Making Buildings Dry With The Vandex® Range
DuraRend are pleased to be approved applicators of the Vandex range of cementitious waterproofing, protection and repair products.
Vandex products are now available Worldwide and have been used on numerous prestigious projects including The Channel Tunnel, Canary Wharf, and The World Bank.
Vandex products are produced under an ISO9001 / 14001 quality and environmental management system. Key products carry BBA approval and many are approved for use in contact with drinking water.
Areas of application for Vandex products include:
* Basement Waterproofing / Tanking (Newbuild)
* Basement Waterproofing / Tanking (Refurbishment)
* Tunnel Waterproofing (Newbuild)
* Tunnel Waterproofing (Refurbishment)
* Lift Pit Waterproofing (Newbuild and Refurbishment)
* Waterproofing Underground Car Parks
* Swimming Pool Waterproofing and Repair
* Reservoir Waterproofing
* Sewer / Manhole Refurbishment
* Sewage Treatment Works
* Waterproofing Concrete Planters
* Waterproofing / Sealing Construction and Expansion Joints
* Concrete Protection and Repair
How does waterproofing work?
Vandex cementitious waterproofing materials consist of ordinary Portland cement, carefully graded quartzite sands,and a blend of activating chemicals.Vandex has two types of waterproofing products:
1. Capillary active components which work by penetration of the product into the concrete to provide in-depth waterproofing as shown below.
2. Slurries and mortars which form a waterproofing barrier.
The waterproofing effect of the capillary active Vandex products is produced by the Vandex coating which forms a waterproof layer and by activation of the chemicals which penetrate the concrete capillaries by the osmotic pressure of water. Here the Vandex chemicals react with the free lime in the concrete forming chemical complexes which block the capillaries and voids. Permeation of liquid water is no longer possible whereas water vapour is still allowed to pass. In addition, Vandex waterproofing layers protect the concrete to a certain extent from exterior influences, such as carbonates, chlorides, sulphates and nitrates. Vandex becomes an integral part of the concrete structure, forming with the concrete a strong and durable homogeneous body.
1. Concrete wall exposed to water. The
water has forced its way into the capillaries.
Long-term effect: leaky, damaged concrete.
2. After Vandex treatment: The reaction
between the free lime, moisture and the
Vandex chemicals has set in. Vandex
penetrates the concrete forming chemical
complexes which substantially constrict the
capillaries.
3. The concrete is now watertight but still
allows water vapour to pass. The Vandex
chemical complexes remain in the concrete,
ready to reactivate upon water impact.