The Classification Of Lateritic Soils In Ikole As A Road Construction Material

ABSTRACT

The performance of a pavement depends on the quality of its base, sub-base layers and sub

grade. As the foundation for the pavement's upper layers, the subgrade layer plays a key

role in mitigating the detrimental effects of static and dynamic stresses generated by traffic.

Therefore, building a stable base course is vital for constructing an effective and long

lasting pavement system. This study proceeds from the basis that, construction of

foundations of most engineering structures, requires that adequate information about the

engineering properties of the soil and sub-soil condition of the area are established prior to

the conception of works. This is necessary for the engineering planning, design and

construction of such foundations to be based on sound geotechnical parameters. To

achieve the objectives of the study, different soil test such as CBR test, compaction test,

sieve analysis, triaxial and specific gravity tests were carried out on soil samples taken at

Asin, Oke-orin, Ikoyi and FUOYE ikole campus soils. The test results aided in the

classification of these soil samples using AASHTO soil classification system to detem1ine

the suitability of these lateritic soils to be used as road construction material. The soils were

classified as A-2-7, A-7-6, A-2-6 and A-2-7 for Asin, Campus, Tkoyi and Oke orin samples

respectively.