Based on 45-year proven crystalline technology, CWS Admix improves on the basic concept and constitutes next generation integral waterproofing. A state-of-the-art crystalline admixture, with excellent performance on below grade projects, CWS Admix does equally well for water tanks and all systems of water collection and treatment, especially drinking water, since it carries several potability certifications, among which ANSI/NSF/61-CAN.

Not only it offers excellent watertightness for the interior of structures, but also intense anti-corrosion protection for the steel rebar, as it blocks the passage of water-soluble chlorides and other contaminants – responsible for corrosion initiation.

 CWS Admix Dosing

We add CWS Admix in the concrete mix, either at the batch plant – on the pre-mixer of the aggregates – which generally ensures even distribution prior to the addition of water, or very conveniently on-site, by adding it in the mixing truck prior to pouring, in cases when the heavy traffic of cities – such as Pretoria, Johannesburg or Cape Town – which can delay concrete truck to the site, causing concern about concrete hardening in the truck.

If you add it to the mixing truck, it is advisable to continue mixing for at least 10 minutes at high revolutions, prior to pouring.

Integral waterproofing

We often call Crystalline Admixture technology  “integral” , as the admixture is dispersed evenly throughout the concrete mass, creating crystals in the porosity and capillaries of the concrete – as a result of its  hydrophilic properties – that block water from penetrating.

This method of achieving concrete watertightness is the most trustworthy solution, for successful below-grade waterproofing today.

Benefits of CWS Admix

Has testing to prove it resists hydrostatic pressure to 14 bars of pressure or 140m of waterhead, which is equivalent to a 40 storey building.  This is especially beneficial in places like Gauteng & surrounding Highveld areas, that often have high water tables.

Speeds up construction time significantly, as we add it to the concrete during production, so it saves all the delays from waiting for the concrete to cure and remove the formwork and then proceed to install membranes.

Requires no manual labor, to waterproof the structure.

Seals current and future static cracks in the concrete, rather than just lining the sides of the capillaries of the matrix as pore blockers typically do.

Needs no reapplication, no replacement and no periodic inspection or maintenance.

Unlike membranes – nobody can puncture, de-bond or tear an integral admixture. It is just as impossible as trying to take sugar out of a birthday cake. Nor can it be damaged by trades during application or during backfilling.

Other benefits

Membranes typically get damaged during backfilling, and we  only discover the damage after the backfilling has concluded and water starts appearing inside the structure. But then it is too late for remedy. Oftentimes, such buildings  resolve to using underground pumps throughout their lifetime. This cannot happen when crystalline technology has been properly used.

Accepts hydrostatic pressure on both positive and negative side.

Maximizes the building footprint – which leads to more usable surface for developers – because it allows construction right to the edge of the site, without the need to leave space for applicators to descend and apply membranes. Not only this means smaller excavation and faster backfilling, but also better return on investment for the owner.

CWS Admix, easily waterproofs the most complex concrete surface shapes  In such cases, traditional membranes fail, because of the number of cuts and patches needed to cover protrusions, sharp corners and unusual shapes, resulting in leaks from poor workmanship.

CWS Admix is one of the most friendly crystalline admixtures in the market. It contains no carcenogenic materials or volatile organic compounds (VOCs) and carries several approvals for drinking water safe use, among which NSF/ANSI/CAN-61, the world standard for drinking water safety.