Base, pg 6422 compacted to 93% minimum density 4 302 bit. Apa 101 cvr civil engineering university of memphis. However, it is a type of asphalt that combines all the smoothness and safety of asphalt, but in multiple layers. Surface distresses can be removed repaired relatively easily, before causing structural damage, leaving most of pavement in place. Tales from the building permanent road perpetual pavements. Application of the concept produces a deepstrength asphalt pavement that can resist structural fatigue distress for a long time at least 50 years and, thus, results in a longlived pavement. Perpetual pavement combines the welldocumented smoothness and safety advantages of asphalt with an advanced, multilayer paving design process, that with routine maintenance, extends the useful life of a roadway. Longlife asphalt pavement prejob meeting 2011 caltrans is constructing two longlife asphalt pavement projects on i5 in the north state district 2. This synthesis begins with a discussion of perpetual pavement design for both new and rehabilitation designs. By definition, a perpetual pavement is a longlasting thick hma pavement structure with a service life in excess of 50 years without major structural rehabilitation andor reconstruction activities in particular the intermediate and bottom layers. Nowadays, the only rehabilitation required is removal of the surface and resurfacing with an asphalt overlay. The perpetual pavement gives engineers the ability to design for specific modes of distress.
The perpetual pavement concept has been utilized throughout the us. Evaluating the performance of sustainable perpetual pavements. Perpetual pavement is a flexible but strong asphalt pavement that doesnt exhibit structural damage even when very high traffic flows over long periods of time. Asphalt roads that were built decades ago have inadvertently become perpetual as the lower lifts are still in place serving as the base while the surface has either been milled and replaced or had additional lifts added to it. Perpetual pavement concept asphalt pavements with high enough strength will not exhibit structural failures. Perpetual pavement for the marquette interchange project. Pdf perpetual pavement a boon for the indian roads. In the case of staged construction, the 35plus year time frame against which the award criterion is evaluated begins when all staged construction is. This comprehensive publication captures the activities that have taken place over the last decade, synthesizes the information in way that. Reformulated pavement remaining service life framework. This means that fulldepth reconstruction is a thing of the past. Perpetual pavements are not just for highway projects many municipal pavements can also be designed as perpetual pavements increasing the thickness of the hot mix layers by 25 to 35 percent will likely result in a perpetual pavement there are tools to allow municipalities to look at perpetual pavement options.
Perpetual pavement washington asphalt pavement association. Perpetual pavements in texas performance evaluations and structural design tom scullion tti. A perpetual pavement is defined as a hma pavement designed and built to last longer than 50 years without requiring major structural rehabilitation or reconstruction, and needing only periodic surface renewal in response to distresses confined to the top of the pavement. Consideration of sustainability in pavement design. In this study, combinations of layer, stiffness, and thickness that produce an optimal perpetual pavement are determined for implementation on new mexico state highways. Design concepts and perpetual pavement arizona pavements. Timm chapter 1 introduction pavement engineers have been producing longlasting hotmix asphalt hma pavements since the 1960s. About perpetual pavements asphalt pavement alliance. If so, share your ppt presentation slides online with. Pavement monitoring was conducted to determine not only the long term performance but the potential of perpetual pavements to be classified as a sustainable pavement strategy. The concept of perpetual pavements, or longlasting hma pavements, is not new. Ncat experience with perpetual pavements and high polymer mixtures.
A synthesis, 2010, trl 250, design of longlife flexible pavements, nunn et al. Perpetual pavement a type of deepstrength pavement. Distresses will initiate at the surface, typically in the form of rutting or cracking. Distribution, posting, or copying of this pdf is strictly prohibited without written permission of the transportation research board of the national academy of sciences. Perpetual pavement missouri asphalt pavement association. Aperpetual pavement is defined as an asphalt pavement designed and built to last longer than 50 years without requiring major structural rehabilitation or reconstruction, and needing only periodic surface renewal in response to distresses confined to the top of the pavement. Perpetual pavement design and sustainability purdue engineering.
The vast highways network in china is moving from the phase of construction to the phase of maintenance, and with the introduction of new technique of perpetual pavement in last decade, it is necessary to consider recycling as one of the promising. Perpetual pavements are not just for highway projects many municipal pavements can also be designed as perpetual pavements increasing the thickness of the hot mix layers by 25 to 35 percent will likely result in a perpetual pavement there are tools to allow municipalities to look at perpetual pavement options perroad v3. Perpetual pavement is a term used to describe a longlasting structural design, construction and maintenance concept for hma pavements. Standard specification for urban infrastructure works 47 edition 1, revision 02 oct 2010. Definition of perpetual pavement including its mechanisticempirical design principles and difference with conventional pavement are discussed.
