Pap also known nationally as porous asphalt pavement, and. Hydrology, design, installation, maintenance and cost below we highlight several websites, publications and presentations that include design, maintenance and cost. Permeable interlocking concrete pavements ix introduction compared to north america, germany consumes about 12 times more per capita of interlocking concrete pavement annually. Portland cement pervious concrete pcpc is very popular and continuously gaining a lot of attention in construction industry. While pervious pavements have become very popular in the area of stormwater. Pervious concrete pavement maintenance and operations guide 5 winter maintenance this is a critical aspect of owning a pervious concrete pavement. Generally for a given set of materials, strength and infiltration rate of pervious concrete are a function of the concrete density. Key word pervious concrete, strength, pavements 18. In this study, the necessary initial steps are taken towards this goal. In contrast normal pavement is an impervious surface that sheds rainfall and associated surface pollutants forcing the water to run off paved surfaces directly. Pervious pavement is designed to allow percolation or infiltration of stormwater through the surface into the soil below where the water is naturally filtered and pollutants are removed. Pervious concrete pavement maintenance and operations guide.
This pervious surface replaces traditional pavement, allowing stormwater to infiltrate. Permeable interlocking concrete pavements picp unlike other systems, the paving stones that comprise the wearing surface of the pavement are not permeable. Pervious concrete can be used in a wide range of applications, although its primary use is in pavements which are in. The source of all materials proposed for use in constructing pervious concrete sidewalks. Stormwater management with pervious concrete pavement. Pervious concrete pavement is a permeable pavement, often with an underlying stone reservoir, that captures rainfall and stores runoff before it infiltrates into the subsoil.
Pervious concrete as a paving material has seen renewed interest due to its ability to allow water to flow through itself to recharge groundwater and minimize stormwater runoff. At least 15% of this is permeable interlocking concrete pavement. Usepa, postconstruction stormwater management in new development and redevelopment. Pervious concrete also called porous concrete, permeable concrete and no fine concrete is a special type of concrete with a high porosity used for concrete flat work applications that allows. To keep the system clean throughout the year and prolong its lifespan, the pavement surface should be. Pervious pavements installation, operations and strength part 1. Pervious concrete can be used for a number of applications, but its primary use is in road pavement such as in rural areas. This guidance considers pervious concrete pavement pcp, pervious asphalt pavement. Preliminary procedure for structural design of pervious concrete pavements.
Pervious concrete can be a bmp used to mitigate problems associated with surface runoff through several mechanisms. The joints are filled with permeable aggregates that allow water to freely enter the surface. If the proper vacuuming or flushing is not carried out, pervious concrete will assume the traits of impervious concrete. Siting should be a major factor when considering permeable pavements.
Study on compressive strength and permeability of pervious. Pervious concrete pavements are gaining popularity for stormwater management. Quality evaluation tests for pervious concrete pavements. Permeable pavements are alternative paving surfaces that allow stormwater runo. These systems manage stormwater by increasing the rate and volume of stormwater. When rainwater falls on conventional pavement, such as concrete, it accumulates and then. For pervious concrete in soils with high infiltration rates, its possible that you wont need any rock because the material is such that the rigid pervious concrete will be structurally sound on the native soils. Curing ensures sufficient hydration of the cement paste to provide the necessary strength in the pavement section to prevent raveling. Pervious concrete pavements enviromental concrete the. Download pervious concrete spec pdf since we pioneered efforts to create and publish a pervious concrete specification on the internet in the 1990s, the use of pervious concrete pavement, also known as no fines concrete zero slump concrete and porous concrete pavement has continued to gain acceptance.
Pervious pavement systems offer designers and planners an effective tool for managing stormwater. The drainage rate of pervious concrete pavement will vary with aggregate size and density of the mixture, but will generally fall into the range of 2 to 18 gal. Permeable pavement fact sheet information for howard county, maryland homeowners purpose of this fact sheet. Local agencies are interested in pervious pavements ability to reduce storm water runoff by. Pervious concrete pavement maintenance and operations.
Preliminary procedure for structural design of pervious. Also considered as green pavement, it allows water to run through it rather than accumulate on it or run off of it. Pervious concrete specification charger enterprises, inc. The test panels should be placed on a subgrade and subbase prepared as specified, using the material and construction methods that will be used. Pervious concrete pavement is a portland cementbased, rigid permeable pavement that serves not only as the surface layer of a stormwater management. The theoretical storage capacity of the pervious concrete is its effective porosity.
