Bachelor of Science in Civil and Environmental Engineering

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Investigating the use of River Sand in Stabilising Expansive Soils Case Study: Moroto-Nadunget Pavement Section
(2024-04-08) Ambrose Mwine
The research carried out was aimed at improving the properties of expansive soils while using river sand for use in the subgrade soil layer. The research was guided by three specific objectives which included determining the engineering properties of the neat soils, determining the engineering properties of river sand and lastly determining the engineering properties of the river sand stabilized mix. The case study of the research was Moroto-Nadunget road section located in Moroto District and the river sand was bought along the banks of river Kangole from the locals. Furthermore, the study discussed about the sampling and preparation of the materials used. Different laboratory tests were carried out at Sterling labaratory while following the specific objectives stated in reference with the required standards of British Standards, General Specification MOW and others. Lastly different tests of CBR, MDD, PI were carried out on the stabilized river sand mix and at optimum river sand content of 20%, the mix had an MDD value of 1.889gm/cm3, CBR value of 33.8%, PI value of 16.1% which all lied in the required range for a subgrade soil layer. Hence making river sand a good mechanical stabilizer for expansive soils. For this research, some conclusions were drawn and as well recommendations for further research were given.