Effects of lime treatment on the microstructure and hydraulic conductivity of Héricourt clay

Tran, Thanh Danh; Cui, Yu‐Jun; Tang, Anh Minh; Audiguier, Martine; Cojean, Roger

doi:10.1016/j.jrmge.2014.07.001

Cited by 73 publications

(24 citation statements)

References 9 publications

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“…Generally, the reaction of lime and cement with clay led to the formation of aggregates, and this state led to an increase in porosity among the soil mixtures in uncured samples. Similar pore size distributions were observed by Tran, Cui, Tang, Audiguier, and Cojean (2014) and Rajasekaran and NarasimhaRao (1997). A decreased pore size distribution occurred with increased curing days.…”

Section: N Uralsupporting

confidence: 80%

Effects of additives on the microstructure of clay

Ural

2015

Road Materials and Pavement Design

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Some soils under construction cause numerous problems in terms of geotechnical engineering. Clay soils cause significant problems in the construction of roads, airports, pavements and highways. Some soils contain mixed additives, such as lime, cement, fly ash and bitumen. In this study, the microstructures of uncured and cured lime/cement-stabilised clay samples are investigated. Compacted soil samples were evaluated by mercury intrusion porosimetry, X-ray diffraction, scanning electron microscopy (SEM) analyses and specific surface area analysis. The results indicated that the addition of lime and cement was effective in the treatment of compaction properties. The pore sizes in the SEM images vary with an increase in the percentage of lime and cement and an increase in curing time.

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Section: N Uralsupporting

confidence: 80%

Effects of additives on the microstructure of clay

Ural

2015

Road Materials and Pavement Design

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“…However, most of analyses focused only on the determination of the influence of the pore size distribution, while omitting properties such as the shape and configuration of particle surface (Cuisinier et al, 2011;Garcia-Bengochea, 1978;Sasal et al, 2006;Tran et al, 2014;White and Williams, 1999). Some empirical equations, such as the Kozeny-Carman formula or its simplified form proposed in the Taylor formula, are an attempt to describe the shape and curvature of pores (Carrier, 2003;Lambe and Whitman, 1979).…”

Section: Introductionmentioning

confidence: 99%

Influence of soil particle shape on saturated hydraulic conductivity

Zięba

2016

Journal of Hydrology and Hydromechanics

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Abstract:The aim of this paper is to define the correlation between the geometry of grains and saturated hydraulic conductivity of soils. The particle shape characteristics were described by the ζ 0C index (Parylak, 2000), which expresses the variability of several shape properties, such as sphericity, angularity and roughness.The analysis was performed on samples of four soils, which were characterised by the same grain size distribution and extremely different particle structure. The shape characteristics varied from ideally spherical, smooth grains (glass microbeads GM) to highly irregular and rough particles (fly ash FA).For each soil, laboratory tests of saturated hydraulic conductivity (constant head test CHT and falling head test FHT) were performed. Additionally, an empirical analysis of effective pore diameter was conducted with use of the analytical models developed by Pavchich (Wolski, 1987) and Indraratna and Vafai (1997). The models were modified by introducing the ζ 0C index.Experiments have shown that saturated hydraulic conductivity depends on grains shape and surface roughness. This parameter decreases with the increase in the irregularity of soil particles. Moreover, it was proven that the ζ 0C reflects the relationship between effective pore diameter and grain shape characteristics.

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“…Lime treatment could effectively improve both the workability and mechanical behaviours of problematic soils [1][2][3][4][5][6]. When quicklime (CaO) is added into humid soil and mixed together, hydration of quicklime takes place immediately with heat release.…”

Section: Introductionmentioning

confidence: 99%

Aggregate size effect on the water retention properties of a lime-treated compacted silt during curing

Wang¹,

Cui²,

Tang³

et al. 2016

E3S Web Conf.

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Abstract.The main drying paths of the water retention curves of lime-treated soils were measured. Aggregate size effect on the water retention property was emphasised. Four soil powders with different maximum aggregate sizes (Dmax = 5, 2, 1 and 0.4 mm) were prepared and mixed with 2% quicklime (by weight of dry soil). Samples were prepared by static compaction at dry side of optimum water content (w = 17%) with a dry density of 1.65 Mg/m 3 .Suction measurement was performed by a dew-point hygrometer at different curing periods (t = 7, 28 and 90 days).The results obtained show that: i) aggregate size effect is insignificant on the water retention curve of untreated soil in the studied suction range (ca 500 kPa ~ 55 MPa); ii) lime treatment gradually improves the soil water retention capacity with the increasing of curing time; iii) aggregate size effect on water retention property of lime-treated soil becomes significant in the suction range from ca 860 kPa to 9 MPa on the long curing term: treated soils prepared with smaller aggregate size (S0.4 and S1) have a higher water retention capacity rather than soils prepared with larger aggregate size (S5).

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Effects of lime treatment on the microstructure and hydraulic conductivity of Héricourt clay

Cited by 73 publications

References 9 publications

Effects of additives on the microstructure of clay

Effects of additives on the microstructure of clay

Influence of soil particle shape on saturated hydraulic conductivity

Aggregate size effect on the water retention properties of a lime-treated compacted silt during curing

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