Composite Stabilization and Model Prediction of Geotechnical Parameters of Lateritic Soils within the Coastal Plains of Akwa Ibom State, Nigeria | Chapter 05 | Novel Perspectives of Engineering Research Vol. 1

 The addition of two or more modifiers to lateritic soil, such as river sand and inorganic chemicals like cement, is known as composite soil stabilisation. This parameter affects the behaviour of the soil structure in two ways. The inorganic chemical increases chemical bonding and reduces permeability, while river sand offers volume stability. The soil structure improves in terms of strength, durability, and deformability. Composite soil stabilisation uses both physical and chemical treatments to improve the engineering properties of natural soil. Stabilization of poor soil is, in theory, a primary goal. It's about figuring out the most efficient and cost-effective way to increase the qualities of a relatively weak soil so that it can sustain any applied or shearing pressures. The major goal of this study is to look at the changes in the particle system distribution of coastal lateritic soil, as well as the stress response to imposed mechanical systems and contact behaviour when various stabilisers are applied. Soil treatment is most commonly used to improve shear strength and loading capacity, as well as stability and settlement control.

In all cases, calcium is the most critical component for soil stabilisation. In addition to reducing plasticity, Portland cement improves strength and durability due to its inherent nature of manufacturing strength – developing hydration products. As a result, the effectiveness of stabilisation is determined by the number of exchangeable ions positions – mineralogical composition, which is related to liquid limit, and the amount of liberated calcium ions from cement [percent of cement, percent of compaction, and curing time], which influences durability [bonding effect] and unconfined compressive strength [bearing capacity]. The dilatant nature of the lateritic soil formation in the area under investigation is prominent. Appropriate [composite] treatment is required before this material may be used in construction. Furthermore, the use of stone as a design element by practitioners has reached frightening proportions. This has pushed up the construction costs to an all-time high. This study will look into the cause of the dilatant laterization and test viable but cost-effective treatment [stabilisation] options to keep the expense of adapting this material for use in engineering and building operations to a bare minimum. It is critical because it will provide in-depth information of some engineering features of lateritic soils in Akwa Ibom State's coastal plains.

Author(S) Details

Essien Udo
Department of Civil Engineering, University of Uyo, Nigeria.

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