Ameliorated Design and Construction Techniques of Pavements on Expansive Soils.
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Date
2003-02
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Addis Ababa University
Abstract
The main cause of the economic losses incurred for
pavements built on swelling subgrade is the lack of
appropriate selection of the design and construction
method adopted to alleviate the swelling phenomena. The
extent of the problem depends mainly on the degree of
expansiveness of the soil and the corresponding climatic
conditions. Current situation Ethiopia shows that random
selection of design & construction methods is widely
practiced despite the various soil and climatic
condition. Most of the practices aim at undefined use of
the design and construction method that results in
uneconomical and unsafe pavement design. The
effectiveness of the methods depends also on the
selection of the design depth, a design depth that suits
the technical and economical conditions.
Chapter two consists the review of the performance and
suitability of the various design and construction method
adopted in most part of the world including Current
practices in this country.
In Chapter three, an attempt has been put to see the
consideration of potential expansiveness and assessment
of the various prediction methods of heave and swelling
pressure for the existing experimental values.
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Keywords
Expansive ;Soils