The Water Retention Characteristics of Compacted Clays

Catană, M.; Vanapalli, Sai K.; Garga, Vinod K.

doi:10.1061/40802(189)111

Cited by 11 publications

(26 citation statements)

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“…The one-point method approach used in this study is to certain extent userdependent due to the reason that the selected ψ p and ψ of the estimated one point may vary based on the user. However, Catana et al (2006) studies have shown that the SWCC estimated using this method will be very close to each other irrespective of the user's criteria in the selection of the ψ p and ψ. Figures 2 and 3 show that the SWCC of the two soils have been reasonably well estimated using the Catana et al (2006) one-point method.…”

Section: Estimation Of the Swccmentioning

confidence: 90%

“…Due to this reason, in recent years, several investigators have suggested simple techniques to quickly estimate the SWCC using only one point measurement of the moisture -soil suction relationship (Vanapalli and Catana 2005, Catana et al 2006, Chin et al 2010). The one-point method proposed by Catana et al (2006) is used to estimate the gravimetric water content based SWCC (i.e., w -ψ relationships) of fine-grained soils in the present study.…”

Section: A New Approach For Estimating the M R -ψ Relationshipmentioning

confidence: 99%

“…Graphical illustration of the Catana et al (2006) one-point method is shown in Figure 1. Four steps are involved in this one-point method.…”

Section: A New Approach For Estimating the M R -ψ Relationshipmentioning

confidence: 99%

“…In step iv), the measured and estimated points of the SWCC, along with the w value at saturation condition (w SAT ), are substituted into the equation proposed by Brutsaert (1966) (Equation 8) to back calculate the model parameters a b and n b . More details of the one-point method for estimating the SWCC are available in Catana et al (2006). …”

Section: A New Approach For Estimating the M R -ψ Relationshipmentioning

confidence: 99%

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A New Approach for Estimating the Influence of Soil Suction on the Resilient Modulus of Pavement Subgrade Soils

Han¹,

Mihambanou²,

Vanapalli³

2015

Airfield and Highway Pavements 2015

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A new approach is proposed in this paper for estimating the resilient modulus (M R ) of pavement subgrade soils taking account of the influence of the soil suction (ψ). This approach includes two steps: step (i) estimating the soil-water characteristic curve (SWCC) using one-point method, and step (ii) predicting the M R -ψ relationships using a simple model and the estimated SWCC from step (i). Estimations of the SWCC and the M R for two different subgrade soils using (i) the proposed approach, and (ii) the widely used mechanistic-empirical pavement design guide (MEPDG) approach are compared with the experimental measurements. The comparison results suggest that the proposed new approach provides reliable estimations of both the SWCC and the M R -ψ relationships. The proposed approach in this paper is relatively simple and is promising for use in the design of pavements.

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Section: Estimation Of the Swccmentioning

confidence: 90%

Section: A New Approach For Estimating the M R -ψ Relationshipmentioning

confidence: 99%

“…Graphical illustration of the Catana et al (2006) one-point method is shown in Figure 1. Four steps are involved in this one-point method.…”

Section: A New Approach For Estimating the M R -ψ Relationshipmentioning

confidence: 99%

Section: A New Approach For Estimating the M R -ψ Relationshipmentioning

confidence: 99%

See 2 more Smart Citations

A New Approach for Estimating the Influence of Soil Suction on the Resilient Modulus of Pavement Subgrade Soils

Han¹,

Mihambanou²,

Vanapalli³

2015

Airfield and Highway Pavements 2015

View full text Add to dashboard Cite

show abstract

“…Vanapalli and Catana (2005) presented a method to estimate the SWCC of coarse-grained soils using one SWCC measurement point in the suction range of 0.1 to 10 kPa and basic soil parameters (dominant grain size diameter de, grain size at 10% passing D10, grain size at 60% passing D60, and void ratio e). For fine-grained soils, the Catana et al (2006) proposed to estimate the SWCC using one SWCC measurement point in the range of 50-500 kPa and suction capacity, C, which is correlated with the product of liquid limit and clay fraction. Houston et al (2006) proposes a one-point method to estimate SWCC of non-plastic soils using grain sizes at 10, 20, 30, 60 and 90% passing (D10, D20, D30, D60, and D90, respectively) and fines content less than 200 µm (P200) with one SWCC measurement point.…”

Section: One-point Methodsmentioning

confidence: 99%

Soil-water characteristic curves - Determination, estimation and application

Leong

2019

JGS Special Publication

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The soil-water characteristic curve (SWCC) is a relationship between water content in a soil and suction. The SWCC was first plotted by Edgar Buckingham, a soil physicist, in 1907 for six soils ranging in texture from sand to clay. It was adopted for use in unsaturated soil mechanics by the geotechnical engineering community. The SWCC is now almost treated as the index property of unsaturated soils. It has been used as a proxy for permeability and shear strength of unsaturated soil. Most soils have a sigmoidal SWCC, otherwise known as a unimodal SWCC as opposed to a bimodal SWCC which has been found for some soils. Although determining the SWCC is easier than determining permeability or shear strength for unsaturated soil, the test is still time-consuming and it is not easy to determine the entire SWCC. Incomplete or insufficient SWCC data may lead to an incorrect SWCC and hence inaccurate determination of permeability and shear strength. Progress has been made to expedite the experimental determination of SWCC as well as estimating the SWCC from basic soil properties using pedotransfer functions. In addition, SWCC has been represented using volumetric water content, gravimetric water content or degree of saturation. Different representations may have dire consequences on its application. Determining the SWCC using volumetric water content or degree of saturation presents challenges in estimating the instantaneous volume during the experiment. In this paper, the current state-of-the-art in determining, representing and estimating SWCC and its applications are described and critically examined.

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The effect of solid‐phase composition on the drying behavior of Markermeer sediment

Barciela-Rial

Paassen

Griffioen

et al. 2020

Vadose Zone Journal

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We studied the drying behavior of slurries of Markermeer sediments in the Netherlands having different solid compositions. Natural processes such as sand-mud segregation and oxidation of organic matter were mimicked to analyze the effect of changes in sediment composition. Evaporation experiments were performed with soft slurry samples using the Hyprop setup. Soil water retention curves (SWRCs) and hydraulic conductivity curves (HCCs) were determined as a function of the water ratio (WR, defined as volume of water/volume of solids). The sediment remained close to saturation until the end of the experiments. The Atterberg limits reduced significantly after sediment treatment involving drying at 50 • C, rewetting, and chemical oxidation. Furthermore, the oxidized sediment lost capacity to retain water. The SWRCs of sandy and oxidized clays were steeper, and fine-textured sediments showed large water ratios. At low matric suctions, the water retention capacity of the upper sediment samples containing more labile organic matter was larger than that of the sediment underneath. Clear correlations were found between van Genuchten parameters and the degree of degradation of the organic matter. The hydraulic conductivity of finetextured samples with less labile organics was larger. The results give insight into the drying behavior of Markermeer sediment, currently used to build wetlands.

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The Water Retention Characteristics of Compacted Clays

Cited by 11 publications

References 0 publications

A New Approach for Estimating the Influence of Soil Suction on the Resilient Modulus of Pavement Subgrade Soils

A New Approach for Estimating the Influence of Soil Suction on the Resilient Modulus of Pavement Subgrade Soils

Soil-water characteristic curves - Determination, estimation and application

The effect of solid‐phase composition on the drying behavior of Markermeer sediment

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