A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Potential Benefits of Geosynthetics in Flexible Pavement Systems
The study was primarily concerned with the geosynthetic reinforcement of an aggregate base of a surfaced, flexible pavement. Separation, filtration and durability were also considered. Specific methods of reinforcement evaluated included reinforcement placed within the base, pretensioning a geosynthetic placed within the base, and prerutting the aggregate base with and without reinforcement. Both large-scale laboratory pavement tests and an analytical sensitivity study were conducted. A linear elastic finite element model having a cross-anisotropic aggregate base gave a slightly better prediction of response than a nonlinear finite element model having an isotropic base. The greatest benefit of reinforcement appears to be due to small changes in radial stress and strain in the base and upper 12 inches of the subgrade. Greatest improvement occurs when the material is near failure. Reinforcement is effective for reducing rutting in light sections having structural numbers less than 2.5 to 3 placed on weak subgrades (CBR < 3%). As the strength of the section increases, the potential benefits of reinforcement decrease.
Potential Benefits of Geosynthetics in Flexible Pavement Systems
The study was primarily concerned with the geosynthetic reinforcement of an aggregate base of a surfaced, flexible pavement. Separation, filtration and durability were also considered. Specific methods of reinforcement evaluated included reinforcement placed within the base, pretensioning a geosynthetic placed within the base, and prerutting the aggregate base with and without reinforcement. Both large-scale laboratory pavement tests and an analytical sensitivity study were conducted. A linear elastic finite element model having a cross-anisotropic aggregate base gave a slightly better prediction of response than a nonlinear finite element model having an isotropic base. The greatest benefit of reinforcement appears to be due to small changes in radial stress and strain in the base and upper 12 inches of the subgrade. Greatest improvement occurs when the material is near failure. Reinforcement is effective for reducing rutting in light sections having structural numbers less than 2.5 to 3 placed on weak subgrades (CBR < 3%). As the strength of the section increases, the potential benefits of reinforcement decrease.
Potential Benefits of Geosynthetics in Flexible Pavement Systems
R. D. Barksdale (author) / S. F. Brown (author) / F. Chan (author)
1989
64 pages
Report
No indication
English
Highway Engineering , Fibers & Textiles , Flexible pavements , Bituminous coatings , Petroleum products , Reinforcement(Structures) , Aggregates , Mathematical models , Separation , Filtration , Durability , Prestressing , Graphs(Charts) , Polymers , Polypropylene , Polyethylene , Nylon , Polyester fibers , Synthetic fibers , Grids(Coordinates) , Stiffness , Subgrades , Tables(Data)
Potential benefits of geosynthetics in flexible pavement systems
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