Pervious concrete, sometimes referred to as nofines, gapgraded, permeable, or enhanced porosity concrete, is an innovative approach to controlling, managing, and treating stormwater runoff. The final design consists of 240 mm of pervious concrete over 100 mm of open graded clear stone, over 200 mm of granular base material, over select subgrade material, over silty sand subgrade. Both hydraulic and structural design of pervious concrete pavements are discussed, as well as construction techniques. Although the initial cost of pervious installation may be slightly higher, concrete saves money in the long run due to its superior durability and strength. A pervious concrete pavement may be placed with either fixed forms or slipform paver. Acpa, cementtreated permeable base for heavytraffic concrete pavements, is404, american concrete pavement in recent years, several agencies have experimented with or specified drainable pavements on interstate and other major roadways where experience has indicated the potential for pavement faulting and pumping. Final report compressive strength of pervious concrete.
At the aasho road test, it was found that the concrete pavements with granular bases could carry about 30% more traffic. Compressive strength of pervious concrete pavements. Obla pervious concrete is a special high porosity concrete used for flatwork applications that allows water from precipitation and other sources to pass through, thereby reducing the runoff from a site and recharging ground water levels. Another concern in cold climates is that infiltrating runoff below the pavement may cause frost heave, although design modifications that provide for an stormwater management with pervious concrete pavement. The most common approach to placing pervious concrete is in forms on grade that have a riser strip on the top of each form such that the strike off device is actually 3812 in. The maintenance plan should be developed to assure proper maintenance procedures are followed. Freezethaw resistance of pervious concrete depends on its. Plastic sheeting is typically used to cure pervious concrete pavements. Announcement this program is registered with the aiaces for. The pervious concrete system and its corresponding strength are as important as its permeability characteristics.
Cleaning methods for pervious concrete pavements request pdf. Pervious concrete pavement maintenance and operations guide. Multiple samples were taken from the existing pavement and. Its major constituents are cement, coarse aggregates, water and if required, admixtures. The basic features of these three concrete pavement types are shown in figure 1. 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. When used in pavement applications, pervious concrete can effectively capture and store stormwater runoff, thereby allowing the runoff to percolate into. Materials used are opc type i, fine aggregate corresponding to grading ii and four sizes of coarse aggregate namely, 4. Aug 31, 2016 pervious concrete is a special type of concrete. While pervious pavements have become very popular in the area of stormwater. Installing permeable concrete or picp requires experience and expertise and should not be attempted by the general public.
This study presents the influence of fine aggregate and coarse aggregate quantities on the properties of pervious concrete. Curing ensures sufficient hydration of the cement paste to provide the necessary strength in the pavement section to prevent raveling. Pervious concrete is usually more freezethaw durable than conventional concrete. This pervious surface replaces traditional pavement, allowing stormwater to infiltrate. Pervious concrete pavements provide many environmental benefits and are deemed a stormwater management best practice. When pervious concrete pavement systems are designed with a stone reservoir, the reservoir should be of sufficient depth to accommodate stormwater storage for the design storm event. Crushed concrete may be reused as an aggregate in new portland cement.
It requires fewer repairs than asphalt, and has a longer overall lifespan as well. Pervious concrete is a special high porosity concrete used for flatwork applications that allows water from precipitation and other sources to pass through, thereby reducing the runoff from a site. The strength of the system not only relies on the compressive strength of the pervious concrete but also on the strength of the soil beneath the support. Pavement design subbase effects the current design does not model the contribution of bases accurately. Permeable interlocking concrete pavements vii acknowledgements taking a project from idea to reality often takes longer than anticipated. Testing for pervious concrete pavement concrete construction. The work described in this paper provides an evaluation of an aged pervious concrete pavement in the northeastern united states to provide a better understanding of the longlasting effects of placement techniques as well as the longterm field performance of porous pavement, specifically in areas susceptible to freezing and thawing. Stormwater management with pervious concrete pavement. Pervious concrete pavement has the same siting considerations as other infiltration practices. Practices vary from state to state, but dowel bars are typically required in eightinch or thicker pavements. Pervious concrete is a nofines concrete mix which is intended for use as an opengraded drainage material. This guidance considers pervious concrete pavement pcp, pervious asphalt pavement pap also known nationally as porous asphalt pavement, and permeable interlocking concrete pavement picp.
