Project Abstract

Abstract
This research project focuses on conducting a basic soil test on the subgrade soil material for the flexible pavement design on the road linking Ugwuaji and Campus IMT Enugu. The study aims to assess the soil properties of the subgrade material to determine its suitability for supporting the pavement structure. Various laboratory tests such as the moisture content, grain size analysis, specific gravity, and compaction tests were performed on the soil samples collected from the project site. The results of the soil tests revealed important information about the engineering properties of the subgrade soil material. The moisture content test indicated the amount of water present in the soil, which affects its compaction characteristics and overall stability. The grain size analysis helped in determining the distribution of particle sizes in the soil, which influences its permeability and strength. Furthermore, the specific gravity test provided insights into the density of the soil particles, which is crucial for calculating the weight-volume relationships in pavement design. The compaction test evaluated the soil's ability to be compacted to achieve the desired density and strength required for supporting the pavement loads. These tests collectively helped in characterizing the subgrade soil material and assessing its suitability for the pavement design. Based on the soil test results, recommendations were made for the design of the flexible pavement structure on the road linking Ugwuaji and Campus IMT Enugu. The findings of this study will be beneficial for engineers and road designers involved in infrastructure development projects. By understanding the soil properties of the subgrade material, appropriate design considerations can be made to ensure the durability and performance of the pavement structure. Overall, this research project highlights the importance of conducting a thorough soil investigation and testing process for road construction projects. By analyzing the soil properties and making informed design decisions, the longevity and effectiveness of the pavement structure can be enhanced. The findings of this study contribute to the field of geotechnical engineering and pavement design, providing valuable insights for sustainable infrastructure development.

Project Overview

COLLECTION OF SAMPLES AND LABORATORY TESTING PROGRAMThe test carried out in this project was on distributed soil sample.This implies collecting soil samples that are disfigured their natural shape.Soil samples were collected on three (3) trial pit along Ugwuaji and Campus 111 IMT Enugu. A total of three (3) samples were collected from the trial pits (one from each pit) using pick are and spade. The samples were taken at 1.0m depth in each pit. The samples were put in polythene bags and labelled A, B, C. The samples were spread on the floor of the soil laboratory and stones removed for seven (7) days to allow for air drying.The laboratory testing program comprises mechanical analysis, compaction test and atterberg limit tests, and the California bearing ratio (CBR) test.The objectives of the laboratory testing program were 1. To obtain a general information regarding the nature of the soil and their variation with depth throughout the length of the road under consideration.2. To obtain information regarding the strength characteristics of the soil.3. To obtain information which will enable engineers to group soils according to their appearances of the purposes of complying different soils.