A theoretical retention model for unsaturated uniform soils

Monnet, Jacques; Mahmutovic, Dino; Boutonnier, Luc; Taïbi, Saïd

doi:10.1080/19648189.2016.1277376

Cited by 3 publications

(8 citation statements)

References 10 publications

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“…For a soil composed of uniform particle size, the void ratio may vary depending on the compaction energy. Monnet et al [12] show that for the four arrangements, the void ratio is independent of the particle radius, but depends only on the arrangement of the particles. The particle radius influences only the size of the REV (Representative Elemental Volume).…”

Section: Arrangement Of Soil Particles For Uniform Particle Sizementioning

confidence: 99%

“…Under the action of a normal force F N (5) on the plane of contact, the two balls deform elastically according to the theory [11]. The details of these calculations are in [12].…”

Section: Deformation Of Spherical Particles and Meniscus Volume: Domamentioning

confidence: 99%

“…The contact between the particles and the water has a wetting angle of θ c which varies in case of drainage or humidification [6]. The meniscus volume calculation for various void ratio was done [12].…”

Section: Analytical Calculation Of Meniscus Volumes With a Wetting Anmentioning

confidence: 99%

“…The theoretical calculation of the meniscus can only be carried out when menisci are independent. When coalescence occurs, the model assumes that the suction remains unchanged according to [12].…”

Section: Arrangement Of Soil Particles For Uniform Particle Sizementioning

confidence: 99%

“…The knowledge of the water content or saturation allows to calculate the total volume of water in the REV (6). The knowledge of the number of contacts in the REV and the number of menisci allows to calculate the volume (8) of a single meniscus [12]. The volume of the meniscus depends on the radius of the meniscus, the radius of the particle, and the suction (4).…”

Section: Theoretical Retention Curve For Uniform Soil: Domain D1mentioning

confidence: 99%

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Theoretical modelling of retention curve for Livet-Gavet loam

Monnet¹,

Boutonnier

Taïbi

et al. 2020

E3S Web Conf.

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Different approaches have been used for modeling retention curves. The experimental correlation was first proposed [1-3]. The physical modelling of unsaturated soils is used for this study. The shape of the retention curve is a consequence of physical assumptions. The paper presents a theoretical model based on elastic spherical particle arrangement. Firstly, a uniform model is presented with a single diameter of soil particle. The second step extends the use of the model to graded soils. The model uses only physical parameters easy to measure. The model is compared with the experimental retention curve of two different samples, the Livet-Gavet loam (1.61m-3mm) as paste and the Gavet sandy loam compacted with 85 falls per layer of Proctor weight. It shows its ability to model the experimental curves. It is of great interest for engineers as it uses only physical parameters. It gives a direct determination of the retention curve along the wetting path and along the drying path. It shows also the importance of adsorbed water to describe the retention curve.

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Section: Arrangement Of Soil Particles For Uniform Particle Sizementioning

confidence: 99%

“…Under the action of a normal force F N (5) on the plane of contact, the two balls deform elastically according to the theory [11]. The details of these calculations are in [12].…”

Section: Deformation Of Spherical Particles and Meniscus Volume: Domamentioning

confidence: 99%

Section: Analytical Calculation Of Meniscus Volumes With a Wetting Anmentioning

confidence: 99%

Section: Arrangement Of Soil Particles For Uniform Particle Sizementioning

confidence: 99%

Section: Theoretical Retention Curve For Uniform Soil: Domain D1mentioning

confidence: 99%

See 3 more Smart Citations

Theoretical modelling of retention curve for Livet-Gavet loam

Monnet¹,

Boutonnier

Taïbi

et al. 2020

E3S Web Conf.

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Live load effect in soil-steel flexible culvert: role of apparent cohesion of backfill

Sobótka

Łydżba

2019

European Journal of Environmental and Civil Engineering

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Pore‐scale view of microbial turnover: Combining ¹⁴C imaging, μCT and zymography after adding soluble carbon to soil pores of specific sizes

Kravchenko

Guber

Gunina

et al. 2020

European J Soil Science

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The location of microorganisms and substrates within soil pore networks plays a crucial role in organic carbon (C) processing, and its microbial utilization and turnover, and has direct consequences for C and nutrient cycling. An optimal approach to quantify responses to new C inputs from microorganisms residing in specific pores is the addition of new C to pores of target sizes in undisturbed soil cores. We used the matric potential approach to add 14C‐labelled glucose to small (< 40 μm, root free) or large (60–180 μm, potentially inhabited by roots) pores of undisturbed soil cores. Localization of glucose‐derived C via 14C imaging was related to pore size distributions and connectivity, characterized via X‐ray computed microtomography (μCT), and to β‐glucosidase activity, characterized via zymography. After 2‐week incubations, 1.3 times more glucose was mineralized (14CO2) when it was added to the large pores; however, more 14C remained in microbial biomass when glucose was added to the small pores. Consequently, although utilizing the same amounts of easily available C, the microorganisms localized in the large pores had faster turnover compared to microorganisms in small pores. Stronger associations between β‐glucosidase activity and glucose‐derived C were observed when glucose was added to the large pores. We conclude that (a) the matric potential approach allows placing, albeit not exactly, of soluble substrates into pores of target diameter range, and (b) microorganisms localized in large pores respond to new C inputs with faster turnover, greater growth and more intensive enzyme production compared to those inhabiting the small pores.

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A theoretical retention model for unsaturated uniform soils

Cited by 3 publications

References 10 publications

Theoretical modelling of retention curve for Livet-Gavet loam

Theoretical modelling of retention curve for Livet-Gavet loam

Live load effect in soil-steel flexible culvert: role of apparent cohesion of backfill

Pore‐scale view of microbial turnover: Combining ¹⁴C imaging, μCT and zymography after adding soluble carbon to soil pores of specific sizes

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A theoretical retention model for unsaturated uniform soils

Cited by 3 publications

References 10 publications

Theoretical modelling of retention curve for Livet-Gavet loam

Theoretical modelling of retention curve for Livet-Gavet loam

Live load effect in soil-steel flexible culvert: role of apparent cohesion of backfill

Pore‐scale view of microbial turnover: Combining 14C imaging, μCT and zymography after adding soluble carbon to soil pores of specific sizes

Contact Info

Product

Resources

About

Pore‐scale view of microbial turnover: Combining ¹⁴C imaging, μCT and zymography after adding soluble carbon to soil pores of specific sizes