Physico-Chemical Properties of Lateritic Soils in Ado-Ekiti, South Western Nigeria
Journal Title: Universal Journal of Environmental Research and Technology - Year 2018, Vol 7, Issue 1
Abstract
The physico-chemical properties of lateritic soils in Ado Ekiti Area of Ekiti State, Nigeria were evaluated. The study area was divided into Six Zones: A total of 30 samples were collected with five samples per zone. Laboratory tests such as: X-ray fluorescence (X-RF) and X-ray diffraction (X-RD) in other to evaluate their chemical composition. Natural Moisture Content (NMC) , Specific gravity, Grain size analysis, Consistency tests ,were carried out on each of the samples the purpose of which to study their physical properties. These tests were carried out in accordance with (BS1377:1990). The laboratory results indicated that the NMC ranged from 1.1 to 18.7%; specific gravity ranged from 2.23 to 2.79 ; the liquid limit ranged from 25 to 65%, plastic limit ranged from 17 to 43%, plasticity index ranged from 10 to 30%; linear shrinkage ranged from 3.6 to 15.5%.The soils were classified as clay of low compressibility (CL) for zones 1 and 2, clay of high compressibility (CH) for Zone 3 samples 1,2 and 5 and Zone 4 sample 2,Zone 5 samples 2 and 5 and Zone 6 samples 1and 2 according to (USCS,1986) and A-2-4, A-2-6, A-6, and A-7-5. From the foregoing, the soils classified some as low plasticity, sandy gravelly clay, clayey soils and others as medium compressibility soils. Based on Sesquioxide (S-S) ratio the soils grouped into True laterite and lateritics soils which indicate poor laterisation for zones 1 and 2 while other zones have undergone considerable degree of laterisation. Major clay mineral found were: illite, heamatite, and to lesser amount of halloysite. It was concluded that the research work has provided information for all construction personnel within the study area. The soils are not expected to perform very well as concrete aggregates since they contain high amounts of SiO2 and Fe2O3.since the oxides have deleterious effects on construction materials, particularly concrete aggregate.
Authors and Affiliations
Osuji O. S and Akinwamide J. T
Keywords
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