Microstructure and hydraulic conductivity of a compacted lime-treated soil

Cuisinier, Olivier; Auriol, Jean Claude; Borgne, Tanguy Le; Deneele, Dimitri

doi:10.1016/j.enggeo.2011.07.010

Cited by 172 publications

(68 citation statements)

References 14 publications

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“…However, studies on the effects of quicklime in the context of soil sciences are scarce, or the specification is not clear, as a large body of literature only mentions the term 'lime' without further details on the material used. Quicklime and its ability to stabilise aggregates is described mostly in engineering papers (Beetham et al, 2014;Cuisinier et al, 2011;Idiart et al, 2012), whereas its potential application in agricultural soils has attracted less scientific attention. Therefore, our study analyses limestone and quicklime application as strategies for restoring structural stability in degraded agricultural soils.…”

Section: Resultsmentioning

confidence: 99%

“…However, the application of quicklime has so far not become a standard procedure in agricultural soil management, although it has recently been mentioned as 'structural lime' together with slaked lime applied to diminish P leaching (Bergström et al, 2015;Ulén and Etana, 2014). So far, lime-treatment stabilisation studies using quicklime have focused on engineering geology and civil engineering to improve fine textured soil in terms of engineering properties for earthwork projects (Cuisinier et al, 2011;Hashemi et al, 2015;Metelková et al, 2012). In this context, effective changes in soil properties, such as improvements in structure, stability, porosity, and aggregate strength, have been mentioned for silty and clayey soils (Little, 1995).…”

Section: Introductionmentioning

confidence: 99%

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Quicklime application instantly increases soil aggregate stability

Keiblinger

Bauer

Deltedesco

et al. 2016

International Agrophysics

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A b s t r a c t. Agricultural intensification, especially enhanced mechanisation of soil management, can lead to the deterioration of soil structure and to compaction. A possible amelioration strategy is the application of (structural) lime. In this study, we tested the effect of two different liming materials, ie limestone (CaCO 3 ) and quicklime (CaO), on soil aggregate stability in a 3-month greenhouse pot experiment with three agricultural soils. The liming materials were applied in the form of pulverised additives at a rate of 2 000 kg ha -1 . Our results show a significant and instantaneous increase of stable aggregates after quicklime application whereas no effects were observed for limestone. Quicklime application seems to improve aggregate stability more efficiently in soils with high clay content and cation exchange capacity. In conclusion, quicklime application may be a feasible strategy for rapid improvement of aggregate stability of fine textured agricultural soils.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Quicklime application instantly increases soil aggregate stability

Keiblinger

Bauer

Deltedesco

et al. 2016

International Agrophysics

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“…As melhorias das propriedades geotécnicas de solos estabilizadas com cal são atribuídas a quatro reações básicas: troca catiônica, floculação e aglomeração, carbonatação da cal e, finalmente, à reação pozolâni-ca [16,17,18,19,20,21]. Há consenso na literatura sobre os primeiros três tipos de reações como reações instantâneas.…”

Section: Introductionunclassified

Propriedades geotécnicas de um solo expansivo tratado com cal

et al. 2016

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RESUMOArgilas expansivas são consideradas como depósitos problemáticos para obras de infraestrutura porque podem causar danos socioeconômicos e ambientais, uma vez que são susceptíveis à mudança de volume devido à variação sazonal da umidade e temperatura. A estabilização da argila expansiva é de interesse para qualquer edificação. As técnicas de estabilização podem ser mecânicas ou químicas. A cal é um agente estabilizante. Ensaios de laboratório foram realizados com o objetivo de analisar o efeito da interação da cal com um solo expansivo de Ipojuca/PE, quando é adicionado cal nas proporções de 1% a 11% em peso seco. Foram investigadas as características físicas, químicas, mineralógicas, a expansão livre e a tensão de expansão do solo natural e na mistura solo-cal. Os resultados indicam que o solo tem alta expansividade, podendo causar danos às edificações levando à demolição, principalmente as de pequeno porte. A adição de cal ao solo causou uma agregação ou floculação das partículas originais e a redução no índice de plasticidade. O percentual de 11% de cal hidratada reduziu a expansão livre e tensão de expansão a valores nulos. Isto é atribuído à capacidade de cimentação do solo tratado com a cal que reduz a tendência de absorção de água das argilas saturadas com cálcio.Palavras-chave: Solo expansivo, métodos de investigação, solo-cal. ABSTRACTExpansive clays are problematic deposits for infrastructure projects because they can cause socio-economic and environmental damage, since they are susceptible to change in volume due to seasonal variation in humidity and temperature. The stabilization of expansive clay is of interest to any construction. The stabilization techniques may be mechanical or chemical. Hydrated lime is a stabilizing agent. Laboratory tests were conducted in order to analyze the effect of the interaction of hydrated lime with expansive soils of Ipojuca County / PE, when hydrated lime was added to it in proportions of 1% to 11% by dry weight. The physical, chemical and mineralogical characterizations were performed as well as the free swell and the expansion stress of natural soil and soil-lime mixture. The results indicate that the soil has high expansiveness and may cause damage to buildings leading to demolition, especially the smaller ones. The addition of hydrated lime to the soil caused an original aggregation or flocculation of particles and the decrease in plasticity index. The percentage of 11% of hydrated lime added to the expansive soil reduced the free swell and expansion stress to null values. This is attributed to the cementing capacity of the soil treated with lime which reduces the tendency of water absorption by the calcium saturated clay.

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“…In order to improve the workability and mechanical behavior of loess, lime is often added to loess as mixed fill materials of loess embankments. Lime treatment is an efficient way to improve the shear strength, plasticity and mechanical behaviors of loess through a series of physical-chemical reactions, including hydration, cation exchanges and pozzolanic reaction [11][12][13][14][15][16]. When lime is added to loess, lime induces the reduction of water content through hydration and produces large amount of.…”

Section: Introductionmentioning

confidence: 99%

Study on the Compaction Effect Factors of Lime-treated Loess Highway Embankments

Zhang

Wang

2017

CivileJournal

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This paper presents a study to investigate the effects of water content, lime content and compaction energy on the compaction characteristics of lime-treated loess highway embankments. Laboratory compaction tests were conducted to determine the maximum dry density and optimum water content of loess with different lime Contents (0, 3, 5 and 8%), and to examine the effects of water content, lime content and compaction energy on the value of and . In situ compaction tests were performed to obtain the in situ dry density . The value of − achieves it's maximum value when in situ water content − was larger than the value of (+1-2%). The degree of compaction can hardly be achieved to 100% in the field construction of embankments. Higher water content and compaction energy is needed for optimum compaction.

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Microstructure and hydraulic conductivity of a compacted lime-treated soil

Cited by 172 publications

References 14 publications

Quicklime application instantly increases soil aggregate stability

Quicklime application instantly increases soil aggregate stability

Propriedades geotécnicas de um solo expansivo tratado com cal

Study on the Compaction Effect Factors of Lime-treated Loess Highway Embankments

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