Permeable Pavements

Permeable pavements is a system that allows stormwater to infiltrate the pavement surface further into underground. It uses various type of sustainable materials and paving formation to allow the water to infiltrate through the paving gap or being absorbed by the material surface. The application is ranged from roads to car park, cycle lane, public space and so on. This system is able to reduce the stormwater runoff to reduce the risk of erosion. Yet, its major environmental benefit is its capacity to trap the pollutants in its layers, thus it will improve the nearby water quality.

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Illustration for porous asphalt system ©Cahill Associates, Inc.

There are nine type of permeable pavement installations which the application should be adjusted to the purpose, soil, traffic speed, and load. Permeable interlocking concrete pavement is usually chosen for a low-speed traffic areas, such as car park. While, porous turf is normally chosen for non-trafficked areas or those areas subject to occasional trafficking. The porous asphalts can be used on urban highways 1. Plastic grid system is normally combined with turf or gravel and act as the container or stabilizer. It allows a major amount of water to be absorbed underground. Resin bound paving often used on pedestrian pathway or tree pit since it able to give room for the root to grow. Bound recycled glass pavement comes from a eco-friendly agenda as it combines granite, resins and binding agents with disposed glass waste to prevent it to be disposed in landfill. It is normally used for pedestrian or low-speed traffic.

 

 

Reference:

1. http://www.pavingexpert.com/permabl1.html

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