When used in pavement applications, pervious concrete can effectively capture and store stormwater runoff, thereby allowing the runoff to percolate into. This pervious surface replaces traditional pavement, allowing storm water to. This report will focus on the pavement applications of the concrete, which also has been referred to as porous concrete, permeable concrete, nofines concrete, gapgraded. Pervious pavements installation, operations and strength. This report will focus on the pavement applications of the concrete, which also has been referred to as porous concrete, permeable concrete, nofines concrete, gapgraded concrete, and enhancedporosity concrete. Therefore, there is an impending need for the development of quality control and acceptance specifications. To study the strength and durability characteristics of pervious concrete. Specifiers guide for pervious concrete pavement design. Pdf pervious concrete as a paving material has seen renewed interest due to its ability to allow water to flow through itself to recharge groundwater. Pervious pavement systems are now being recognized as a best management.
To design the concrete mix for pervious concrete with and without fine aggregate. In all cases, high permeability rates were achieved regardless of the compressive strength. If the ground surface exceeds a 20% slope, stormwater will run downhill over the permeable pavement as opposed to being absorbed by it as intended. Improper winter maintenance has been responsible for many failures of pervious concrete pavement surfaces. Pervious pavement systems, durability, and environment. Hydrologically, pervious concrete paving systems can. Permeable pavement 1008 wisconsin department of natural resources. Structurally, picp is a flexible pavement like asphalt.
Pervious concrete is typically design with high void content1525%. Permeable pavement is a pavement type with a porous surface that is composed of concrete, open pore pavers or asphalt with an underlying stone reservoir. Pervious concrete fhwa us department of transportation. What is pervious concrete pervious concrete is a special type of concrete with a high porosity used for concrete flatwork applications that allows water from precipitation and other resources to pass through it, thereby reducing the runoff from a site and recharging ground water levels.
Pervious pavement porous pavement, porous concrete asphalt p ervious pavement is made of either pervious asphalt or pervious concrete. Curing should begin within 20 minutes of concrete placement and continue through 7 days. Final report compressive strength of pervious concrete. Plastic sheeting is typically used to cure pervious concrete pavements. To provide objective information about permeable pavement for howard county, maryland homeowners who may wish to install or retrofit a permeable pavement driveway, patio or sidewalk on their property. Pervious concrete pavement description pervious concrete pavement is a permeable pavement, often with an underlying stone reservoir, that captures rainfall and stores runoff before it infiltrates into the subsoil. Pervious concrete also called porous concrete, permeable concrete, no fines concrete and porous pavement is a special type of concrete with a high porosity used for concrete flatwork applications that allows water from precipitation and other sources to pass directly through, thereby reducing the runoff from a site and allowing groundwater recharge. While pervious concrete pavements may be new to some areas of the country, florida and other southeastern states have been installing them since the 1970s to control runoff, erosion, and flooding. Mechanical and hydraulic properties page 3 of 19 1 introduction 2 a porous pavement system is an environmentally conscious alternative to a traditional 3 asphalt or concrete pavement system ferguson, 2005. Pervious concrete is a rigid pavement while porous asphalt, permeable pavers, flexible grids and gravel are all flexible pavements. Pervious concrete pavement is a permeable pave ment, often with an underlying stone reservoir, that captures rainfall and stores runoff before it infiltrates. Pervious concrete pavement systems are able to perform well. Batch weights for all constituents of one 1 cubic yard of the proposed pervious concrete mix. Pervious concrete is widely recognized as a sustainable building material, as it reduces stormwater runoff, improves stormwater quality, may recharge.
A pavement system designed to achieve water quality and quantity benefits by allowing movement of stormwater through the pavement surface and into a basesubbase reservoir. Permeable pavements are popular because the german approach to environmental protection. Both materials resemble conventional asphalt and concrete, but have more air spaces that allow water to pass through the pavement into a reservoir base of crushed aggregate, then infiltrate into the ground. Pervious concrete, sometimes referred to as nofines, gapgraded, permeable, or enhanced porosity concrete, is an innovative approach to controlling, managing, and treating stormwater runoff. Permeable interlocking concrete pavement, also referred to as picp, consists of solid concrete paving units with joints that create openings in the pavement surface when assembled into a pattern. This guidance considers pervious concrete pavement pcp, pervious asphalt pavement pap also known nationally as porous asphalt pavement, and permeable interlocking concrete pavement picp. Permeable pavement fact sheet information for howard. The specific gravity ssd of all aggregates to be used in the proposed pervious concrete mix. A pervious concrete pavement al lows the transfer of both water and air to root systems. Porous pavement operation and maintenance protocol general maintenance the primary goal of porous pavement maintenance is to prevent the pavement surface andor the underlying infiltration bed from being clogged with fine sediments.