WC141 MarApr 2025 - Magazine - Page 24
STORMWATER
PERMEABLE INTERLOCKING CONCRETE PAVERS (PICPS) are
modular paving units specifically designed to support sustainable
stormwater management. Their joints are filled with permeable
materials like gravel or specially engineered aggregates, enabling
water to infiltrate through the surface and recharge the underlying soil
or a base reservoir. This reduces surface runoff, minimizes the risk of
flooding, and mitigates strain on municipal stormwater systems.
PICPs are not only functional but also aesthetically versatile, as
they come in various colors, shapes, and patterns to complement
diverse architectural and landscaping styles.
Applications:
PICPs are widely used in pedestrian walkways, plazas, and parking
lots, combining stormwater management with urban beautification.
Calgary’s porous pavers
The City of Calgary adopted PICP systems as part of the Marda
Loop Main Streets project, which aims to revitalize the district by
improving pedestrian access, mobility, and community spaces.
As part of this initiative, permeable interlocking concrete pavers
were installed along 18 Street between 34 and 36 Avenues. The
permeable surface helps manage stormwater by allowing it to
infiltrate through the pavement, reducing runoff and mitigating flood
risks. The project will showcase the durability and aesthetic value of
PICPs in urban redevelopment.
Why it’s a good option for Canadian climates:
The City of Calgary adopted PICP systems as part
of the Marda Loop Main Streets project.
PICPs are well-suited to the freeze-thaw conditions of Canadian
winters. Their modular design facilitates easy repairs and ensures
resilience to freeze-thaw stresses, making them a sustainable choice
for municipalities.
POROUS RUBBER PAVEMENTS are a flexible, durable option for managing stormwater made from recycled rubber. Their permeability allows
water to infiltrate while offering a resilient surface resistant to cracking, making them ideal for high-traffic and environmentally sensitive areas.
Applications:
Used in playgrounds, trails, and areas requiring softer, shock-absorbing surfaces, porous rubber pavements are gaining traction in urban
stormwater management.
From tires to trails
Pilot projects in Ottawa have tested porous rubber pavements for their resilience in cold climates and their ability to filter pollutants such as
oils and metals from stormwater runoff. These pavements are made from recycled post-consumer tires, providing an eco-friendly alternative
for stormwater management. They offer effective groundwater recharge and pollutant filtration, while their flexible surface resists cracking
during freeze-thaw cycles. The use of a proprietary water-repellent binder enhances their resilience and ensures long-term performance.
Why it’s a good option for Canadian climates:
Porous rubber pavements offer resistance to cracking in extreme temperatures but require regular maintenance to prevent clogging from
debris. These systems are particularly well-suited for areas subject to seasonal freeze-thaw conditions.
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WATER C AN ADA • M ARCH/APRIL 2025
WAT E R C A N A D A . N E T
