gtResibond

The gtResibond is an aesthetically pleasing porous resin bound surface layer of aggregate, suitable for the surrounds of trees within hard-landscaped areas. gtResibond can be used in areas where conventional means of mulching with loose materials may not be practical due to the constant displacement of the material increasing maintenance time and costs.

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Description

gtResibond is a high performance, two component UV stable resin system for use in tree put surfacing as a binder for natural aggregate.
This polyurethane resin system binds the natural dried aggregate, giving resilience and toughness with a degree of flexibility. The cured material exhibits good strength and is non-yellowing. The mixed system is easy to apply.

Specification

Pack coverage: 1m2 of surfacing (45mm depth)
Ambient temperature: 5°C and 35°C during application and cure
Cure: 20°C 3.0 – 4.0 hours
Mix Life: 20°C 20 minutes
Appearance: Pale straw coloured liquid
Viscosity: 25°C 0.7–1.2 Pas (7–12 P)
Storage Life: 20°C 2 years

Installation Guide

Surface Preparation
Ambient temperature should be between 5 degree celcius and 35 degree celcius during application and cure.
Dry weather conditions and a dry substrate are essential.
For low temperature applications refer manufacturer.
Above the tree root ball a solid base should be created to accept the Tree Pit Surfacing. Tree soil should be placed around the root ball and well compacted. Above this, and separated by a geotextile membrane, a solid base of compactable free draining material should be provided. To help spread any superimposed loading this should be at least 150mm of 4/40mm crushed stone or Type 3 fill (Clause 805, specification of highway works). A reduced thickness of a finer grading would be acceptable if there is no superimposed loading.

Mixing and Application
Resin Binder
Resibond is supplied in pre weighed packs. Stir Pack B well until a consistent colour and pour into a container. Add Pack A and mix together until homogeneous (about 2 mins).

Binder & Aggregate
Place the dry aggregate into a mixer. Commence mixing and pour in the mixed resins. Mix for a minimum of 1 minute ensuring the aggregate is evenly coated.
If it has been necessary to dry the aggregate using heat it must be allowed to cool down (hot aggregate
will accelerate binder cursing).

Depending on the slope of the substrate, the use of the surface and the type of stone it may be necessary to apply a surface scatter of high friction grit to improve the fricitonal characteristics of the surface.

Application
The application area must be contained in order to support the wet resin mix before it cures. Typically there will be a kerb around the tree pit and a collar around the tree itself (sufficient to allow for growth). Apply the resin and aggregate mix immediately to prepared area. Either tamp down or finish with a trowel. Depending on the slope of the substrate, the use of the surface and the type of stone it may be
necessary to apply a surface scatter of high friction grit to improve the fricitonal characteristics of the surface.