Hydraulic conductivity of gravelly soils with various coarse particle contents subjected to freeze–thaw cycles

Lu, Yang; Liu, Sihong; Yong-gan, Zhang; Wang, Liujiang; Li, Zhuo

doi:10.1016/j.jhydrol.2021.126302

Cited by 38 publications

(12 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, the Ks values of the silt-gravel mixtures between 3.0 and 8.9 cm d -1 are classified as low (Ad-Hoc Ag Boden, 2005). Thus, the hydraulic conductivity in silt-and sand-gravel mixtures depends on the gravel content (Lu et al, 2021;Miller et al, 2014).…”

Section: Rv-weighted Swrc's Vs Measured Swrc'smentioning

confidence: 99%

“…For explanation, She et al (2006) have shown that 100 % gravel soils stepwise filled with sand (+5 wt%, +20 wt%, +50 wt%) are characterised by a decrease in Ks values, because the sand fills the gap between the stones. Conversely, gravel may form a contact skeleton and therefore a preferential flow domain (Beck-Broichsitter et al, 2022;Lu et al, 2021) while stepwise added to a sandy or silty soil. Thus, the Ks values increase as also shown by Shakoor andCook (1990), andChapuis (2004).…”

Section: Rv-weighted Swrc's Vs Measured Swrc'smentioning

confidence: 99%

“…Natural and anthropogenic soils are formed or modified by erosion of bedrock, decomposition of organic matter or human activity (Howard et al, 2017). Terrestrial and semiterrestrial soils as well as hydromorphic and sub-enhydrous soils except peat soils are normally characterised by a mixture of fine soil matrix and a coarse soil fraction (Bronick and Lal, 2005;Lu et al, 2021;Naseri et al, 2019;Rizvi et al, 2022). There is a wide range of stony and gravelly soils consisting of weathered calcareous or other material such as rendzinas, rankers or regosols and its horizon-specific gravel content as well as the spatial distribution varies from region to region (Beck-Broichsitter et al, 2022;Corti et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

“…The presence of gravel modifies the porosity, pore connectivity, pore size distribution, PSD, in the soil matrix as well as the soil matrix-gravel interfaces (Beck-Broichsitter et al, 2022;Chief et al, 2008;Lu et al, 2021), based on the way they were weathered (Naseri et al, 2019). Its connectivity depends on the layering and the size of stones and fragments, and even stones can have some porosity (Miller et al, 2014;Naseri et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of gravel content on soil water retention characteristics and thermal capacity of sandy and silty soils

Beck‐Broichsitter

Rizvi

Horn

et al. 2023

Journal of Hydrology and Hydromechanics

View full text Add to dashboard Cite

The presence of gravel in soils modifies the porosity, pore connectivity and pore size distribution in the soil matrix as well as the soil matrix-gravel interfaces. The aim of the present study is to investigate the effect of relative volume of gravel in samples with gravel mass fractions of 5,10, 20 wt% and varying bulk densities (1.3, 1.45, 1.55, 1.60, 1.65 g cm–3) on (i) total porosity, field capacity, plant available water holding capacity, (ii) pore size distribution and (iii) thermal capacity of repacked sandy and silty soils. The focus of the study was to determine if laboratory measured soil water retention curves considering (i), (ii), and (iii) can be predicted by a gravel-based weighting factor, Rv, considering comprehensive significance tests. The sand-gravel mixtures show a decrease in the volume fractions of macropores and wide cores pores with an increase in the gravel contents, while the silt-gravel mixtures show an opposite trend. The root mean square errors (RMSE) between measured and fitted volumetric water contents, θ, between 0.006 and 0.0352 and between 0.002 and 0.004 for Rv-weighted volumetric water contents indicate that the van Genuchten-based Peters-Durner-Iden (PDI) model is appropriate for fitting. The soil water retention curves with mass gravel contents of up to 10 wt% for silt and 20 wt% for sand can be well predicted by weighting factors (relative volume of rock fragments) in the range between 0.045 and 0.058 for silt, and between 0.112 and 0.119 for sand. The results also indicate a decrease in the Rv-weighted saturated, cvsat, and dry, cvdry, thermal capacity with an increase in the gravel contents for both soils. Further investigations are needed to examine if and whether measured sand- and silt-gravel mixtures with mass gravel contents below 10 % or rather 20 % can be predicted with a weighting factor.

show abstract

Section: Rv-weighted Swrc's Vs Measured Swrc'smentioning

confidence: 99%

Section: Rv-weighted Swrc's Vs Measured Swrc'smentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of gravel content on soil water retention characteristics and thermal capacity of sandy and silty soils

Beck‐Broichsitter

Rizvi

Horn

et al. 2023

Journal of Hydrology and Hydromechanics

View full text Add to dashboard Cite

show abstract

“…Regarding the kinetics of performance development, it is widely accepted that cementstabilized soils share the basic chemical mechanisms of dissolution and precipitation with cementitious materials, such as mortar and concrete [4,[18][19][20]. Knowledge [21] from cementitious materials has stated that after contact with water, the clinkers initially dissolve to form supersaturated aqueous phases and the hydrates subsequently precipitate from the solution.…”

Section: Introductionmentioning

confidence: 99%

An Investigation on Mineral Dissolution and Precipitation in Cement-Stabilized Soils: Thermodynamic Modeling and Experimental Analysis

Hua

et al. 2022

Applied Sciences

View full text Add to dashboard Cite

Thermodynamic modeling helps to reveal insights into the basic chemical kinetics of dissolution and precipitation in cementitious materials, but relevant applications to cement-stabilized soils have seldom been reported. Based on the thermodynamic database of Cemdata18 and the pore solution composition of cement-stabilized soils, this study formulated a specialized thermodynamic model, using essential thermodynamic constants for soil minerals that were calculated to ensure the model’s accuracy. Two commercial admixtures of alkaline activator and polynaphthalene sulfonate were selected for the different modification mechanisms and plain and modified cement-stabilized soils were prepared. Compressive strength was tested to determine the specimens for pore solution analysis and the influences of the admixture type and dose on dissolution and precipitation were investigated by modeling the ionic activity products and saturation indexes. An X-ray diffraction (XRD) analysis was performed to verify and complement the thermodynamic results. The major research findings were that (1) thermodynamic modeling can be reliably applied to cement-stabilized soils by providing the essential thermodynamic data and an appropriate product model, (2) the pozzolanic reaction is accelerated by increasing the OH− concentration in the pore solution, while the cement hydration is highly dependent on the dissolution of Ca(OH)2 and the relevant complexes and (3) the dissolution equilibrium of Ca(OH)2 is directly affected by the alkaline activator dissolution and is indirectly affected by the polynaphthalene sulfonate adsorption of the reactants.

show abstract

Freeze–thaw process of backfill in a dam and its driving factors in seasonally frozen soil area

Ren

Yu²,

Pan³

et al. 2022

Bull Eng Geol Environ

View full text Add to dashboard Cite

Hydraulic conductivity of gravelly soils with various coarse particle contents subjected to freeze–thaw cycles

Cited by 38 publications

References 58 publications

Effect of gravel content on soil water retention characteristics and thermal capacity of sandy and silty soils

Effect of gravel content on soil water retention characteristics and thermal capacity of sandy and silty soils

An Investigation on Mineral Dissolution and Precipitation in Cement-Stabilized Soils: Thermodynamic Modeling and Experimental Analysis

Freeze–thaw process of backfill in a dam and its driving factors in seasonally frozen soil area

Contact Info

Product

Resources

About