Fercanorte has available for the Angola and Mozambique markets a full range of sodium bentonite based waterproofing products, especially suitable for buried structures. These materials expand upon contact with water. Being confined between structural elements or between the later and the ground, they fill all the void spaces that may exist, forming a gel, and thus prevent the passage of moisture.
 
This combines two extremely important factors: the waterproofing of the inside of buildings and the protection of buried resistant structures (foundations and retaining walls) to oxidation and degradation of the reinforcement of concrete, which is increasingly seen as a requirement by structural designers.

VOLTEX SODIUM BENTONITE MEMBRANE:

Voltex is used on horizontal and vertical concrete surface waterproofing. It presents itself in three different varieties:

Voltex - sodium bentonite geosynthetic membrane, specially formulated to concrete structures waterproofing.

Voltex DS - improved geosynthetic membrane. To one of the conventional Voltex faces a high density polyethylene layer was added, dramatically reducing the material permeability. Recommended for when a double barrier against water entry is required.

Voltex CRDS - a special Voltex DS formula for high level of contamination and high electrical conductivity aggressive waters.



Voltex is supplied in 1.1 m x 5.0 m (192.5 m2) 35 roll pallets and may be produced in custom measures for big dimension special projects, as long as one of the dimensions is of 5.0 m and the other is between 1.1 m and 40.0 m. The product weight depends on the moisture content and may vary between 6 and 7 kg/m2


WATERSTOP EXPANSIVE JOINTS:

Waterstop expansive joints are meant to be used on the insulation of concrete casting unions, being confined between the existing concrete piece and the new piece to be casted. They present themselves in three forms:

Waterstop RX-101 - 20 mm x 25 mm rectangular cross-section. Supplied in 30 m boxes.

Waterstop RX-102 - 20 mm x 10 mm semi-circular cross-section. Supplied in 61m boxes.

Waterstop XP – for insulation of contaminated waters. 10 mm x 15 mm rectangular cross-section. Supplied in 48 m boxes.

RX101 and RX102, joints are attached to concrete using Revofix. metallic mesh. XP joint is applied either using Revofix metallic mesh or Cetseal sealent/adhesive.


GRANULAR BENTONITE AND BENTOSEAL:

To seal critical points (corners, holes, joints) granular bentonite may be used, either on its strand or water mixed paste forms, as well as the readymade bentonite and expansive polymer mixture, Bentoseal, specially indicated to be applyed on vertical surfaces and highly electrically conductive waters.