Help file is the users manual press f1 at any time for help file. Perpetual pavement the resulting perpetual pavement design. Design and construction concepts flexible pavements of ohio. The concept of perpetual pavements, or longlasting asphalt pavements, is not new. Asphalt is one of the indispensable materials of life in america. Perpetual pavement design for local roads traffic truck volumes, truck types, axle weights, etc.
Perpetual pavement is constructed in such a way that distress occurs in the top layer only, leaving the base intact. A suggested typical section was prescribed similar to the perpetual pavement concept developed by the asphalt institute 2. Perpetual pavements asphalt pavement association of michigan. Perpetual pavement award started by the asphalt pavement alliance in 2001. Perpetual pavement design construction considerations layer considerations renewable surface. Perpetual pavement demonstration burton scot contractors. Ncat pavement test track topdown cracking in perpetual pavements routefill versus blowband crack sealing fatigue cracking in thinner structures crack inhibiting interlayer treatments pavement preservation on lee road 159. Evaluating life cycle costs of perpetual pavements in china. Highway transportation is considered as vital factor in chinas economic growth. By using a 3layer design build a perpetual pavement absolutely asphalt for cost, for convenience, for comfort.
Many perpetual pavements have been built over the years. This is followed by a summary of material characteristics to be considered in design and performance. This report provides details on the design, installation and monitoring of a pavement instrumentation system for the analysis of loadinduced stresses and strains within a perpetual hma pavement system. Theyre made up of multiple layers of durable asphalt. Perpetual pavement design concept based on construction of a pavement where distresses occur in the pavement surface layer. Perpetual pavement is defined as an asphalt concrete pavement that is built to last for 50 years or longer without any maintenance other than occasional replacement of the thin but durable wearing course. The general perpetual pavement design philosophy by definition, a perpetual pavement is a longlasting thick hma pavement structure with a service life in excess of 50 years without major structural rehabilitation andor reconstruction activities in particular the intermediate and bottom layers. Perpetual pavement design philosophy sensitivity study program basics example problems design simulations. Dec 01, 2012 national asphalt pavement association napa special feature perpetual pavement is a concept that was developed and has traditionally been marketed for highvolume applications like freeways and. The hma pavement was constructed as part of an urban highway improvement project in the city of milwaukee, wisconsin. Index reformulated pavement remaining service life. If properly maintained and rehabilitated, a perpetual pavement can be designed and built to last longer than 50 years without requiring major structural rehabilitation or reconstruction. The apas newest technical document on the subject is perpetual asphalt pavements. Figure 1 shows the proposed pavement structure for the texas perpetual pavements.
Pdf evaluating the performance of sustainable perpetual. Pdf perpetual flexible pavement design life researchgate. The concept of perpetual pavements, or longlasting hma pavements, is. Pfcs are highly recommended in locations where overall traffic volume is high and average rainfall is at least 25inches per year. Perpetual pavement is engineered so that any distress that occurs is. Structural design of longlife asphalt pavements marshall r. If properly maintained and rehabilitated, a perpetual pavement can be designed and built to last longer than 50 years without requiring major structural rehabilitation or reconstruction, and needing only periodic surface renewal in response to. Pavements designed and constructed in accordance with the perpetual pavement concept will last, and last, and last. The renewable surface lift will need periodic 814 years replacement. The perpetual pavement concept was formally recognized in 2000 by the asphalt pavement alliance apa. Perpetual pavement is the name coined to describe a threelayer, flexible pavement design and construction concept. Think about the fact that 93 percent of the paved roads in america are surfaced with asphalt. Perpetual pavement perpetual pavement combines the welldocumented smoothness and safety advantages of asphalt with an advanced, multilayer paving design process, that with routine maintenance, extends the useful life of a roadway. They defined a perpetual pavement as an asphalt pavement designed and built to last longer than 50 years without requiring major structural rehabilitation or reconstruction, and needing only periodic surface renewal in response to distresses confined to the top of the pavement.
Since 2001, texas has been designing and constructing perpetual pavements pps on heavily trafficked highways where the estimated 18kip equivalent single axle loads esals exceed 30 million after a 20year design period. Next, a strongload bearing intermediate course is placed over the base course. Perpetual pavements washington asphalt pavement association. Perpetual pavements perpetual pavement ontario asphalt. Don valley parkway in the city of toronto was chosen by. Longlife asphalt pavement perpetual pavement calapa. These thick, fulldepth, pavements are built using thick base courses that are extremely flexible. The required thickness of a perpetual pavement varies from 10 to 15 in. This comprehensive publication captures the activities that have taken place over the last decade, synthesizes the. Perpetual pavement design is the property of its rightful owner. If the perpetual pavement structure is designed too thin, the risk of bottomup cracking. The perpetual pavement concept was first articulated in 2000 and the concept has rapidly gained acceptance.
