Swell–shrink behaviour of lime precipitation treated soil

Thyagaraj, T.; Zodinsanga, Samuel

doi:10.1680/grim.12.00028

Cited by 33 publications

(8 citation statements)

References 21 publications

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“…Based on the outcomes of these studies, a repeated technique may either induce an increment or reduction of expansion potential. Research works conducted by [34,35,36] reported that heaving soils exposed to successive drying and wetting exhibits a considerable reduction in expansion potential. Also, other researchers like [37,38,39] have reported a contrary impact in which the cyclic procedure of wetting and drying induces a perceptible increment of SP.…”

Section: Wetting-drying Cyclesmentioning

confidence: 99%

Stabilization of Expansive Soils Using Mechanical and Chemical Methods: A Comprehensive Review

Fondjo¹,

Theron²,

Ray³

2021

cea

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The presence of expansive soils on construction sites is problematic in geotechnical engineering. The swell-shrink behaviour makes these soils not suitable to be used in their natural state. The expansive soil damages cause financial loss yearly more than floods, hurricanes, tornadoes, and earthquakes combined. Moreover, the cost of cut to spoil of expansive soils during construction projects has continued to rise because of the high cost of earthworks, haulage, and the increasing scarcity of spoil areas because of the built environment. Nonetheless, a proper stabilization technique can significantly enhance the expansive soil's properties. The research project attempts to review, report the limits and merits of mechanical and chemical methods utilized to stabilize expansive soils in line with their efficiency, environmental concerns, and cost-effectiveness. A review of mechanical and chemical treatment techniques is conducted in this regard. Ultimately, each stabilization method exhibits its merits and limitations. The lack of standards for the treatment of swelling soils is a significant problem in engineering practice. Specialists in the domain of soil treatment must work together to obtain an optimized stabilization approach and protocol. Moreover, engineers should perform a geoenvironmental assessment appropriate for chemical stabilization methods and additives utilized. This research work contributes as a guideline in the selection and application of chemical and mechanical stabilization methods.

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Section: Wetting-drying Cyclesmentioning

confidence: 99%

Stabilization of Expansive Soils Using Mechanical and Chemical Methods: A Comprehensive Review

Fondjo¹,

Theron²,

Ray³

2021

cea

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“…The self-healing of desiccation crack within compacted samples mentioned above is different from that in some previous studies, which mainly reported the self-healing of cracks within compacted samples subjected to wet-dry cycles (Day, 1994;Al-Homoud et al, 1995;Basma et al, 1996;Rao et al, 2000;Tripathy et al, 2002;Masrouri., 2008,2010a;Tripathy and Subba Rao, 2009;Thyagaraj and Zodinsanga, 2014), or within treated samples containing different additives (Guo et al, 2018;Vail et al, 2019;Tabassum and Bheemasetti, 2020). The occurrence of crack self-healing of specimen during a single drying indicates that the mechanism of cracking in compacted soil is a complex process.…”

Section: Introductionmentioning

confidence: 99%

Effect of initial water content and dry density on the self-healing of desiccation cracks in compacted hipparion red clay

Zhu

Zheng²,

Lan³

et al. 2022

Front. Earth Sci.

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The self-healing of desiccation cracks in compacted clayey soils is important for mechanism revelation of cracking behavior in compacted soils. Although the crack self-healing behavior has been found, the influence of soil physical indices on it is still unclear, especially initial water content and dry density of specimen. This study aims to identify and evaluate the effect of initial water content and dry density on self-healing of desiccation cracks. Firstly, a series of desiccation tests were conducted on compacted Hipparion red clay specimens under different initial conditions. Secondly, the two-dimensional morphology of desiccation cracks and strain field changes on specimen surface were examined using the pore and crack analysis system and digital image correlation techniques. The result shows that the desiccation cracks on specimen surface exhibits self-healing behavior during drying. Based on the observed crack self-healing behavior, the desiccation cracking of compacted Hipparion red clay undergoes four stages including initiation, development, self-healing, and stabilization. During the self-healing stage, the critical water content for occurrence of crack self-healing and the crack self-healing amount referring to the crack ratio reduction from peak value to the stable value, are dry density dependent and water content dependent variables. In particular, the higher the initial water content and the lower the dry density of compacted specimen are, the larger the crack self-healing amount is. This crack self-healing difference in specimen with different initial conditions is caused by the vertical anisotropic shrinkage of substrate soil below non-propagating cracks due to its pore structure difference. This study provides a new perspective on the mechanism of desiccation crack in clayey soils affected by initial conditions.

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“…As reações entre a cal e os minerais de argila presentes no solo resultam em mudanças das propriedades plásticas e estrutura do solo e por tanto em uma maior capacidade de carga e resistência mecânica. Schanz et al (2017) (Emarah e Seleem, 2017;Belchior et al, 2017;Abd el-aziz et al, 2013;Schanz et al, 2017;Robin et al, 2015;Thyagaraj et al, 2014). Um dos efeitos mais importantes da adição de cal é o ganho na resistência mecânica, cujo aumento depende de vários fatores como o tempo de cura, o teor de cal usado e a temperatura.…”

Section: Introductionunclassified