Determination of the Compression Index of Reconstituted Clays Using Intrinsic Concept and Normalized Void Ratio

Habibbeygi, Farzad; Nikraz, Hamid; Verheyde, F.

doi:10.21660/2017.39.98271

Cited by 11 publications

(5 citation statements)

References 19 publications

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“…The liquid limit ( ) and plasticity limit ( ) of the black clay are measured to be 82% and 35% respectively. The in-situ water content of the samples were measured immediately after collection and was 40% [24]. The laboratory tests also state that the shear strength of the black clay is highly dependent on the initial water content [25].…”

Section: Methodsmentioning

confidence: 99%

Compression Behaviour of Highly Expansive Clays Stabilised With a Green Stabiliser of Magnesium Chloride

Habibbeygi¹

2018

GEOMATE

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ABSTRACT:The presence of expansive clays underlying infrastructures has been responsible for damages to the structures in many cases all over the world when the moisture content of these problematic soils changes. One of the effective methods to alleviate the swell potential of expansive clays is to stabilize them with an additive such as lime, cement, resins, chemicals and so on. In this study, the use of magnesium chloride (MgCl 2 ) as a green stabilizer to improve the geotechnical properties of the treated clays has been investigated by conducting several laboratory tests. Currently, MgCl 2 is mainly used as an anti-icing materials in pavement industry; however, it has been recently received more attention as a stabilizer for clayey soils. Firstly, the effect of MgCl 2 on the consistency limits of the treated clayey soils was studied in this study. Next, the swell pressure and free swell strain of the treated samples were measured and the results compared with one of the untreated samples. Overall, the results state that even a small dose of MgCl 2 can be used as a stabilizer for expansive clays to improve the geotechnical properties considerably and to mitigate their swell potential effectively.

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Section: Methodsmentioning

confidence: 99%

Compression Behaviour of Highly Expansive Clays Stabilised With a Green Stabiliser of Magnesium Chloride

Habibbeygi¹

2018

GEOMATE

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“…The compression index (= 0.434•λ) is usually obtained from the consolidation test, which is costly and time-consuming (Habibbeygi et al, 2017). Many empirical formulations of the compression index with parameters such as liquid limit, void ratio, and water content have been proposed.…”

Section: Initial Void Ratio Before Shearing-dependent Slope Of Normal...mentioning

confidence: 99%

A modified subloading Cam-clay model for granular soils subjected to suffusion

Wang

Takahashi

2021

Geomechanics and Geoengineering

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Suffusion, one of the modes of internal erosion, occurs when fine particles are detached under hydraulic force.More fine particles are washed out with the void growth, which subsequently causes the failure of earthworks. At present, constitutive models considering suffusion are mostly established through DEM simulations and constitutive models that can capture the main features of eroded soils are quite limited. This study aims to establish constitutive equations to model the mechanical behaviour of soils subjected to suffusion by using drained triaxial experimental data. The modified subloading Cam-clay model incorporated with the normal yield surface for the eroded soil is proposed, which can express the variation of the normal yield surface with the loss of fine particles.The determination method of the erosion-related model parameters is also proposed. The erosion-related model parameters are estimated through empirical equations with curve-fitted parameters. Finally, the capability of this modified model is demonstrated through the comparisons with experimental results.

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“…These studies indicate variations in the comparison of the actual and predicted settlement magnitude and this is due to several factors, one of which is the inaccuracy of the consolidation parameters used in predicting the settlement. For example, a small amount of sample data is usually used in laboratory tests to obtain consolidation parameters based on economic reasons and time considerations, and this means the calculation is often carried out using empirical formulas and correlations [22], which are required to be selected appropriately following the soil conditions of the locations to reviewe. It means the factors affecting the variations include the different conditions and types of soil and the empirical formulations to obtain the parameters of the placement.…”

Section: Related Workmentioning

confidence: 99%

The Comparison of the Soft Clay Settlement Under an Embankment Load Using Field Instrumentation and Empirical Formulation

Wahyudi¹,

Lastiasih²,

Satrya³

et al. 2021

GEOMATE

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Settlement of embankments on soft soils is a significant problem in geotechnical engineering to maintain pavements, buildings, and other facilities on them. The problem that often arises is not being able to predict the magnitude of consolidation compression accurately, this occurs due to uncertainty in field conditions, laboratory testing, and data interpretation, as well as assumptions made in the development of 1-D consolidation theory. Based on the causes of inaccurate settlements predictions, it is necessary to carry out research on a better method for predicting embankment's settlement on soft soil. To obtain the correct method, a study was conducted by comparing and examining the consolidation settlement of embankments built on soft soil using theoretical calculations and field measurement results. The process involved monitoring the settlements using 25 plate measurement data in embankment preloading for housing and building construction over the very soft clay. The results showed the compression parameter, especially Cc, is very influential on the compression ratio, and the Cc value based on the empirical formula of Bowles (1989) turned out to be the most suitable for the actual compression results in the field with a compression ratio between 0.6-1.1 and confidence of level 90%.

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Determination of the Compression Index of Reconstituted Clays Using Intrinsic Concept and Normalized Void Ratio

Cited by 11 publications

References 19 publications

Compression Behaviour of Highly Expansive Clays Stabilised With a Green Stabiliser of Magnesium Chloride

Compression Behaviour of Highly Expansive Clays Stabilised With a Green Stabiliser of Magnesium Chloride

A modified subloading Cam-clay model for granular soils subjected to suffusion

The Comparison of the Soft Clay Settlement Under an Embankment Load Using Field Instrumentation and Empirical Formulation

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