Waterproofing, Corrosion Protection, and Restoration Cementitious Coating
Description
AD-TEK R is a unique penetrative cementitious coating specially designed for the waterproofing, protection, and repair of old and new concrete.
AD-TEK R prevents the penetration of water and other liquids into the concrete by causing reactions that produce non-soluble cementitious formations within the pores and capillaries of concrete.
Uses
- Concrete water reservoirs
- Water treatment and sewage plants
- Swimming pools
- Roof decks
- Underground tunnels
- Foundations
- Chemical and fertiliser plants
- Bridge pylons, beams, and decks
Benefits
- Forms an indivisible body with the base concrete
- Significantly increases impermeability of concrete
- Resists extreme hydrostatic pressure from either positive or negative surface of the concrete slab
- Can be applied to the positive and negative side of the concrete surface
- Can seal hairline cracks up to 0.5 mm
- Enhances the properties of the concrete against reinforcement corrosion
- Significantly reduces chloride penetration
- Allows concrete to breathe
- Does not require a dry surface
- Has a life greater than 10 years
Properties of Applied Coating
| Property | Value |
|---|---|
| Appearance | Grey powder |
| Grain Size | Max 0.6 mm |
| Layer Thickness | 1.5-5.0mm |
| Fresh Wet Density | Approx 2200 kg/m3 |
| Mixing Water per 20 kg pail | 3.3-3.7 litres |
| Working Time | 30 minutes |
| Temperature for application | From 5 to 40 deg Celsius |
| Final hardening | 4-8 hours |
| Impermeability | Waterproof according to DIN 1048 |
| Chloride ion diffusion | Reduced approx 2 times according to NT Build 443-1955-11 |
| Impact abrasion | Resistance is significantly increased according to AS/NZS 4469.9.2003 |
| Compressive strength (MPa) |
|
| Flexural strength (MPa) | 28 days: 6.8 |
| Bond strength (MPa) | 28 days: 5.0 |
| Carbonation | Resistance is significantly increased according to “Colourmetric method” |
| Water absorption | Decreased by approx 3 times |
| Steel reinforcement | Steel corrosion is inhibited (Polarisation curves method) |
| Crack resistance | Crack resistant according to “Ring Method” |
| Acidic medium resistance at pH 3-4 | Approx 2 times higher than conventional Portland cement mortar |
| Potable water | Approved for use by AWQC |
Installation
Surface Preparation
- Remove any weak, spalling, unconsolidated concrete and any existing coating; and thoroughly clean the surface
- If steel reinforcement is exposed, remove any rusting on the steel surface
- If patching is required, please patch with AD-TEK HB or HB-T (AD-TEK R is a coating only)
- Concrete must have open capillaries and a rough surface. If the surface is too smooth or covered with oily matter, lightly sandblast, acid etch, or water pressure the concrete
- Hose the concrete surface to fully impregnate with water and allow drying to a wet dull lustre and puddle-free state
Priming
We recommend priming as a part of the installation process described below. AD-TEK H (as a primer) is applied on the concrete substrate to passivate the steel reinforcement embedded beneath the concrete and completely harden the concrete surface, creating an appropriate adhesion platform and increasing bond strength of the AD-TEK R coating.
- Apply AD-TEK H at the rate of one litre per 3-5 square metres on the dry touch concrete substrate to fully impregnate with AD-TEK H (instead of water impregnation in the process of surface preparation) and allow drying to a wet dull lustre and puddle-free state
Mixing Equipment
Low shear mechanical mixer
Mixing Instructions (20 kg AD-TEK R)
- Normal water requirement is 3.3-3.7 L per 20 kg pail depending on required viscosity
- Place 3 litres of water in a clean mixer bucket
- While stirring gradually add AD-TEK R and mix thoroughly for 2-3 minutes
- If necessary, add additional water until a mix of the desired workability is obtained
- Mix for a further minimum of 1 minute
- Use within 30 minutes
Application
Apply by bagging, trowel or spray to a wet, puddle-free surface, at a thickness of between 1.5 and 5 mm.
Note: If a shorter cure time is required for hydraulic concrete, AD-TEK R can be applied to a dry surface by vigorous bagging and smoothing by trowel if necessary.
Curing
- Keep damp for at least 5 days and provide suitable protection against extreme weather conditions (sun, wind, frost) while setting
- The freshly treated surface should be protected from rain for a minimum period of 24 hours
Finishes containing Portland cement may be applied over AD-TEK R following the curing period but other paint and coating finishes should not be applied before 28 days.
Packaging, Shelf Life and Storage
AD-TEK R is available in 20 kg plastic pails.
AD-TEK R has a shelf life of 12 months if kept in an original unopened container in a dry store in sealed plastic pails.
Please contact our technical department for further information.
Safety Information
Thoroughly read the MSDS before use.
Disclaimer: Any advice, recommendation, information, assistance or service provided by application is in good faith and is believed by AD-TEK PTY LTD to be appropriate and reliable. However, any advice, recommendation, information, assistance or service provided by AD-TEK PTY LTD is provided without liability.