CHAPTER ONE
INTRODUCTION
1.1 BACKGROUND OF THE STUDY
During the last decade, the global demand for indigenous laterite soil has continued to increase. This growing demand has generated interest in the use of red tropical soils for road materials especially in the developing countries. There have been several cases of pavement failures due to poor laterite materials. Hence, it calls for improvement of the engineering properties of laterite soil to improve compressive strength and durability. The red soil which is in abundant supply in Nigeria, poes unique challenges.
The use of this as a road material is encourage by several advantages such as:
Despite the advantages, the use of this soil as a road material has not been fully utilized. This is because there has not been much research into the ways by which the bearing capacity of the soil can be improved.
The increasing growth in population and the corresponding increase in demand for road construction in Nigeria during the last two decades have generated increased interest in the ways by which the strength properties of laterite can be improved.
1.2 AIM AND OBJECTIVES
The aim of this project is to assess the effects of quarry dust on the engineering properties of lateritic soil.
The underlying objectives are to:
1.3 SIGNIFICANCE OF THE STUDY
The need for the study is to provide maximum improvement effects of quarry dust on latarite. It is necessary for civil engineering professionals to know the effect of quarry dust additive on latarite.
Also, a lasting solution may be provide to the constant road failure due to poor grade, sub-base and base course materials.
1.4 STATEMENT OF PROBLEM
Today, various pavement distresses have been observed on the road due to use of poor lateritic materials for road construction. Researches on the effect of quarry dust (additive) on laterite was only done to a certain extents.
Time restraint is one of the problems impeding detailed research work on the use of quarry dust additive for improving soil. Research work was done to a certain stage due to lack of sufficient time.
1.5 SCOPE OF THE STUDY
The scope of the study essentially centered on the use of quarry dust for improving lateriitc soil.
The study is limited only to analysis of lateritic soil collected from Osogbo town. It involves carrying out various laboratory tests such as Atterbergs limit, Compaction and C. B. R test on the soil before and after the addition of the quarry dust.
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