Laboratory Studies on Stabilization of an Expansive Soil by Lime Precipitation Technique

Thyagaraj, T.; Rao, Sudhakar M.; Suresh, P. Sai; Salini, U.

doi:10.1061/(asce)mt.1943-5533.0000483

Cited by 65 publications

(27 citation statements)

References 12 publications

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“…Similar observations were made by Rao and Venkataswamy (2002). j Construction of lime columns in very stiff expansive soil deposits is difficult (Rao and Thyagaraj, 2003;Rao and Venkataswamy, 2002;Thyagaraj et al, 2012).…”

Section: Introductionsupporting

confidence: 61%

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Swell–shrink behaviour of lime precipitation treated soil

Thyagaraj¹,

Zodinsanga²

2014

Proceedings of the Institution of Civil Engineers - Ground Impr

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Previous investigation showed that sequential mixing of calcium chloride and sodium hydroxide solutions with an expansive soil resulted in lime precipitation in the soil mass, which controlled the swelling potentials and increased the unconfined compressive strength of treated specimens through strong modification and pozzolanic reactions.However, expansive soils in the field are subjected to cyclic wetting and drying due to environmental conditions, which affects the swell-shrink behaviour. Therefore, the present investigation examines the efficacy of the lime precipitation technique in controlling the swell-shrink potentials and strength characteristics of expansive soils subjected to cyclic wetting and drying. Expansive soil is mixed sequentially with different concentrations of calcium chloride and sodium hydroxide solutions to yield a range of lime precipitation contents, and cured for different time periods. The cured specimens were subjected to cyclic wetting and drying in modified odeometer cells, and the swell-shrink potentials were monitored. The unconfined compressive strength of cured specimens was also determined after different cycles of wetting and drying in a sand bath. The laboratory results showed that the second swell potential was the maximum for untreated and lime precipitation treated specimens, in comparison with other wetting cycles. The equilibrium state was reached after about four to five cycles of wetting and drying. The equilibrium bandwidth reduced as the percentage lime precipitation and curing period increased. The unconfined compressive strength reduced with wetting and drying cycles, which indicated the loss of cementation after one wetting and drying cycle.Ground Improvement Volume 167 Issue GI4Swell-shrink behaviour of lime precipitation treated soil Thyagaraj and Zodinsanga

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Section: Introductionsupporting

confidence: 61%

“…3 g/l) (Murty and Krishna, 2007;Puppala et al, 2007;Rao and Thyagaraj, 2003;Thyagaraj et al, 2012). Thyagaraj (2001) found that the lime piles could increase the soil pH to 8 .…”

Section: Introductionmentioning

confidence: 99%

Swell–shrink behaviour of lime precipitation treated soil

Thyagaraj¹,

Zodinsanga²

2014

Proceedings of the Institution of Civil Engineers - Ground Impr

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“…Overall, when lime is added to soil, reduction in swell potential occurs primarily because of alteration in clay structure [18,25,26]. Figure 13 shows the hydraulic conductivity values of the quick and hydrated lime stabilized lateritic soil.…”

Section: Swell Potentialmentioning

confidence: 99%

Use of quick and hydrated lime in stabilization of lateritic soil: comparative analysis of laboratory data

Amadi

Okeiyi

2017

Geo-Engineering

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“…Such soils need to be stabilized to improve their properties for safe and stable construction on them. Lime stabilization has been the most widely used method for stabilization of expansive soils (AlMukhtar, Khattab, & Alcover, 2012;Bhuvaneshwari et al, 2013;Thyagaraj, Rao, Sai Suresh, & Salini, 2012). Stabilizing expansive soil by the addition of lime is an ancient art and an age-old practice, which has been followed all over the world.…”

Section: Introductionmentioning

confidence: 99%

Strength and microstructure of micro ceramic dust admixed lime stabilized soil

James¹,

Pandian²

2018

rdlc

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The use of micro ceramic dust (CD) as an additive to lime in soil stabilization has been analysed in this study. CD was obtained by crushing and sieving of waste ceramic tiles from construction debris. The initial consumption of lime (ICL) for soil modification was determined using Eades and Grim pH test. In order to study the effect of lime content on soil stabilization, three different lime contents (below ICL, ICL and above ICL) were used for stabilizing the soil. These three lime contents were amended with various amounts of CD to study its effect on the strength of the stabilized soil. Unconfined compression strength (UCS) tests were carried out on the stabilized soil specimens of dimensions 38mm x 76mm at different ages of curing. The spent UCS samples were crushed and sieved to carry out Atterberg limits and free swell tests followed by x-ray diffraction (XRD) and scanning electron microscopy (SEM) tests for determining changes in microstructure. The results indicated that the addition of CD resulted in a marginally negative influence on the early strength of the stabilized soil at three days of curing whereas it enhanced the delayed strength of the soil at 28 days of curing, gaining between 12-14% strength. The effect of CD on the plasticity and swell-shrink of lime stabilized soil indicated a further reduction in plasticity and swell-shrink nature. The mineralogy of the amended soil revealed the formation of CSH and CAH minerals responsible for strength gain. SEM images used to analyse the microstructure of the virgin and stabilized soil, indicated the formation of a dense and compact microstructure. Finally, it was concluded that CD can be adopted as an auxiliary additive to lime in stabilization of expansive soil with provision of sufficient curing and the delayed onset of early strength due to CD can be overcome by using higher lime content in stabilization.Key words: Expansive soil, lime stabilization, ceramic dust, strength, mineralogy, microstructure Resumen El uso de polvo de cerámica micro (CD) como un aditivo a la cal en la estabilización del suelo se ha analizado en este estudio. El CD se obtuvo triturando y tamizando las baldosas cerámicas de desecho de los desechos de la construcción. El consumo inicial de cal (ICL) para la modificación del suelo se determinó usando Eades y Grim pH test. Con el fin de estudiar el efecto del contenido de cal sobre la estabilización del suelo, se utilizaron tres contenidos diferentes de cal (por debajo de ICL, ICL y superior ICL) para estabilizar el suelo. Estos tres contenidos de cal fueron modificados con varias cantidades de CD para estudiar su efecto sobre la resistencia del suelo estabilizado. Se realizaron pruebas de resistencia a la compresión no confinada (UCS) en las muestras de suelo estabilizado de dimensiones 38 mm x 76 mm a diferentes edades de curado. Las muestras de UCS gastadas se trituraron y se tamizaron para llevar a cabo los límites de Atterberg y las pruebas de hinchamiento libre seguidas por difracción de rayos X (XRD) y microscop...

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Laboratory Studies on Stabilization of an Expansive Soil by Lime Precipitation Technique

Cited by 65 publications

References 12 publications

Swell–shrink behaviour of lime precipitation treated soil

Swell–shrink behaviour of lime precipitation treated soil

Use of quick and hydrated lime in stabilization of lateritic soil: comparative analysis of laboratory data

Strength and microstructure of micro ceramic dust admixed lime stabilized soil

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