Perpetual pavement designs allow us to limit distresses to the easily repaired surface, says perroad developer david timm, pe. The pavement design process has as its objective, the design and management of a pavement throughout its life time in order to minimize the total cost. Sustainable perpetual asphalt pavements and comparative. 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. Perroad software perpetual pavement design software the apa offers two versions of its software for the design and analysis of perpetual pavements. Perpetual pavement design concept finally, the most important point in this brief perpetual pavement discussion is that it is possible to design and build hma pavements with extremely long design lives. Goal of perpetual pavement design design so there are no deep structural distresses bottom up fatigue cracking. About perpetual pavements asphalt pavement alliance. Perpetual pavement design an introduction to the perroad program. Papa info and links pennsylvania asphalt pavement association. The asphalt pavement alliance is hosting a webinar on may 30 to introduce version 4.
Perpetual pavement design software the apa offers two versions of its software for the design and analysis of perpetual pavements. Pavements designed and constructed in accordance with the perpetual pavement concept will last, and last, and last. In fact, some hma pavements in service today are living examples of perpetual pavements. Perpetual or longlife asphalt pavements are designed to perform longer than 50 years. Definition of perpetual pavement including its mechanisticempirical design principles and difference with.
Both versions of the software are available as free downloads. Sustainable perpetual asphalt pavements and comparative analysis of lifecycle cost to traditional 20year pavement design performed in cooperation with the texas department of transportation and the federal highway administration published. The program couples layered elastic analysis with a statistical analysis. A pavement designed so there are no distresses deep in the pavement structure. Throughout its life, an asphalt pavement s ride and performance are just as good as new. With perpetual pavement designs, asphalt roads can be built to stand the test of time with only minimal periodic maintenance. It was developed in response to requests by public works. Its the most costeffective way to ensure the high level of smooth.
Free asphalt mix design software updated concrete construction. 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. Mechanisticempirical pavement design guide me pdg and perroad are two software that can simulate the performance of these pavements. This comprehensive publication captures the activities that have taken place over the last decade, synthesizes the information in way that is useful to providing guidance for perpetual pavement design and construction, and provides a vision for further research and development to refine perpetual pavements. Webniar recorded may 30, 2017 discussing perpetual pavement design and introducing version 4.