2013
DOI: 10.2478/v10247-012-0091-x
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Compressive response of some agricultural soils influenced by the mineralogy and moisture

Abstract: A b s t r a c t. This study aimed to investigate the mineralogy, moisture retention, and the compressive response of two agricultural soils from South West Nigeria. Undisturbed soil cores at the A and B horizons were collected and used in chemical and hydrophysical characterization and confined compression test. X-ray diffractograms of oriented fine clay fractions were also obtained. Our results indicate the prevalence of kaolinite minerals relating to the weathering process in these tropical soils. Moisture r… Show more

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Cited by 12 publications
(13 citation statements)
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“…The dominance of low activity clay mineral (kaolinite) is known to promote a face-to-face arrangement of the kaolinite plates, minimizing shrinkage and swelling (Miranda-Trevino and Coles, 2003). However, the possible presence of hydroxyl-interlayered vermiculite (HIV) as wedges between the kaolinite plates (Pai et al, 2004) may expand the available adsorption sites between the mineral layers, thereby enhancing water retention (Ajayi et al, 2013). This may explain why the effect of the kaolinite was very similar to that of biochar at the various rates of amendments.…”
Section: Discussionmentioning
confidence: 99%
“…The dominance of low activity clay mineral (kaolinite) is known to promote a face-to-face arrangement of the kaolinite plates, minimizing shrinkage and swelling (Miranda-Trevino and Coles, 2003). However, the possible presence of hydroxyl-interlayered vermiculite (HIV) as wedges between the kaolinite plates (Pai et al, 2004) may expand the available adsorption sites between the mineral layers, thereby enhancing water retention (Ajayi et al, 2013). This may explain why the effect of the kaolinite was very similar to that of biochar at the various rates of amendments.…”
Section: Discussionmentioning
confidence: 99%
“…A utilização de modelos de CSCS para predizer os efeitos do tráfego sobre a estrutura do solo preconiza a utilização da pressão de pré-consolidação (σ p ) (Kamimura et al, 2012;Ajayi et al, 2013;Martins et al, 2013;Severiano et al, 2013). A pressão de pré-consolidação é uma propriedade mecânica do solo obtida em laboratório e é indicadora da pressão máxima que pode ser aplicada ao solo de maneira a não compactar adicionalmente o solo (Dias Júnior e Pierce, 1996).…”
Section: Introductionunclassified
“…The curves simulated cover a wide range of soil compression curves, such as those obtained for soil samples in compression tests under different soil bulk densities, textures, and moisture contents (Arvidsson and Keller, 2004;Imhoff et al, 2004;Gregory et al, 2006;Cavalieri et al, 2008;Ajayi et al, 2009;Saffih-Hdadi et al, 2009;Ajayi et al, 2013;An et al, 2015).…”
Section: Simulated Soil Compression Curvesmentioning
confidence: 99%
“…The slopes of the VCL and SL were generated on the log 10 scale of the applied loads. The original data set and the boundary of the initial void ratio and the values of C c and C s used in simulations were based on data from Ajayi et al (2009), Keller et al (2011), Ajayi et al (2013), and An et al (2015).…”
Section: Scenarios Of Simulationmentioning
confidence: 99%
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