WHAT IS A RESIN BOUND GRAVEL?
Resin-bound gravel or paving is a mixture of aggregate stones and resin used to pave
– Pool deck
– Tree pits
It is a flexible surfacing material (following the movement of concrete slab, especialy when it comes to temperature variation), so is resistant to cracking.
How is the resin bound gravel is applied ?
The system is mixed on site and cold applied, using a high-quality clear resin binder to coat the aggregate particles (3mm to 9mm washed and dried marble or quartz) prior to laying. Unlike resin-bonded surfacing, where a thin layer of resin is applied to the surface and then the aggregate scattered on top (which can then become loose over time and is impermeable), resin and aggregates are thoroughly mixed together prior to laying, ensuring that the aggregate is completely coated and so providing a totally bound surface.
RESIN BOUND GRAVEL : A PERMEABLE SOLUTION
Resin-bound paving is a fully permeable paving solution which allows water to freely drain through the surface. Meeting the requirements of Sustainable urban drainage systems (SUDS) standards, this helps to prevent standing water and largely eliminates surface water runoff.
Resin-bound surfacing does not currently conform to any British standards apart from BS 8204-6:2008+A1:2010 Appendix B for slip resistance. Therefore, great care must be taken to research any company that is offering resin and aggregate services.
The quality of the resin-bound surfacing is dependent on a variety of factors.
The polyurethane resin should be sourced from a manufacturer who can demonstrate that they have BS EN 9001 quality management standards. All companies conforming to this will be able to provide documentation on request. The resin-bound aggregate mix will generally be a mix of natural aggregates that must be kiln dried to prevent moisture coming in contact with polyurethanes and causing discolouration and poor performance.
The resin sourced should be a two-part, quality-controlled polyurethane or similar with the activator added during the manufacturing process to eradicate mistakes on site made by operatives who are not qualified chemists. Too much activator or too little can affect the performance of the product.
RESIN BOUND GRAVEL : AN EFFICIENT ANTI-SLIPPERY FLOORING SOLUTION
Although resin-bound paving is a slip-resistant permeable decorative paving system, it has the ability to last for many years if sourced and installed correctly.
Natural aggregate mix blends tested to BS 8204-6:2008+A1:2010 Appendix B for slip resistance will, when installed correctly, provide a slip-resistant, permeable, decorative finish suitable for pedestrian and light vehicular traffic.
Decorative coloured recycled glass and pigmented quartzes are suitable generally for visual purposes only, as they are susceptible to damage due to having low crush values, so will become damaged if walked on.
Natural aggregate and recycled rubber blends are available from BS EN 14001 manufacturers and are suitable for pathways and nature walks where environmental benefits are required from the specifier. The resins available are predominantly polyurethanes.
The usage of higher-quality polyurethane resins ensures greater flexural performance for external applications and the resin will not yellow in appearance when exposed to UV light, the presence also provides greater protection from UV degradation. Non light-stable polyurethanes, although strong in performance, are more suited to internal applications where they are not in direct sunlight. Internal resin-bound applications are generally known as stone carpet.
RESIN BOUND PAVING : A COST-EFFICIENT MAINTENANCE SOLUTION
As a result, a resin-bound surface is more durable and requires less maintenance – it needs to be swept or power washed at least twice a year, to avoid the buildup of detritus and prevent the growth of moss or algae (depending on the geographic area). A simple water jet on a regular basis is enough to clean and maintain de the surface.
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Discover or Resin Boudn GRavel for Swimming Pools .