Why Resin Bound...?

Why choose resin bound?

Some of them you can probably guess – maintenance, lifespan, appearance and weather resistance but here is our full list of benefits of going for choosing a Resin Bound driveway.

  • It’s permeable: Ronacrete resin bound paving is cold mixed on site using a process that ensures every particle of stone is completely covered in resin; forming a structurally stable 3D matrix. During the laying process, minute voids are created that allows water to drain through. This enables rain water to permeate through the surface allowing groundwater to level, which helps regulate the effects of ‘heave’ and ‘shrinkage’. This reduces standing water, surface water run-off and flash flooding.
  • It’s aesthetically pleasing: Not only is Ronacrete resin bound paving decorative, it’s sustainable, practical and versatile. Ronacrete resin bound paving is available in such a variety of colour and textures and is suitable for any type of project; new build or refurbishment and all styles of property; modern, traditional, listed or heritage.Other paving options have less design flexibility and can leave an industrial looking finish.
  • It’s resistant to weather conditions: Ronacrete resin bound paving doesn’t soften in the summer, freeze in winter or fade in sunlight. Alternatives, such as asphalt, tend to soften in the heat which can result in marks in the surface, freeze in cold weather and experience colour deterioration due to UV exposure.
  • It’s long lasting: Ronacrete resin bound paving is a strong, durable surface with a 15 year guarantee, a premier product, installed correctly and properly maintained, can last for up to 25 years. Whilst concrete matches resin bound paving with its longevity, it fails to provide the same choice of colours and design flexibility.
  • It requires minimal maintenance: With Ronacrete resin bound paving there are no weeds to weed or lose stones to sweep. Providing any established weed growth was removed before SureSet is laid, it is unlikely, with regular cleaning, that any new weeds will grow. Regular cleaning also reduces any moss or algal growth.
  • It is environmentally friendly: As surface or rain water seeps through permeable paving and the underlying bases they act as a natural filter by reducing or removing impurities and pollutants caused by oils and metals. When rain water runs off an impermeable surface it picks up pollutants as it flows into drains and natural water courses (rivers, lakes and oceans) which creates biodiversity as well as health issues.Heat islands are found mainly in cities, warmer than other more rural areas because the energy and pollution created by the densely populated situation are absorbed and stored by hard surfaces, like asphalt and concrete. This also has a negative effect on the air and water quality.
  • It’s SuDS compliant (Sustainable urban Drainage Systems): a water management system introduced by the Environment Agency to help manage flood risk and water quality.
  • No planning permission required: Since 2008 government legislation, planning permission is not required for areas less than 5m² or if the new surface is permeable.If you have any questions, we would always advise you to speak to your local planning department.

A resin bound surface is a problem solving paving system, with a wealth of experience in the industry we can help you with all your porous paving and retrofit paving needs. We love working with our clients to select colours, helping with costings and specification so please contact us to discuss your specific requirements any time.

resin bound driveway benefits

Types of Resin
chemical-compositionThere are two types of polyurethane resin used for resin bound surfacing, one is UV stable (aliphatic polyurethane) which remain unchanged by exposure to ultra-violet light and the other, (aromatic polyurethane) will yellow and darken after exposure to UV light, thus altering the appearance of the aggregate.

Aliphatic Resins
All Ronacrete products for resin bound surfacing or tree pit applications are UV stable. When retention of the original colour is required, UV stable resins should be chosen. A typical argument put forward by suppliers who do not offer UV stable resins is that many of the aggregates available are yellow and/ or brown. This assertion ignores the large number of sites where some areas are exposed and some are in permanent shade, under evergreen foliage or covered by movable objects, such as plant pots. In such circumstances, shade variation is inevitable and will become apparent relatively quickly.

There are some MDI based polyurethane binders sold as being UV resistant; evidence from independent researchers suggests that although UV “blockers” may delay the effects of UV light, blockers only delay degradation. We would suggest that designers should ask suppliers claiming UV resistance for independent evidence of long term protection from UV degradation.

Aromatic Resins
Aromatic polyurethane products are excellent for numerous uses. They are widely used for flooring, where their resistance to wear, chemical spillages and relatively high service temperatures make them an obvious choice for many industrial applications. Their lack of resistance to ultraviolet light makes aromatic polyurethanes less suitable for exterior use. Exceptions for this as undercoats protected from UV exposure. UV degradation is not limited to yellowing and darkening. Surfaces become duller and other properties such as elasticity and flexibility are also adversely affected by exposure to UV.

There is some evidence to support the suggestion that aromatic polyurethane coatings become embrittled and cracked after UV exposure; the following is copied from an academic paper; “It can be seen that after 1080 h of exposure, the binder is degraded and free particle clusters were found on the surface. Exposing the films to the UV light results in formation of deep cracks and holes and a non-uniform degradation in the nonstabilized films…..”

Binders for resin bound surfacing should be sufficiently elastic to withstand minor substrate movement and traffic loads; there is evidence of an increased risk of cracking of surfacings bound with resins which have low elasticity; especially when surfacings are applied to asphaltic bases, which are subject to flowing of bitumen binders at higher temperatures. When choosing a resin bound surfacing material, a specifier should weigh the superior properties of aliphatic resins when exposed to UV radiation against the reduced initial cost of aromatic polyurethanes and consider which offers better value for money to their client.

Resin Bound Aggregates
Natural aggregates are most commonly used but coloured glass and colour coated aggregate are also available. The designer should be aware that glass crushes more easily than most natural aggregates. In particular, glass has been known to suffer damage under high heeled shoe traffic. Quartz aggregate with UV stable colour coating can be sourced. However, coating loss can occur under regular medium to heavy foot traffic. The designer should consider restricting the use of coloured glass and colour coated aggregates to areas with little traffic.

Resin bound surfacing is suitable for foot traffic and light vehicle traffic up to 7.5 tonnes. Resin bound surfacing is not recommended for applications where heavy traffic or traffic by heavier vehicles is expected. Applications include car parks (excluding shopper’s car parks), driveways, podium decks and terraces, public squares, courtyards, footpaths and pool surrounds.

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