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The products developed under NCHRP 1-37A have provided advancements in pavement design practices and work is continuing under NCHRP, FHWA and various state agencies. FAARFIELD 1.42 was the standard thickness design software accompanying cancelled AC 150/5320-6F, Airport Pavement Design and Evaluation, and is provided here for convenience only. In 2004, NCHRP 1-37A was completed and delivered a mechanistic-empirical pavement design guide and accompanying software. To download the current standard software, use the following link: FAARFIELD 2.1. In 1996, to achieve a state-of-the-practice pavement design procedure, the AASHTO Joint Task Force on Pavements sponsored the development of a mechanistic-empirical design guide for new and rehabilitated pavements, through the National Cooperative Highway Research Program (NCHRP). The AASHTO Road Test was conducted from 1958 to 1960 using limited pavement sections and modest traffic levels as compared to those used today. When the program is downloaded, run it by double-clicking its icon or by choosing 'Run' from your computers Start Menu.
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Click here for the FPS 21 install program ('FPS21Setupv18.exe', 11.9 MB). The basis of this design has been the empirical equations developed from the AASHO Road Test. TxDOT Pavement Design and Analysis Training Site Downloading the Design and Analysis Programs FPS 21. From that we obtained total 20 cross-sections to be analyzed using KENLAYER software in terms of Rutting and Fatigue premature failures.The 1993 AASHTO Guide for the Design of Pavement Structures (and previous versions) is one of the primary documents used by state highway agencies for designing new and rehabilitated pavements. Pavement was analyzed by altering the thicknesses of bituminous courses by ± 25 percent. For achieving that objective NHA (N-55) section of road in Sehwan Pakistan was taken as a reference pavement. Thus, the object of this research study is to analyze a flexible pavement with respect to rutting and fatigue distresses using KENLAYER software tool. This PDF document covers the principles, methods and criteria for pavement design, as well as the materials, construction and maintenance aspects. Resistance to Rutting failure is checked by calculating vertical compressive stress at the top of soil sub-grade layer, while resistance to fatigue failure is checked by calculating horizontal tensile strain at the bottom of asphaltic layer using KENLAYER software tool. Learn how to select and design flexible pavements for different road conditions and traffic loads with this comprehensive guide from the Australian Flexible Pavement Association. KENLYER software tool is utilized to calculated accurately stresses and strains in asphaltic pavement that are ultimately used in calculating allowance for rutting and fatigue failure utilizing Asphalt Institute design models or formulas. Thus, there is a need of using a Mechanistic based design methodology like KENPAVE software, so that traditional design errors should be overcome. For proper performance and good serviceability, these premature distresses should be resisted. Sudden variation of heavy axle loaded vehicles, improper mix design and traditional design methodologies used in pavement design industries are major factors behind these failures. Rutting and Fatigue are taken as main premature failures among all distresses, as these distresses have wide effect on performance of pavement.