A study of the water retention curve of lime-treated London Clay

Zhang, Xiwei; Mavroulidou, Maria; Gunn, Michael

doi:10.1007/s11440-015-0432-6

Cited by 45 publications

(14 citation statements)

References 38 publications

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“…By analyzing the changes in the water retention curve when the substrate was compacted (Figure 3), it was clear that the pores decreased their size, diminishing the θ s and increasing the air-entry pressure (h b = α −1 ) due to an increase in the capillary forces [37]. These changes in the porous media water retention capacity are consistent with the observations published in the scientific literature [2,15,24,25,46,47]. For instance, in the S2 compacted water retention curve, the h b increased from 17 to 526 cm, while the h b of the S1 substrate increased from 9 to 53 cm.…”

Section: Discussionsupporting

confidence: 84%

A New Method to Determine How Compaction Affects Water and Heat Transport in Green Roof Substrates

Sandoval

Suárez

2019

Applied Sciences

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Although compaction affects water and heat transport processes in porous media, few studies have dealt with this problem. This is particularly true for substrates, which are artificial porous media used for engineering and technological solutions, such as in vegetated or green roofs. We propose a methodology to study the effect of substrate compaction on the characterization of physical, hydrodynamic and thermal properties of five green roof substrates. The methodology consists in a parametric analysis that uses the properties of a substrate with known bulk density, and then modifies the substrate properties to consider how compaction affects water and heat fluxes. Coupled heat and water transport numerical simulations were performed to assess the impact of the changes in the previous properties on the hydraulic and thermal performance of a hypothetical roof system. Our results showed that compaction reduced the amplitude of the fluctuations in the volumetric water content daily cycles, increasing the average water content and reducing the breakthrough time of the green roof substrates. Compaction changes the thermal behavior of the green roof substrates in different ways for each substrate due to the dependence of the air, water and soil fraction of each substrate.

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Section: Discussionsupporting

confidence: 84%

A New Method to Determine How Compaction Affects Water and Heat Transport in Green Roof Substrates

Sandoval

Suárez

2019

Applied Sciences

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“…The drying path of untreated silt is located slightly below the drying path of lime treated and lime-hydraulic binder treated silts. The obtained water retention curves showed that lime and lime-hydraulic binder treatments increased the water retention capacity of silty soils, confirming the previous findings 10/31 by some authors [15,39,40]. This can be connected to the impact of these treatments on the soil micro-structure [16,21,41,42].…”

Section: Water Retention Curvethermal Propertiessupporting

confidence: 87%

Impact of monotonic and cyclic suction variations on the thermal properties of a stabilized compacted silty soil

Menaceur

Cuisinier

Masrouri

et al. 2021

Transportation Geotechnics

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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“…Many studies were conducted to assess the influence of different factors on the water retention properties of the soil in geotechnical engineering applications. Numerous investigations (e.g., [23][24][25][26]) noted that the void ratio, water content, and stress state of a soil have a strong influence on the SWCC. Standard laboratory equipment based on the axis translation technique, such as the pressure plate, volume extractor, suction-controlled oedometer, modified triaxial apparatuses, and standard tensiometers, are the most common devices used to control or measure matric suction.…”

Section: Methods Used For Determination Of Soil-water Characteristic mentioning

confidence: 99%

Soil-Water Characteristic Curve of Residual Soil from a Flysch Rock Mass

et al. 2018

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Depending on the nature of the material and suction range, laboratory measurements of the soil-water characteristic curve (SWCC) can be time-consuming and expensive, especially for residual soils, in which a wide range of particle sizes and soil structures typically results in SWCCs that cover a wide range of suction. Investigations of the SWCCs of residual soil from flysch rock masses are rare, and so far, no results were presented in the literature which were obtained by performing measurements on undisturbed specimens. In this paper, a detailed examination of water retention characteristics is performed for a specific type of residual soil (CL) formed by the weathering of a flysch rock mass. Measurements performed by using different techniques and devices on intact specimens were successfully combined to obtain the SWCC during both drying and wetting processes, under different stress conditions, and from saturated to air-dried conditions. Used procedures are suitable for the determination of SWCCs of soils that undergo volume changes during the drying or the wetting process, since instantaneous volumetric water content can be determined. Results presented in this paper can be used to assess the influence of desaturation of the residual soil covering flysch slopes during dry summer periods by providing key-in material properties required to analyze the transient rainfall infiltration process.

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A study of the water retention curve of lime-treated London Clay

Cited by 45 publications

References 38 publications

A New Method to Determine How Compaction Affects Water and Heat Transport in Green Roof Substrates

A New Method to Determine How Compaction Affects Water and Heat Transport in Green Roof Substrates

Impact of monotonic and cyclic suction variations on the thermal properties of a stabilized compacted silty soil

Soil-Water Characteristic Curve of Residual Soil from a Flysch Rock Mass

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