Pervious concrete pavement maintenance and operations guide 3 pervious concrete maintenance. August 2010 the indian concrete journal pervious concrete an overview karthik h. Concrete pavements have a significantly lower lifecycle cost than alternatives such as asphalt. Report on pervious concrete provides technical information on pervious concrete s application, design methods, materials, properties. Scott has been involved with over 150 pervious concrete placements and is an active voting member of the aci 522 pervious concrete committee. Pip 1 guide to specifying pervious concrete background recommendations and specifications for pervious concrete pavement are published by the american concrete institute aci committee 522. The voids in the pervious concrete allow for water which expands 9% when it turns into ice to expand and contract within the voids. Many practicing engineers are unaware of the basic design issues which should really be understood before undertaking the construction of any pavement in concrete. Mixes were prepared with the water cement ratio of 0. For adequately designed pavements, the deflections under load are small and the. Preliminary procedure for structural design of pervious concrete pavements research activities pc mixtures were prepared at the concrete material characterization laboratory in washington state university wsu using two mixture designs and two types of coarse aggregate. When used in pavement applications, pervious concrete can effectively capture and store stormwater runoff, thereby allowing the runoff to percolate into the ground and recharge groundwater supplies. Plan and practice maintenance of the pervious concrete pavement is the responsibility of the property ownermanager. Curing should begin within 20 minutes of concrete placement and continue through 7 days.
The rigidity of concrete enables it to distribute loads over relatively large areas of support. The elimination of fine aggregate creates a fairly large void structure between the coarse aggregate particles, resulting in a concrete mix that is permeable to water. Acoustic properties of clogged pervious concrete pavements by bernard igbafen izevbekhai biography bernard igbafen izevbekhai is the concrete research operations engineer for the minnesota department of transportation. Pervious concrete pavements have not been lost to freezethaw conditions. Pervious pavement porous pavement, porous concrete asphalt p ervious pavement is made of either pervious asphalt or pervious concrete.
This may minimize the need to apply deicing materials to the pervious concrete pavement. Improper winter maintenance has been responsible for many failures of pervious concrete pavement surfaces. Filtercrete pervious concrete is a structural pavement. Longterm field performance of pervious concrete pavement. Preliminary procedure for structural design of pervious. Studies on characterization of pervious concrete for pavement.
Concrete construction, concrete finishing, friction course, pavement grooving, pavement performance, portland cement concrete, studded tires, surface course \ pavements \, wear keywords longitudinal tining, transverse tining, carpet drag, pavement finishes, portland cement concrete pavement, pccp, washington state. Pervious concrete pavement maintenance guidelines the use of chemicals to clean pervious concrete pavements is not recommended. Design and construction of a pervious concrete pavement. 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. August 2016 continuously reinforced concrete pavement manual. Anything outside of this range may be considered unacceptable. For making pervious concrete, no fine aggregates are not used. Download concrete pavement design guidance notes by geoffrey griffiths and nick thom concrete pavements are a frequently misunderstood form of construction. Pervious concrete pavement maintenance and operations guide 5 winter maintenance this is a critical aspect of owning a pervious concrete pavement. In cooperation with the national ready mixed concrete 12.
Cleaning methods for pervious concrete pavements article in international journal of construction education and research 92. Concrete pavement design, construction, and performance. Post construction stormwater management in new development and redevelopment subcategory. It is suggested that only water be used to flush the pervious. Pervious pavements allow stormwater to flow into the soil as opposed to flowing over impervious surfaces picking up accumulated contaminants and carrying them offsite. Concrete pavement construction basics placing dowel baskets dowel bars transfer heavy loads across joints in the pavement, preventing faulting at the joint that can lead to pavement damage. 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.
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. Pervious concrete pavements enviromental concrete the. Not just a pavement, but a stormwater management system. The current design procedures allows concrete pavements built with granular bases to carry about 5 8% more traffic. Infiltration description pervious concrete is concrete with reduced sand or fines and allows water to drain through it. Even if the manufacturers suggested directions are followed, the impact on other components of the pavementstorm water system may not be known.
1374 961 1302 1088 261 738 918 1452 397 1268 122 1190 700 652 1258 1375 1477 4 168 1271 997 1246 921 226 1320 1169 1181 39 1493 1219 755 1321 402 1213 1103 422 267 924 1016 1129 378 550