All that you need to create a modern look is to choose a nice aggregate, perhaps white cement instead of grey cement and to do the "exposing job". Of course today you no longer use so-called retarder pastes, but rather apply modern products like HEBAU's CSE® Deactivators, outperforming the retarder pastes technically and functionally to ensure the desired concrete surface result, even under difficult production conditions.
These "deactivators" are liquid, paint-like materials and contain active ingredients, whose primary task is to prevent the hydration of the top layer of the cement paste in a previously defined "exposure depth", whilst the concrete beyond this "exposure depth" hydrates normally. In this process the CSE® Deactivator only reacts with the cement paste of the fresh/green concrete in this particular depth, which leads to a neutralization. That's the whole trick. The deactivated cement paste on the surface is then removed by "washing" with a high-pressure cleaner. The aggregates in the concrete are now exposed and therefore it is referred to as "exposed aggregate concrete" (from an exposure depth of 2 mm) resp. "micro exposed aggregate concrete" (up to an exposure depth of 2 mm).
The CSE® Deactivators which are required to produce such concrete surfaces can be applied in 2 different methods. When the deactivator is applied to the mould surface before the concrete is casted (similar to the application of a mould release agent), then this is referred to a so-called negative or face-down application, for example widely used in precast concrete applications.
It is also possible to spray the CSE® Deactivator directly onto the fresh concrete, for example after trowelling, as done when using cast-in-place concrete for decorative concrete paving. This is then referred to as the so-called positive or top-surface application.
We supply products with corresponding special functions for both methods of application, e.g. with high mould bonding characteristics, important during negative application to withstand abrasion resistance during the pouring and vibrating of the concrete, or with integrated curing and rain protection functions, good during positive application if castin-place concrete is poured outside.
In order to achieve the desired exposure depth, CSE® Deactivator is available in 4 different versions and each version offers 11 different exposure-depth types.
HEBAU retarder papers are applicable for the production of prefabricated decorative concrete, such as paving slabs/tiles, steps and other pieces of concrete with an exposed aggregate surface. HEBAU retarder papers work well with different production set-ups and concrete mix designs (from zero-slump to wetcast), meaning that they can be used for custom-made decorative concrete or for automated systems, as used for example during the production of terrazzo tiles. The paper has a plastic-coated, waterproof reverse side and the front side is coated with a reliable concrete surface retarder resp. deactivator (used for special RSE®-Papier 01). The reverse side is additionally marked for easy identification of the different exposure depth types.
Very easy and reliable handling. Wide and flexible range of different exposure depth types, sheet sizes and roll-widths.
Standard sheet sizes are:
40x20 cm, 40x40 cm, 40x60 cm, 40x80 cm, 50x25 cm, 50x50 cm, 50x75 cm, 100x100 cm (250 sqm per box)
Standard roll-widths are: 100 cm, 120 cm, 150 cm, 160 cm (minimum length: 100 m per roll)
Tip: for larger concrete elements, or if the mould is more complex, please contact our technical experts. Maybe we know a trick for the production of your particular concrete project, because - don't forget - HEBAU has been selling retarder papers since 1968!
The following types are available (special types on request):
|CSE® Transform||special mould release agent for easy mould-cleaning. Only available in combination with CSE® Deactivator version "pro".|
to clean tools, moulds and sprayers ...
Only available in combination with CSE® Deactivator version "pro".
|RSE® 300||Liquid joint roughening agent for concrete construction joints. For good bonding/adhesion on all types of concrete construction joints.|
|Sprayer||Special low-pressure sprayer with corrosion-resistant components. For MICROGEL® and CSE® spray applications.|