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Title: Reinforced flexible pavement design over clayey Subgrades
Researcher: Konudula Chinnapa Reddy
Guide(s): Satyanarayana Reddy, C N V
Keywords: Civil Engineering
Clay Subgrades
Reinforced flexible pavement design
Expansive Soils
Upload Date: 13-May-2013
University: Andhra University
Completed Date: 2013
Abstract: The development of any country depends on accessibility and interconnectivity to different places through well connected transportation network. Road transportation is the most adaptable mode of transport under varied conditions of topography and hence top priority is given by the governments to improve road transportation facilities throughout the world by allocating huge capital investments. About 40% of total land in India is covered by clayey soils and inevitably the roads have to pass through such subgrades. Generally flexible pavements are preferred to rigid pavements due to less initial cost, smooth riding surface and easy maintenance. The design pavement thickness over clay subgrades is more due to their low soaked CBR values and so the construction cost is high. In spite of providing large pavement thickness, common failures noticeable in flexible pavements over clayey soils are excessive rutting, wavy surface, longitudinal cracking along wheel track and shear failure in edge region. Further, expansive clays pose serious problems to construction of pavements due to their shrink-swell behavior with moisture fluctuations and also make pavement construction expensive due to their very low strength in saturated condition resulting from swelling. Efforts are being made by researchers (Katti, 1979; Natarajan and Shanmukha Rao, 1979, Steinberg, 1992, Ramana Murthy, Prasada Raju) from time to time to improve the strength and stability of the clay subgrades in general and expansive soils in particular by stabilisation, reinforcing, moisture control and soil replacement techniques. The advent of geosynthetics has drawn the attention of highway engineers to consider them for use in pavement construction to enhance performance. Particularly, synthetic geotextile due to its multi functional behavior has been used in the control of reflection cracking in overlays, as separator- filter - drain at clay subgrades during the last two decades.
Pagination: 100p.
Appears in Departments:Department of Civil Engineering

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01_title.pdfAttached File30.22 kBAdobe PDFView/Open
02_declaration.pdf27.5 kBAdobe PDFView/Open
03_certificate.pdf28.69 kBAdobe PDFView/Open
04_acknowledgements.pdf13.36 kBAdobe PDFView/Open
05_abstract.pdf19.05 kBAdobe PDFView/Open
06_contents.pdf82.88 kBAdobe PDFView/Open
07_list of tables.pdf28.25 kBAdobe PDFView/Open
08_list of figures.pdf100.18 kBAdobe PDFView/Open
09_chapter 1.pdf103.46 kBAdobe PDFView/Open
10_chapter 2.pdf339.56 kBAdobe PDFView/Open
11_chapter 3.pdf409.43 kBAdobe PDFView/Open
12_chapter 4.pdf564.53 kBAdobe PDFView/Open
13_chapter 5.pdf365.57 kBAdobe PDFView/Open
14_chapter 6.pdf119.4 kBAdobe PDFView/Open
15_chapter 7.pdf137.31 kBAdobe PDFView/Open
16_references.pdf176.67 kBAdobe PDFView/Open
17_appendix.pdf1.03 MBAdobe PDFView/Open

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