CAWS Clause J10-130

J10 CEMENTITIOUS MORTAR TANKING / DAMP PROOFING

To be read with Preliminaries / General conditions.

130 PROPRIETARY CRYSTALLINE ACTIVE MORTAR

Vandex Super / Super White

Vandex Super and Vandex Super White are of a similar nature. Whereas Vandex Super is based on grey Portland cement Vandex Super White uses white cement as a binding agent. All technical information of Vandex Super applies to also for Vandex Super White except for colour, bulk density and setting time.

Vandex Super is a surface-applied material which waterproofs and protects concrete in-depth. It consists of grey or white Portland cement, specially treated quartz sand and a compound of active chemicals. Vandex Super is supplied in powder form. Vandex Super can be applied to all structurally sound concrete – new or old. It may be applied to either the pressure or the non-pressure concrete face. Vandex Super may be used in conjunction with Vandex Premix. Typical areas of application are:

• Basement retaining walls
• Concrete slabs
• Construction joints
• Water retaining structures
• Swimming pools
• Sewage treatment plants
• Channels
• Bridges

When Vandex Super is applied to a concrete surface, the active chemicals combine with the free lime and moisture present in the capillary tract, to form insoluble crystalline complexes. These crystals block the capillaries and minor shrinkage cracks in the concrete to prevent any further water ingress (even under pressure). However, the Vandex layer will still allow the passage of water vapour through the structure, allowing the concrete to breathe. Vandex Super is approved for use in contact with potable water. Consult Safeguard Europe Ltd technical literature for details. Safeguard Europe Ltd can also provide a design and specification service and it is recommended that they are consulted early in the design process.

Substrate:

Sound stable surfaces.

Preparation:

All concrete to be treated with Vandex Super must be clean and have an ‘open’ capillary system. Remove laitance, dirt, grease etc by means of high pressure water jetting, wet sandblasting or wire brushing. Faulty concrete in the form of cracks, honeycombing etc must be chased out, treated with Vandex Super and filled flush with Vandex Unimortar 1. Surfaces must be carefully prewatered prior to the Vandex application. The concrete surface must be damp but not wet.

Manufacturer:

Product reference:

Vandex Super / Vandex Super White.

Coats:

Number:

For concrete surfaces to be back-filled – One coat of Vandex Super at 0.75 kg/m² followed by one coat of Vandex Premix at 1.00 kg/m².

For water retaining structures, internal concrete wall surfaces – Two coats of Vandex Super at 0.75 kg/m².

Concrete slabs – Vandex Super at 1.00 kg/m² applied in one slurry coat to hardened concrete or dry sprinkled and trowel applied to fresh concrete when this has reached initial set.

Construction joints – Vandex Super at 1.5 kg/m² applied in slurry or dry powder consistency immediately prior to placing the next lift / bay of concrete.

Blinding concrete – Vandex Super at 1.2 kg/m² applied in a slurry or dry powder consistency immediately prior to placing the overlying concrete slab.

Undercoats:

Types:

Vandex BB 75 Waterproofing Slurry.

Thickness:

Consult Safeguard Europe Ltd technical literature for details.

Application:

Finish:

Brushed / Power spray.

Other requirements:

Consult Safeguard Europe Ltd technical literature for details.