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In addition, permeable pavements serve as both a paved surface and a stormwater management system, so they can reduce the need for conventional stormwater management practices such as piping, retention ponds and swales, resulting in overall cost savings.

Porous Pavement & Permeable Pavers

The LID design included the installation of two porous asphalt parking lots covering a total of 4. Interested in more on permeable pavements, like porous asphalt and pervious concrete? The National Ready Mix Concrete Association , the National Asphalt Pavement Association , and the Interlocking Concrete Pavement Institute have information on certified craftsmen, installers and technicians in your area as well as information on how to become certified in these green infrastructure techniques.

She currently works in the Water Protection Division focusing on stormwater management through the use of Green Infrastructure. Jeanna loves nothing more than spending time outdoors with family and friends hiking, kayaking or spending a day at the beach.

Porous Pavement & Permeable Pavers | Lake County, IL

Considerations for design, construction and maintenance are also discussed. University of New Hampshire Stormwater Center Exit Find a range of information about permeable pavements, including design specifications, water quality benefits, and performance in cold climates.

Pervious Pavement, Vermont Department of Environmental Conservation Exit Illustrations and photos along with some basic information about different materials. Contact Us to ask a question, provide feedback, or report a problem. Jump to main content. The paving units vary in thickness. A 2-in. Paver thickness can be increased up to 4 in. Figure 6.

Typical grid paving unit cross-section. Figure 7. Typical cross-section for a pervious paver system.


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  • Soak Up the Rain: Permeable Pavement?

When bound together into the overlay matrix, they form a permeable surface with open voids. Rubber overlay pavements have flow-through rates of as high as in. If properly mixed, the binder enables the rubber to resist degradation from transmission fluid, brake fluid, hydraulic fluid, salt water, oil, chlorine, ozone, bromine, muriatic acid, and other reactive materials.

Rubber overlay pavements also demonstrate elastic properties that help them resist cracking ASCE The pavement material is typically poured in place by hand using specialized labor and equipment. While the pavers themselves are not per- meable, they can be placed with open joints between them and backfilled with small aggregate to create a permeable surface. The pavers are roughly one-third the weight of standard concrete pavers and are available in a variety of shapes and sizes.

However, there are also risks associated with their use.

An additional potential benefit in the airport environment is the possibility of reducing wildlife attractants. At some airports, wildlife such as birds nest in open drainage ponds and create the risk of bird strikes. Eliminating the open water source and providing subsurface water storage can reduce the number of birds and other wildlife on the airport. The removal of open water sources in public areas also reduces safety risks such as accidental drowning. Permeable pavements also generally require no or at least less deicing FHWA Water does not stay on the surface, so icing does not generally occur.

Therefore, less deicer product is introduced into the environment. While the environmental benefits of permeable pavements are many, there are also risks. The primary environmental risk for permeable pavement is accidental chemical spills, such as spills of hydraulic or engine oils. An impervious pavement surface allows a window of opportunity to collect chemicals if there is a spill.

However, once a fluid is spilled on permeable pavement,.

Permeable Pavement: The Pros and Cons You Need to Know

For a full-infiltration system, this provides a nearly direct access to the subgrade. Mitigation of a chemical spill once it reaches the subgrade can be costly. If the permeable pavement is a lined system, chemical spills may not be as significant an issue.


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While the chemical does enter the permeable pavement structure, it will be transported to the outflow, and the outflow can be designed with a separator, filter, or other collection system to contain potential spills. Lined permeable pavement systems could actually be a benefit for chemical collection: lined systems could potentially be used for aircraft deicer collection.

Aircraft deicing chemicals need to be collected and, therefore, are problematic for the use of unlined permeable pavement systems. These pavements reduce the risk of surface ponding and, therefore, the risk of hydroplaning, making travel safer during rain events FHWA As mentioned previously, permeable pavements do not generally ice over because the water does not remain on the surface.

Information About Permeable Pavement

Therefore, there is a lower risk of skidding on ice. There are typically fewer snow removal and deicing operations overall than for impervious surfaces FHWA However, snow removal procedures can be different from those for other pavements, and this requires changes in operational procedures e.

Some operations may require restrictions with permeable pavements. Fueling would not be allowed near the permeable pavement, and the location for maintenance activities may need to be restricted, such as by requiring maintenance to be performed in maintenance buildings or hangars. These limitations could be made part of the leasing agreement if the activities are tenant related.

The users of the pavement need to be aware of what the pavement is and how their actions can influence performance of the permeable system. Maintenance and repair operations will also be different from those for conventional pave- ment areas. Chapter 7 provides more in-depth discussion of maintenance and repair activities. To maintain permeability, periodic vacuuming of the surface will be required, which may not be common maintenance work at some airports.

This will require appropriate maintenance equipment that an airport may not currently own. Pavement repairs will also be different from those for conventional pavements. Patching methods and surface treatments applied elsewhere should not be applied to permeable pavements.

Introduction to Permeable Pavements

With unfamiliar materials and techniques, contractors are likely to increase their unit costs to cover contingencies. Suppli- ers are also likely to charge more for the materials because they are not typically common products and require manufacturing changes to produce a comparatively small quantity of material.

A thick reservoir will require greater excavation because of the pavement depth.