A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Some Studies on Pavements on Flyash-Stabilized Expansive Subgrades
Construction of roads over expansive soils is associated with huge construction and maintenance costs. Stabilization of such subgrades with flyash is a cost-effective alternative to replacing the expansive subgrade with good quality borrow materials. Performance of stabilized pavements can be assessed and predicted on the basis of laboratory tests, full-scale field tests and numerical analyses. Numerical studies can simulate field and laboratory tests at very minimal costs and within a short duration. Hence, numerical analysis can be used for parametric studies to optimize the thickness of the stabilized subgrade. Engineering parameters of the untreated and treated expansive subgrade were found in a laboratory program. Static and dynamic analysis of axisymmetric models of pavement was conducted using Plaxis-2D. Improvement in parameters like vertical strain at top of subgrade and vertical displacement at top of pavement was found. The thickness of the granular layer and the treated subgrade layer was varied. The static analysis indicates that with the stabilization of the top 0.5 and 1.0 m thickness of subgrade layer, the design life of the pavement can be increased by 4–6 times and 30–70 times, respectively.
Some Studies on Pavements on Flyash-Stabilized Expansive Subgrades
Construction of roads over expansive soils is associated with huge construction and maintenance costs. Stabilization of such subgrades with flyash is a cost-effective alternative to replacing the expansive subgrade with good quality borrow materials. Performance of stabilized pavements can be assessed and predicted on the basis of laboratory tests, full-scale field tests and numerical analyses. Numerical studies can simulate field and laboratory tests at very minimal costs and within a short duration. Hence, numerical analysis can be used for parametric studies to optimize the thickness of the stabilized subgrade. Engineering parameters of the untreated and treated expansive subgrade were found in a laboratory program. Static and dynamic analysis of axisymmetric models of pavement was conducted using Plaxis-2D. Improvement in parameters like vertical strain at top of subgrade and vertical displacement at top of pavement was found. The thickness of the granular layer and the treated subgrade layer was varied. The static analysis indicates that with the stabilization of the top 0.5 and 1.0 m thickness of subgrade layer, the design life of the pavement can be increased by 4–6 times and 30–70 times, respectively.
Some Studies on Pavements on Flyash-Stabilized Expansive Subgrades
Lecture Notes in Civil Engineering
Latha Gali, Madhavi (editor) / Raghuveer Rao, P. (editor) / Nigade-Saha Sanjivani, D. (author) / Viswanadham, B. V. S. (author)
2020-09-13
22 pages
Article/Chapter (Book)
Electronic Resource
English
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