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Evaluation of Porous Asphalt Pavements in Urban Areas

Koohmishi, Mehdi | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 43528 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Tabatabaee, Nader
  7. Abstract:
  8. Open graded asphalt mixturesareasphaltic mixes used in flexible pavements and the mainadvantages of them are increased permeability and noise reduction. Conventional application of these mixtures in flexible pavement is like that fluids infiltrate into porous asphalt layer that places over a dense graded asphalt layer and then draintoward ditches along the two sides of the road. Another usage of these mixtures, considered in recent years, is in porous pavements that the structure permits water on the surface topass freely through it and to infiltrateinto thesubsoil. In this research, second application of open graded asphalt mixtures is considered, i.e., porous asphalt pavement. In this type of pavements, top layer consists of porous asphalt mixtures and under layers have high permeability. Therefore runoff on the pavement surface penetrates into under layers and subsoil. The main problem in relation to porous asphalt pavements is their load bearing capacity for various traffic and precipitation conditions. So, in this researchdifferent structures for porous asphalt pavement layers were considered and performance of these pavements wasevaluated according to traffic and climatic conditions. For this purpose, pavement analysis and design softwares and climatic files for regions with different amount of precipitation were used.
    According to this, approximately 500 analyses were conducted that results indicatedmain distresses in these pavements were longitudinal fatigue cracking and rutting. Also, according to obtained results, appropriate cross section and construction method were proposed for various climatic conditions.
  9. Keywords:
  10. Porous Friction Courses (PFC) ; Application Identification ; Porous Asphalt ; Permeability ; Pavement Performance

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