Multi-scale analysis and time evolution of pozzolanic activity of lime treated clays

Vitale, Enza; Deneele, Dimitri; Paris, Michaël; Russo, Giacomo

doi:10.1016/j.clay.2017.02.013

Cited by 80 publications

(40 citation statements)

References 33 publications

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“…In addition to cationic exchange, the high pH environment induced by lime enables the dissolution of the alumino-silicate constituents of clay minerals, promoting the development of the pozzolanic reactions [15]. These reactions result in the formation of calcium silicate hydrate (CSH), calcium aluminate hydrate (CAH), and calcium alumino silicate hydrate (CASH) gels [19,20].…”

Section: Cmss-2017mentioning

confidence: 99%

“…Maintaining this rate is essential to guarantee the effectiveness of quicklime (CaO) stabilization of clays by means of pozzolanic reactions [15]. These latter allow to bind soil particles together and result in the improvement of the soil properties [23,24].…”

Section: Effect Of Lime On Ph Of Soils Samplesmentioning

confidence: 99%

“…The first reaction taking place is hydration reaction, highly exothermic, leading to the formation of hydrated lime in the clay water system. The dissociation reaction of the hydrated lime formed due to the quicklime hydration leads to an increase of the pH and to a high concentration of calcium ions in the pore water [15]. These phenomena cause several reactions in the soil matrix, creating a cation exchange effect and pozzolanic reactions [16].…”

Section: Introductionmentioning

confidence: 99%

“…On the one hand, because of its facility and economic appearance and on the other hand due to its effectiveness who allow to obtain engineering materials having superior properties [2][3][4][5][6]. Several studies on the basic lime-clay-reaction mechanisms have been widely reported in literature [7][8][9][10] allowing a better understanding of the physicochemical evolution of the system and micro structural features induced after the addition of lime [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of quick lime on physicochemical properties of clay soil

Bessaim

Missoum

et al. 2018

MATEC Web Conf.

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Abstract. Clay soils are known for their water sensitivity, which causes irreparable damage to any structure built on this type of soil. In order to avoid such problem, it is necessary to use various improvement and stabilization methods such as treatment with lime. This process has been used successfully in the field for decades. The addition of lime generates various physicochemical reactions within the soil such as cation exchange and pozzolanic reactions which are largely responsible for the improvement of the soil in question. This paper presents a study concerning the variation of physicochemical properties of clayey soil with the addition of quicklime at different percentages. Experiments were performed on two clayey soils (CL type) in order to investigate the influence of quicklime on Atterberg limits and pH. These tests were carried out in an attempt to study and follow the development and progression of various reactions occurred within the soil with various lime percentages. The results show that the addition of quicklime causes a significant improvement in soil properties by reducing plasticity and thereby improves the soil workability. It can also be found that the addition of lime increase pH of soil, which allow activating pozzolanic reactions who tend to stabilize the soil in question by formation of cementitious compounds. Finally, the pH can be considered as a relevant parameter who allows a better understanding of the reactions that occur in the soil matrix.

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Section: Cmss-2017mentioning

confidence: 99%

Section: Effect Of Lime On Ph Of Soils Samplesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of quick lime on physicochemical properties of clay soil

Bessaim

Missoum

et al. 2018

MATEC Web Conf.

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“…Pozzolanic activity is connected to the availability of silica and alumina in a high pH environment promoting the formation of cementitious compounds responsible for mechanical improvement of treated soils [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Behaviour of Soil Improved by Alkali Activated Binders

et al. 2017

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Abstract:The use of alkali activated binders to improve engineering properties of clayey soils is a novel solution, and an alternative to the widely diffused improvement based on the use of traditional binders such as lime and cement. In the paper the alkaline activation of two fly ashes, by-products of coal combustion thermoelectric power plants, has been presented. These alkali activated binders have been mixed with a clayey soil for evaluating the improvement of its mechanical behaviour. One-dimensional compression tests on raw and treated samples have been performed with reference to the effects induced by type of binder, binder contents and curing time. The experimental evidences at volume scale of the treated samples have been directly linked to the chemo-physical evolution of the binders, investigated over curing time by means of X Ray Diffraction. Test results showed a high reactivity of the alkali activated binders promoting the formation of new mineralogical phases responsible for the mechanical improvement of treated soil. The efficiency of alkali activated binders soil treatment has been highlighted by comparison with mechanical performance induced by Portland cement.

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Mechanical and Hydraulic Properties of Bentonite Clay Stabilized with Cement, Lime, and Mixed Lime-Cement by Dry and Wet Methods After 5 Years of Curing

Farzi

Pakbaz

2018

Recent Advancements on Expansive Soils

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Multi-scale analysis and time evolution of pozzolanic activity of lime treated clays

Cited by 80 publications

References 33 publications

Effect of quick lime on physicochemical properties of clay soil

Effect of quick lime on physicochemical properties of clay soil

Mechanical Behaviour of Soil Improved by Alkali Activated Binders

Mechanical and Hydraulic Properties of Bentonite Clay Stabilized with Cement, Lime, and Mixed Lime-Cement by Dry and Wet Methods After 5 Years of Curing

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