait until surface is dry to touch, and then press BCR waterstop firmly into place.
 joints should overlap a minimum of (100 mm), ensuring full contact between jointed pieces.
Keep it dry prior to pouring concrete.

CLEANING AND PROTECTION

Protect membrane in accordance with manufacturer's recommendations until placement of concrete.
Inspect for damage just prior to placement of concrete and make repairs in accordance with manufacturer's recommendations.

BCR BENTONITE RX, Self expanding bentonite swelling  BCR waterstop bar, gives engineer a choice for fixing the BCR waterstop in a concrete joint after casting the first conc., avoiding the casting of kickers in the first cast.

It gives an option of performance in saline conditions too. 

If you have any questions, please do not hesitate to send us a message. sales@buildingchemicalresearch.co.uk,                                   https://bcrltduk.com/products-range/pvc-waterstops-by-bcr-ltd-uk/25.html