Hydrapave™ - Boral

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Hydrapave – Permeable Paving SystemThe SystemRather than collecting water run-off, channelling it through open drains and subsequently treating it, water engineers in many parts of the world are solving the problemat the source. This is a cost competitive and environmentally productive approach.The patented Hydrapave system allows rain water to infiltrate through small channels formed on the ends and sides of the concrete pavers, passing into a preparedsub-base. The water is then detained, filter treated and dispersed, discharged or directed for re-use.Geotextile and impermeable membranebrought up to kerb and cut off flush withsurface of Hydrapave pavers.The Hydrapave paving system isengineered for pedestrian and lightlytrafficked areas such as malls, car parkareas and driveways.Standard kerbingHeader courseLight dressing of 3mm dia.clean crushed aggregate duringcompactionBedding courseof 5mm dia. cleancrushed aggregateGeotextileSub-base of crushed aggregatePVC outlet pipeImpermeable membrane orgeotextile to suit conditionsCollection drain wrapped in geotextileTypical Infiltration SystemTypical Tanked SystemHydrapave PaversHydrapave Pavers5mm Aggregate5mm AggregateFilter Fabric to suit(optional)5-20mm AggregateSub-base20-75mm AggregateSub-baseFilter Fabric to suit(optional)Filter Fabric to suit(optional)5-20mm AggregateSub-base20-75mm AggregateSub-baseImpermeableMembrane to suitSub-gradeAdditional OptionsSub-gradeCollection drainwrapped in FilterFabric (optional)PVC outlet pipe12 3Filter Fabric(Optional)Filter Fabric(Optional)ImpermeablemembraneImpermeablemembraneGeogrid reinforcement(for site typically exceeding1:20 slope)2Typical and re-useInfiltration and overflowTanked with additional treatment
Hydrapave – Permeable Paving SystemThe System Components119 (incl. nibs) 234 (incl. nibs)64 40 764 40 76 40 6801 Hydrapave Concrete paver with a unique edge chamfer and bevel which permits butt joining. Joints should bedressed with 3mm dia. uniform clean. Clean aggregate should be applied during compaction. Sandmust not be used as it slows water ingrets.2 Bedding Course50mm compacted thickness of 5mm single size crushed aggregate. Sand should not be used.3 Filter Fabric (Optional)Permeable geotextile, standard or heavy grade depending on pavement design, used to controlmigration of hydrocarbons and flues into drainage layer.4 Sub-baseTypically 350mm thickness of single size 40mm crushed aggregate, gap graded,and yielding 30-40% voids. Thickness may be varied depending on pavement design.5 Perimeter MembraneEither impermeable plastic membrane for tanked systems, or permeable Geotextile forinfiltration systems.35142On-site Water TreatmentThe Hydrapave system provides effective on-site water treatment in the following ways:• Organic matter and loam are caught on the geotextile and held in the layer of5mm aggregate.• Oils and heavy metals coat the surface of the organic matter and loam.• Natural microbial filament growth in the sub-base digests low levelhydrocarbon pollution.• Severe hydrocarbon contamination can be treated by seeding with specialist microbes and slowrelease fertilisers.Long Service Life & Low Maintenance• Regular sweeping of the Hydrapave surface is recommended to remove leaves and debris whichmay inhibit the water absorption capacity.• Occasional light power cleaning may be used to remove unsightly surface contaminants.• Under normal conditions and appropriate light maintenance cycles as detailed above, a workinglife of 10 or more years can be expected. After this time, the pavers can be lifted and cleaned, thebedding materials and filter fabrics replaced, and the pavers re-laid to continue providing excellentservice into the future.3
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Hydrapave™ - Boral

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