Last edited 28 Jun 2017

Permeable pavements

Contents

[edit] Introduction

A pavement with base and sub-base that allows the water to infiltrate or pass through the surface is known as Permeable Pavement. It not only helps to reduce the surface run off but also effectively traps the pollutants and solid particles in the water avoiding ground water pollution.

Permeable paver demonstration.jpg

Evaporation of water at or below the surface also produces surface cooling, as opposed to the traditional heating of paved areas. This is especially beneficial in cities which experience extremely high temperatures in summer – traditional “blacktop” temperatures can make some public spaces unusable in warmer weather.

Generally, permeable pavement structures consists of a pervious / permeable surface course which may be of Asphalt concrete or Portland cement concrete laid over a layer of fine aggregates, which acts as a filter layer for infiltrating storm or rain water. Underneath this filter layer is a uniformly-graded gravel course to store water, which ultimately penetrates into the ground. General design practice requires an un-compacted natural ground, which allows relatively easier discharge of water avoids any standing water under the pavement structure that may cause structural failure.

Permeable Pavement vs Conventional Pavement.jpg

Permeable pavements are generally recommended for residential, commercial and urban areas but not highways, motorways and streets with heavy traffic loading as these pavements are not designed with structural capacities to support such loads.

[edit] Advantages

Permeable pavements offer many benefits, both aesthetic and practical. Some of the benefits are listed below:

[edit] Disadvantages

Some of the disadvantages associated with these pavements are:

[edit] Find out more

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