Experimental study on instability of bases on natural and lime/cement-stabilized clayey soils

Yong, Raymond N.; Ouhadi, V R

doi:10.1016/j.clay.2006.08.009

Cited by 201 publications

(66 citation statements)

References 31 publications

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“…For a similar class soil, Afès and Didier [2] reported that the use of 6%L the PL increases from 24% up to 32.4 and 34% after curing for 7 and 30 days, respectively. Similar observations for similar class soil were reported by several researchers [4,25,26]. It is known that the use of L leads to the flocculation of clay particles which causes an immediate increase in PL.…”

Section: Variation Of Plastic Limit In the Absence Of Caso 4 2h 2 Osupporting

confidence: 77%

“…Table 7, the addition of 8%L to the RS increases the LL from 46.5% up to 54.9 and 59.6% after curing for 1 and 30 days, respectively. For the same class soil, Yong and Ouhadi [25] observed that with 10%L as an additive the LL increases from 49.6% up to 56.5 and 75% after curing for 1 and 30 days, respectively. A similar observation was reported by Asgari et al [4].…”

Section: Soil-l-sulphate Soil-np-sulphate and Soil-l-np-sulphate MIXmentioning

confidence: 99%

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Effect of Calcium Sulphate on the Geotechnical Properties of Stabilized Clayey Soils

Gadouri

Harichane

Ghrici

2016

Period. Polytech. Civil Eng.

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An experimental investigation was undertaken to study the effect of calcium sulphate (CaSO 4 .2H 2 O) on the behaviour of the grey clay (GS) and red clay (RS) soils stabilized with lime (L), natural pozzolana (NP) and their combination (L-NP Keywords Clayey soil, lime (L), natural pozzolana (NP), calcium sulphate, plasticity index (PI), unconfined compressive strength (UCS) IntroductionCivil engineering projects located in areas with inappropriate soils is one of the most frequent problems in the world. Soil stabilization technique has been practiced for several years with the main aim to render the soils capable of meeting the requirements of the specific engineering projects [1]. Hydraulic binders (cement and L) were used as stabilizers in various civil engineering fields. Soils stabilization is a technique that requires the use of hydraulic binders alone or in combination with other mineral additives such as fly ash. Extensive studies have been carried out to study the different effects produced by the use of cement alone or in combination with L [2-4], rice husk ash, [5][6][7] and fly ash [8, 9] on physico-mechanical properties of soils.In the absence of sulphates, the reduction in the repulsion forces between the clay particles (due to the L addition) creates a bond between them and forms flocks. This change caused by L reduces the plasticity index and the maximum dry density of the stabilized soil but increases their optimum moisture content [10]. At the later stage, the increase in the concentration of hydroxyl (OH -) from L raises the pH of the soil, and causes the dissolution of alumina and silica which interact with calcium ions to form cementing products such as calcium silicate hydrates (CSH) and calcium aluminate hydrates (CAH). The formation of these compounds is responsible on the increase in unconfined compressive strength (UCS) values of the stabilized soil [11] and their shear strength values [12].However, in the presence of sulphates, the sulphate ions react with calcium, hydroxyl and aluminium compounds to form expansive phases such as ettringite. Furthermore, the magnitude of damage caused by the ettringite depends on the soil nature, the type and the content of additives [3] and the concentration and the type of cation associated with the sulphate anion [13]. Indeed, the effects caused by the presence of different types of sulphates on the geotechnical properties of soils stabilized with additives have been investigated by several researchers [13][14][15][16][17][18][19].

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Section: Variation Of Plastic Limit In the Absence Of Caso 4 2h 2 Osupporting

confidence: 77%

Section: Soil-l-sulphate Soil-np-sulphate and Soil-l-np-sulphate MIXmentioning

confidence: 99%

Effect of Calcium Sulphate on the Geotechnical Properties of Stabilized Clayey Soils

Gadouri

Harichane

Ghrici

2016

Period. Polytech. Civil Eng.

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“…For the red soil classified as CL class clay, the liquid limit increased from 47.8% to 59% for the addition of 6% lime. For a similar class soil, Yong and Ouhadi [27] observed that the liquid limit increases from 45.8% to 55% for the addition of 6% lime, whereas Bell [28] reported an increase from 30% to 37% for the addition of 8% lime. The increases and decreases in Atterberg's limits depend on the type of soil.…”

Section: Specimen's Preparation and Testing Proceduresmentioning

confidence: 99%

Stabilization of Algerian Clayey Soils with Natural Pozzolana and Lime

Harichane

Ghrici

Kenaï

2017

Period. Polytech. Civil Eng.

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“…Accordingly, hydrolysis of calcium hydroxide raises pH to 12.3. 15,16) The significant pH increase largely depends on the amount of free calcium oxide. The calcium ion derived from the hydrolysis of calcium hydroxide also reacts with silicate and aluminate and accordingly forms lime-pozzolan.…”

Section: Introductionmentioning

confidence: 99%

Determination Method for Maximum Calcium Releasing Potential from Steel Slags, Marine Sands Alternatives in Seawater

et al. 2013

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Sea grass beds and tidal flats are facing imminent dangers of extinction. Steel slags are one of the promising alternative materials for marine sands to restore sea grass beds and tidal flats. On the other hand, significant pH increase and solidification attributed to dissolving calcium released from the slags are sometimes negative impact on ecosystems. To quantify the dissolved calcium, Japan Cement Association Standard method is conventionally used. However, our study leveled the method underestimate the dissolved calcium from the steel slags. The purpose of this study is to optimize the determination method for maximum calcium releasing potential from steel slags. Powdered sample (0.1 g) was stirred in 40 mL of 99.5% ethyleneglycol-100 mM tris buffer solution for 6 h at 80±5°C. Thereafter, the solution filter through 0.45 μm filter and the dissolved calcium was determined by ICP-AES. The optimized condition proposed in this study recovered the dissolved calcium from the slag in seawater perfectly.

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Experimental study on instability of bases on natural and lime/cement-stabilized clayey soils

Cited by 201 publications

References 31 publications

Effect of Calcium Sulphate on the Geotechnical Properties of Stabilized Clayey Soils

Effect of Calcium Sulphate on the Geotechnical Properties of Stabilized Clayey Soils

Stabilization of Algerian Clayey Soils with Natural Pozzolana and Lime

Determination Method for Maximum Calcium Releasing Potential from Steel Slags, Marine Sands Alternatives in Seawater

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