Statistical variability of the correlation plasticity index versus liquid limit for smectite and kaolinite

Spagnoli, Giovanni; Sridharan, A.; Oreste, Pierpaolo; Bellato, Diego; Matteo, Lucio Di

doi:10.1016/j.clay.2018.02.001

Cited by 28 publications

(11 citation statements)

References 77 publications

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“…Therefore, the geotechnical properties can be utilized to approximate the mineral composition of heaving soils. These findings are in line with the outcomes of the investigation conducted by [4]. Nevertheless, the study did not consider the non-clay mineral.…”

Section: Introductionsupporting

confidence: 85%

“…Another research work conducted by [3] revealed that the specific gravity is an important soil parameter related to the mineralogy and chemical composition of the soil. Reference [4] examined the statistical variability of the correlations between liquid limit and plasticity index of kaolinite and smectite, specimens of smectite and kaolinite that have been plotted and compared to one another. The results show that the relationship between the Atterberg limits is influenced by the clay mineralogy.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of the Mineral Composition of Heaving Soils Using Geotechnical Properties

Fondjo¹,

Theron²

2020

cea

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The behaviour of heaving soils is generally governed by the matric suction. Nonetheless, the mineralogical characteristics influence the geotechnical behaviour. X-ray diffraction is a common technique used to determine the mineral composition. This equipment is costly and the process time-consuming. The objective of this research is to develop predictive mathematical models to determine the predominant minerals in heaving soils. Soil samples are collected from identified areas across Free State province by digging at 50 cm depth from the ground surface. Geotechnical lab studies such as particle size distribution, Atterberg limits, specific gravity, free swell ratio, free swell index, linear shrinkage, and X-ray diffraction are performed to evaluate soil properties. A stepwise analysis is conducted to determine the response of each type of mineral to soil properties, and select the best subsets. Moreover, the influence of soil minerals on soil properties is achieved by investigating the correlation between the relevant soil properties and each mineral. Multivariate regression is performed utilizing MINITAB 18 program to develop mathematical predictive models. These equations are assessed base on correlation coefficient, probability value (P-value), and standard residual pattern analysis. The predominant minerals can be assessed with acceptable accuracy utilizing the proposed semi-empirical models.

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Section: Introductionsupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Assessment of the Mineral Composition of Heaving Soils Using Geotechnical Properties

Fondjo¹,

Theron²

2020

cea

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“…The liquid limit was positively related to the amount of nucleus and influenced by the clay content (Stanchi, 2016). The plasticity index and liquid limit were in contplasticity due to the clay content (Spagnoli, 2018). The plasticity index was determined based on clay content (Maroto, 2018).…”

Section: Resultsmentioning

confidence: 99%

Pedogenesis of Mt. Sumbing Volcanic Ash above The Alteration Clay Layer in The Formation of Landslide Susceptible Soils in Bompon Sub-Watershed

Wida

Maas

Sartohadi

2019

ipas

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Numerous researches on landslides have been carried out by many researches. However, studies on soil physical properties related to landslides potential in volcanic area are still rare. The objective of this study was to examine the effect of soil physical properties on landslides potential. To collect the soil sample, sampling area method was applied. The soil type used in this study was the residual soil. The values of clay liquid limit, plasticity limit, plasticity index, water content, COLE index were used to measure the physical properties of the soil. Organic material was used as the supporting data. The results showed that the soil in the command area showed high value of clay which exceeded 50%. Such high level conditions in each profile affect the liquid limit; plasticity limit, plasticity index, water content, COLE index and organic material. Based on the results, it can be concluded that residual soils with significantly high clay values illustrated the risk of landslide fields formation in Bompon sub-watershed. The clay soil layer was the controlled factor of soil movement.

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“…As a matter of fact, mineralogy has a strong influence on soil plasticity, e.g. [26] [27] [28] [29] [30]. Four clays have been selected for the laboratory tests.…”

Section: Methodsmentioning

confidence: 99%

Assessing the clogging potential of clay/additivemixtures by cone pull‐out tests

Spagnoli¹,

Feinendegen

Ziegler

2019

Geomechanics and Tunnelling

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Clogging can be a massive problem during the mechanized excavation of tunnels. Soil conditioning with foams and/or polymers is normally used in these cases to decrease the adverse effect of clogging. In a research project the cone pull‐out test was used to assess the variation of adherence for four sticky clays with four commercial additives. Results show that the additives have also an impact on the basic mechanical properties of the clays such as liquid limit, plasticity index and shrinkage limit. The tests were performed on the one hand by spraying the additives on the metal surface of the cone and on the other hand by directly mixing them to the clays to reach the critical consistency index (i.e. where the maximum adherence with water was observed). Sprayed cone tests show for two clays a decrease in adherence. However, by directly mixing the additives to the clay, adherence considerably decreases, except for one kaolinitic clay. The results can be useful to select suitable additives or to develop new ones considering the geotechnical and mineralogical properties of the excavated clays.

show abstract

Statistical variability of the correlation plasticity index versus liquid limit for smectite and kaolinite

Cited by 28 publications

References 77 publications

Assessment of the Mineral Composition of Heaving Soils Using Geotechnical Properties

Assessment of the Mineral Composition of Heaving Soils Using Geotechnical Properties

Pedogenesis of Mt. Sumbing Volcanic Ash above The Alteration Clay Layer in The Formation of Landslide Susceptible Soils in Bompon Sub-Watershed

Assessing the clogging potential of clay/additivemixtures by cone pull‐out tests

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