Admixtures

ClevaCrete 842 MVRA logo
This waterproofing concrete admixture is specifically designed for the flooring industry to eliminate problematic moisture egress and works to enable the laying of commercial flooring within 14 days of the concrete pour.

CLEVA-Crete 842-MVRA’s core technology has an organic chemical reaction with the cementitious elements in the concrete matrix and utilises the water of convenience to create a pure C-S-H, which eliminates capillary formation.

This permanently cuts off the route of moisture vapour emission and the reaction is a permanent and integral component of the finished concrete.

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– Waterproofs concrete (9 – 10cm(s) permeability ASTM D 5084)
– No additional moisture controls required
– Increases concrete density and hardness
– Increased abrasion resistance
– Effective in reducing: – Efflorescence – Freeze-thaw – Spalling – Delamination – Spider cracking – Slab curl

CLEVA-Crete 842-WP waterproofing concrete admixture, is designed for the commercial and industrial sectors to diminish moisture/chemical ingress/egress and is suited for specialised concrete in extreme pH environments for example; underground car parks, tunnels, roof tops, wineries, sewerage treatment plants, piling and the aquaculture industry.

Through an inorganic chemical reaction with cementitious elements, CLEVA-Crete 842-WP utilises free water to create a C-S-H gel that eliminates the route of water/chemical ingress/egress and waterproofs and densifies concrete to an industry leading level.

This admixture should be added to concrete whenever superior water proofing, extended service life, chemical resistance and densification are desired.

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– Waterproofs concrete (9 – 10cm(s) permeability ASTM D 5084)
– No additional moisture controls required
– Increases concrete density and hardness
– Increased abrasion resistance
– Effective in reducing: – Efflorescence – Freeze-thaw – Spalling – Delamination – Spider cracking – Slab curl

CLEVA-Crete 842-RP Reo (rebar) Protect, provides the water proofing technology of the 842-WP and has a premium corrosion inhibitor, coating all steel during the plastic stage.

This admixture is for specific applications requiring CLEVA-Crete’s core technology of eliminating the route of moisture/chemical vapour ingress/egress, and goes into concrete designed to deal with extreme geo-technical forces in high-rise construction, infrastructure, mine shafts and wharves etc.

It too is designed for the commercial and industrial sectors in extreme pH environments such as underground car parks, tunnels, roof tops, wineries, sewerage treatment plants, piling and the aquaculture industry.

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– Designed to eliminate oxidation of steel reinforcement both inside the concrete matrix and exposed steel reinforcement in cracked concrete
– Waterproofs concrete (9 – 10cm(s) permeability ASTM D 5084)
– No additional moisture controls required
– Increases concrete density and hardness
– Increased abrasion resistance
– Effective in reducing: – Efflorescence – Freeze-thaw – Spalling – Delamination – Spider cracking – Slab curl

Created from a fine denier monofilament nylon fibre, CLEVA-Crete ny-loc is designed to distribute quickly throughout the concrete mix to enhance its ability to modify the macro and micro cracking properties of concrete and significantly improve long term durability. It measurably reduces plastic settlement, while offering excellent distribution and finishing abilities and extending the service life by enhancing impact and surface abrasion resistance. 

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– Suitable for use in:
– Residential Slab-on-Ground
– Commercial Slab-on-Ground
– Architectural precast products
– Ornamental precast products
– Dry package cement-based products

The 3 most asked questions from all Stakeholders are…

Where did this revolutionary waterproofing technology come from?

CLEVA-Crete technology is as old as the hills.

One hundred years ago, the Engineers for the massive Hoover Dam project, due to it’s size, required a design life of over 1,000 years. No project prior to this had a design life that spanned any more than 50 to 75 years.

This seemingly impossible task was made a reality when the United States Army Corps of Engineers discovered that the 2,700 year old elevated aqua-ducts that were built throughout Europe, held the secret in the materials making up the mortars they used to line these long conduits designed for holding water.

After a number of trials, D 5084 testing was carried out in their own labs, which provided enough evidence to show that it will take almost 1,500 years for any water with a head pressure of over 75 feet (23 metres) to penetrate 4” (100mm) into their new concrete mix design with this old/new technology.

This provides some insight into the origin and modern history of this superior technology that works.

 

In what way does CLEVA-Crete differ from the others?

There are 2 (two) main competitors in this waterproofing space;

Crystal growth technology that initially allows all moisture to enter the concrete matrix via the capillaries. These crystals grow and expand very well. As they do, they slow down the travel speeds of the wicking moisture enough to notice a drying out effect.

Many Engineers have issues with this reactive technology, due to the fact that because it requires ingress of moisture via the capillaries to get the swelling of their crystals, this will lower the pH of the entire matrix, especially around the steel, triggering the deleterious process to the steel itself and the surrounding concrete. This usually results in eventual catastrophic failure.
As the crystals form en masse, the excessive product will leach out in the form of an efflorescence that effects the aesthetics of exterior or overhead buildings or infrastructure elements.

Hydrophobicity Chemicals enrich the concrete matrix with oils, mostly sought from just under the leather of animal skins, this super soft oil is extended with additional hydrocarbons, that when in concrete, flow through to the extremities of the matrix, hydrophobically fighting off any moisture wanting to enter the matrix. This material is extremely effective in keeping all the water out.

Many Engineers have noticed in compression testing that these hydrophobic chemicals will weaken the concrete in some cases by 30+ %, as they slow the hydration water from its normal connection/reaction with the cementitious and supplementary cementitious materials.
Applicators and finishers of this technology complain of an unusual offensive odour.

What makes CLEVA-Crete so smart?

CLEVA-Crete is a concrete admixture designed to work with the free water and various components of the cement during hydration, to build the purest (amorphous) type of C-S-H.

This is an exact science, calculated using the proven ‘Powers’ calculation model that works out how much free water there is in your mix design.

CLEVA-Crete does not rob any hydration water in it’s process, rather it creates a non-hygroscopic, shrinkage and crack reducing concrete. This is mainly due to the fact that the usual osmosis effect on concrete as it is drying, is stopped and the moisture is retained in the slab where it forms nano sized pure C-S-H. This retention of moisture is the key to it’s lowering typical shrinkage.

Many white papers have been written that support this anomaly, proving that this nano sized C-S-H adds low permeability and strength to concrete, while adding ductility and thus resultant durability to the life of concrete structures.

Today’s builders are cleaning up as this technology reduces moisture egress so effectively that they are able to schedule the early installation of today’s VOC free moisture sensitive water based coatings, adhesives, and resilient vinyl flooring products.

Why would you use anything else than CLEVA-Crete!

Why Choose Us

Tried and tested

CLEVA-Crete™ technology has been used worldwide for over 30years. Made in Australia, it surpasses AS 1379 requirements.

25-Year Warranty

Covering labour and materials for any moisture related failure or bond-loss.
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100% Failure Free

CLEVA-Crete™ provides peace of mind and instills project pride with each pour, giving confidence to builders and end users.

Technology That Works | Call 1300 503 929