SUDS Water Storage Options
This system has the following benefits:
Water storage
The high void capacity of Charcon Permavoid™ (92 per cent),
typically a 4:1 ratio when compared with alternative granular
systems, results is a reduced area for equal system thickness and
usually allows for water storage to be confined within the sub-base
layer. This approach often results in a lower overall cost.
Minimum depth
Each Charcon Permavoid™ unit is only 150 mm deep – at least
one-third the depth of competing granular storage systems. This
means a shallower construction, minimising excavation and waste,
particularly important on brownfield sites with contaminated ground
and in view of the escalating costs of waste disposal.
Complementary products
Aggregate Industries’ SuDS solutions offer the following
complementary and unique products in addition to the Charcon
Permavoid™ system, with the option of a retrofit for existing
non-SuDS schemes:
- Charcon Permakerb™ and Charcon Permachannel™ convey rainwater
into the Charcon Permavoid™ system through surface drainage
systems, which integrate with conventional hard surfaces
- Charcon Permaceptor™ is an integral petrol/oil interception
facility which eliminates the need for separate, expensive
conventional interceptor systems.
- Technical > Installation – ensure this information is
changed for each category as per amends above
With any SUDS system, the key element is the provision to store
water prior to its controlled discharge. Aggregate Industries SUDS
range offers a choice of water storage options with benefits
relevant to specific ground and site conditions. There are two
options; either a granular system, or a modular plastic sub-base
replacement system.
SUDS option one: Granular system
This system has the following benefits:
Water storage
The high void capacity of Charcon Permavoid™ (92 per cent),
typically a 4:1 ratio when compared with alternative granular
systems, results is a reduced area for equal system thickness and
usually allows for water storage to be confined within the sub-base
layer. This approach often results in a lower overall cost.
Minimum depth
Each Charcon Permavoid™ unit is only 150 mm deep – at least
one-third the depth of competing granular storage systems. This
means a shallower construction, minimising excavation and waste,
particularly important on brownfield sites with contaminated ground
and in view of the escalating costs of waste disposal.
Complementary products
Aggregate Industries’ SuDS solutions offer the following
complementary and unique products in addition to the Charcon
Permavoid™ system, with the option of a retrofit for existing
non-SuDS schemes:
- Charcon Permakerb™ and Charcon Permachannel™ convey rainwater
into the Charcon Permavoid™ system through surface drainage
systems, which integrate with conventional hard surfaces
- Charcon Permaceptor™ is an integral petrol/oil interception
facility which eliminates the need for separate, expensive
conventional interceptor systems.
- Technical > Installation – ensure this information is
changed for each category as per amends above
The incorporation of an open graded aggregate sub-base is the
traditional method used as a water storage solution and can be
adopted for both attenuation and an infiltration system; water is
stored in the voids between the aggregate particles.
The experience and technical expertise gained
through many years of use of this system provide a strong proof of
performance pedigree for clients opting to use this method.
SUDS option two: Sub-base Replacement
Charcon Permavoid™ is a unique high strength modular plastic
sub-base replacement system; its highly-voided structure (92%)
ensures maximum water storage in a small area. Designed for
use as a combined drainage component and sub-base it has an
exceptionally high compressive strength and bending resistance
within joints that makes it ideal for the shallow attenuation and
conveyance of surface water.
When using Charcon Permavoid™ the overlying pavement layers can
be as slender as 130mm and the overall pavement as slender as
280mm, depending on the nature of traffic loading and underlying
soil CBR values; Manufactured from recycled plastic, each unit is
less than 3kg and easily handled on site.
Charcon Permavoid™ has been independently validated through
exhaustive laboratory investigations, field trials and computer
modelling to evaluate hydraulic flow, structural integrity and
water quality performance. It is suitable for all applications
where a traditional aggregate sub-base can be used. With
specialist Geo-membranes and Geotextiles provided from the Charcon
range, the system will provide either an attenuation or
infiltration drainage solution.