Swelling Stress and Suction Correlation of Compacted, Heaving Soils

Fondjo, Armand Augustin; Dzogbewu, Thywill Cephas

doi:10.13189/cea.2020.080434

Cited by 5 publications

(5 citation statements)

References 11 publications

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“…Water molecules are strongly attracted to clay mineral surfaces and can distribute itself evenly throughout the water. The predominant clay mineral which has high swelling stress and soil suction can hold the water together [25]. Furthermore, it is believed that this housing area was a dumping site originally from a small stream before constructing this house.…”

Section: Results Of Resistivity Test and Soil Profilingmentioning

confidence: 99%

Cracks Monitoring and Resistivity Test for a Double-Storey House due to Cavity in the Soil

Shamsudin¹,

Hamid²,

Sidek³

et al. 2021

cea

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Section: Results Of Resistivity Test and Soil Profilingmentioning

confidence: 99%

Cracks Monitoring and Resistivity Test for a Double-Storey House due to Cavity in the Soil

Shamsudin¹,

Hamid²,

Sidek³

et al. 2021

cea

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“…The outcome is in line with the studies performed by [20,21] reported the increment of the SS when the dry density increases. Reference [103] investigated the correlation between SS and suction of compacted expansive soils. The outcomes reveal that at W OP , the SS values range from 177kPa to 326kPa.…”

Section: Compactionmentioning

confidence: 99%

Stabilization of Expansive Soils Using Mechanical and Chemical Methods: A Comprehensive Review

Fondjo¹,

Theron²,

Ray³

2021

cea

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The presence of expansive soils on construction sites is problematic in geotechnical engineering. The swell-shrink behaviour makes these soils not suitable to be used in their natural state. The expansive soil damages cause financial loss yearly more than floods, hurricanes, tornadoes, and earthquakes combined. Moreover, the cost of cut to spoil of expansive soils during construction projects has continued to rise because of the high cost of earthworks, haulage, and the increasing scarcity of spoil areas because of the built environment. Nonetheless, a proper stabilization technique can significantly enhance the expansive soil's properties. The research project attempts to review, report the limits and merits of mechanical and chemical methods utilized to stabilize expansive soils in line with their efficiency, environmental concerns, and cost-effectiveness. A review of mechanical and chemical treatment techniques is conducted in this regard. Ultimately, each stabilization method exhibits its merits and limitations. The lack of standards for the treatment of swelling soils is a significant problem in engineering practice. Specialists in the domain of soil treatment must work together to obtain an optimized stabilization approach and protocol. Moreover, engineers should perform a geoenvironmental assessment appropriate for chemical stabilization methods and additives utilized. This research work contributes as a guideline in the selection and application of chemical and mechanical stabilization methods.

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“…it was considered desirable to perform multilinear regression analysis based on each of the measured soil properties to predict the dependent variable and validate models with an independent dataset. Regression analysis is applied to assess the relationship between soil properties and swelling stress particularly for expansive soils [38,39]. The experimental data in Table 3 were used to develop the models, due to the influence of FSI, GMC, P.I., and matric suction on swelling stress.…”

Section: Development Of Multi-regression Predictive Models For Swelling Stressmentioning

confidence: 99%

Validation of Semi-empirical Models for the Prediction of Swelling Stress for Compacted Unsaturated Expansive Soils

Ikechukwu¹,

Onyeka²

2021

cea

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Unsaturated swelling soil behaviour is governed by the matric suction, thus the predetermination of swelling stress for expansive unsaturated soil requires rigorous procedures. However, some swelling stress equations assume full saturation of the soil, which leads to the over-design of infrastructure. This study focused on the validation of predictive swelling stress models that correlate suction with other soil properties. Three models were developed, and independent data were used for the validation of the developed models. The predicted swelling stress values were compared to the values predicted by the randomly selected predictive models from the literature. Series of initial studies include the determination of basic soil characterization and swelling stress along with soil mineralogical compositions were conducted to determine their geotechnical properties with their corresponding degree of expansiveness. The replicated expansive soils were also studied for suction, using filter paper techniques to obtain the soil's unsaturated parameters. Based on the obtained experimental results, three models were developed using a mathematical software package (NCSS11). Independent data obtained from a group of final year students working on the swelling stress response of expansive unsaturated soils at the geotechnical engineering Laboratory from the University of Johannesburg were used for the validation. The developed models showed good agreement with the independent data, having a coefficient of determination (R 2 ) of 0.858, 0.931, and 0.890 for Eq. 4, 5, and 6, respectively. Compared to models selected from literature, which recorded R 2 values of 0.796 and 0.636 with an average variance of 0.097 and 0.257 respectively. The correlation variables showed that the degree of expansion represented by swelling stress demonstrated a proportionality with the moisture capacity along the drying and wetting path of the suction curves. Results suggest that the developed models can reasonably predict the swelling stress of compacted expansive soils at high suction values.

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Swelling Stress and Suction Correlation of Compacted, Heaving Soils

Cited by 5 publications

References 11 publications

Cracks Monitoring and Resistivity Test for a Double-Storey House due to Cavity in the Soil

Cracks Monitoring and Resistivity Test for a Double-Storey House due to Cavity in the Soil

Stabilization of Expansive Soils Using Mechanical and Chemical Methods: A Comprehensive Review

Validation of Semi-empirical Models for the Prediction of Swelling Stress for Compacted Unsaturated Expansive Soils

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