Special considerations for the construction of perpetual pavements 4. Once various pavement design alternatives have been developed, lcca, lca, and pavement sustainability rating tools can be applied to assess economic, environmental, and societal impacts to varying degrees as a way of improving the sustainability aspects of the proposed pavement designs. Surface distresses can be removed repaired relatively easily. The commission and the project team are excited about this perpetual pavement project and the longterm value to be realized for future reconstruction work. This reduces user delays and rehabilitation costs, offsetting the higher initial cost of installation. Additionally, perpetual pavements with and without richbinder layers rbls are examined in this study. A perpetual pavement is defined as an asphalt pavement designed and built to last longer than 50 years without requiring major structural rehabilitation or reconstruction, and needing only periodic surface renewal in response to distresses confined to the top of the pavement. For example, in oklahoma city, two sections of interstate 40 were built with this design in 1967, long before the perpetual pavement name and concept were formally recognized. The result is a longlasting pavement, one that serves the traveling public well, provides true value to the taxpayers, and demonstrates both the convenience and the quality of asphalt pavements. Recommendations are made for using a perpetual pavement that does not include a. About perpetual pavements the perpetual pavement concept was first articulated in 2000 and the concept has rapidly gained acceptance.
The research and application of perpetual asphalt pavement pp technology have been. Perpetual pavement uses an advanced design process that lays asphalt in multiple layers to increase durability, strength, and longevity in roads and highways. Resistance to bottomup fatigue cracking is provided by the lowest asphalt layer, which has a higher binder content, or by the total thickness of pavement reducing tensile strains in the base layer to an insignificant level. Perpetual pavement a boon for the indian roads article pdf available in procedia social and behavioral sciences 104. Asphalt pavements can be constructed to last indefinitely, they are known as perpetual pavements. Minimum project length is two 2 miles for all roadway types. One such innovation is perpetual pavement hotmix asphalt pavement that holds. Jun 14, 2017 webniar recorded may 30, 2017 discussing perpetual pavement design and introducing version 4. Learn about asphalt pavement and how it can benefit you. Sustainable perpetual asphalt pavements and comparative. The perpetual pavement pp is defined by asphalt pavement alliance apa 2002 as an asphalt pavement designed and built to last longer than 50 years without requiring major structural rehabilitation or reconstruction, and needing only periodic surface renewal in response to distresses confined to the top of the.
Pdf evaluating life cycle costs of perpetual pavements. The use of perpetual pavements is intended to reduce major rehabilitation works and the. Evaluating the performance of sustainable perpetual. Unless otherwise indicated, all materials in this pdf are ed by the national academy of sciences.
Perpetual pavements hawaii asphalt paving industry. Since 2001, texas has been designed and constructed 10 sections of perpetual pavement pp on heavily trafficked highways. Perpetual pavement mike mamlouk arizona state university. Perpetual pavement design an introduction to the perroad program. Shorter projects may be eligible for the municipalroadway street perpetual pavement award. The premise of these roadways was to first establish the road. Base material shall be manufactured from hard, durable stone or recycled building materials free of clay lumps, organic matter and other deleterious substances. For the sake of discussion, lets call these longlasting, neverreconstructed roads permanent pavements. Ncat as one of the 8 inaugural winners of the apa perpetual. Marvin traylor, illinois asphalt pavement association for use of slides and information trb circular 503, perpetual bituminous pavements, 2001 perpetual asphalt pavements.
Evaluation of a hot mix asphalt perpetual pavement. Aug 16, 2017 perpetual roads are found throughout america. Ppt perpetual pavement design powerpoint presentation. Perpetual pavement design southeast pavement management and design conference june 21, 2005. Research has shown that wellconstructed and adequately designed flexible. Perpetual pavement an inch at a time equipment world. Perpetual pavement design construction considerations. Performance of a perpetual pavement on highway 406 in ontario susanne chan. Perpetual pavement design asphalt pavement association of. The vast highways network in china is moving from the phase of construction to the phase of maintenance, and with the introduction of new technique of perpetual pavement in last decade, it is necessary to consider recycling as one of the promising solutions for rehabilitation of old asphalt concrete pavement and ultimately to convert them into perpetual pavements. Perpetual pavement summary by designing for the fatigue limit of the material rather than traffic repetitions. Definition of perpetual pavement including its mechanisticempirical design principles and difference with. Me perpetual pavement design and analysis tool help file is the users manual press f1 at any time for help file.