EFFECT OF LOCUST BEAN WASTE ASH ON CEMENT MODIFIED BLACK COTTON SOIL

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✎: EFFECT OF LOCUST BEAN WASTE ASH ON CEMENT MODIFIED BLACK COTTON SOIL

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Keywords: EFFECT OF LOCUST BEAN WASTE ASH ON CEMENT MODIFIED BLACK COTTON SOIL

 

RESEARCH BODY

CHAPTER ONE
INTRODUCTION
1.1 Preamble
Geotechnical engineers are often faced with the problem of constructing road
beds on soil which do not have adequate strength to support the wheel loads imposed
upon them either in construction or during the service life of the pavement. It is
sometimes necessary to treat these soils, termed expansive soils to give a stable subgrade or working platforms for the construction of the pavement. Treatment of soil are
generally classified into two processes: soil modification or soil stabilization. The
purpose of sub-grade modification is to provide a working platform for construction
equipment, while sub-grade stabilization is meant to increase the strength and durability
of the soil.
1.1.1 Black cotton soil
Expansive soil can be found almost any where in the world but they are
basically confined to semi arid regions of the tropical /temperate zones. These areas are
usually characterized by marked dry and wet seasons with low rainfall, poor drainage
and exceedingly great heat. The precipitation is such that the annual evaporation
exceeds the precipitation (Chen, 1988).
Two groups of parent rock materials have been associated with the formation of
expansive soils. The first group comprises sedimentary rock of volcanic origin, which
can be found in North America, South Africa and Israel (Ola, 1978). The second group
of parent materials are basic igneous rocks found in India, Nigeria and South Western
U.S.A (Plait, 1953). Tropical black clays are formed by weathering (Morin, 1971).
Black cotton soil shows high shrink – swell characteristic with surface cracks opening

Keywords: EFFECT OF LOCUST BEAN WASTE ASH ON CEMENT MODIFIED BLACK COTTON SOIL

 


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Keywords: EFFECT OF LOCUST BEAN WASTE ASH ON CEMENT MODIFIED BLACK COTTON SOIL

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