Amélioration des propriétés d’un tuf naturel utilisé en technique routière saharienne par ajout d’un sable calcaire

Goual, Idriss; Goual, Mohamed Sayeh; Taïbi, Saïd; Abou-Bekr, Nabil

doi:10.1080/19648189.2012.667653

Cited by 25 publications

(12 citation statements)

References 10 publications

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“…It was specified that the results presented corresponds for each curing time to an average calculated over three specimens. This result shows that the compressive strength increases in a rapid manner up to 28 days, this is explained by the rapid decrease of the water content caused by the drying of the surface regions (Goual et al 2012). An 85% rate of resistance was acquired in 28 days.…”

Section: Influence Of Cement On the Optimal Propertiesmentioning

confidence: 79%

“…The unconfined compression test is one of the laboratory tests widely used in pavement and soil stabilization applications. The simple compression test is often used as an index for quantifying soil improvement due to treatment (Shrestha 2008;Sariosseiri and Muhunthan 2009;Viana Da Fonseca et al 2009;Goual et al 2012;Asgari et al 2013).…”

Section: Influence Of Cement On the Optimal Propertiesmentioning

confidence: 99%

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Effect of Treatment with Cement on the Mechanical Characteristics of Silt from Telagh Region of Sidi Belabes, Algeria

2015

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In Algeria the use of soil treated with hydraulic binder is not responded because the very few sites already completed have not experienced feedback to confront the knowledge on the subject. Most soils in their natural condition lack the strength, dimensional stability and durability required for building. These inherent deficiencies may be overcomed through a process of stabilization by mechanical compaction and addition to the soil matrix of chemical binders, such as cement or lime. High water content and low workability of local soils have often caused difficulties for highway construction projects. The addition of a few percentages by weight of cement has shown its effectiveness towards better control of workability during compaction and significant cost savings over removal and replacement of backfill material in some projects (Sariosseiri and Muhunthan in Eng Geol 104: [119][120][121][122][123][124][125] 2009). This paper is focused on understanding the compaction characteristics and mechanical properties of compacted cement stabilised soil mixtures. We opted to base our work on a laboratory study, conducting soil-cement mixtures.A soil area Telagh was treated with cement varying each time the quantities of cement and water, in order to observe the influence of dosage and the amount of water present in the mixture on compressive strength and the stiffness of the material. In this study, natural silty soil extracted from the locality Guetna of region ''Telagh'' was characterized and mixed with cement to prepare compacted cylindrical samples to standard Proctor (OMC) of different cement doses and different water-cement ratios. After curing, the hardened samples were tested and their compressive strength was investigated for different duration. Another important parameter is considered in this study is the extent of the permeability of the soils treated with cement, as our material can be used for building dams and dykes. The results of the first part of this study showed the influence of cement content on compaction characteristics and water permeability of stabilized Guetna soil. The results from the second part of this study showed the effect of time lag, watercement ratios, and dosage of cement on the compressive strength and elastic modulus of the investigated. Salient conclusions of the study are (a) compaction characteristics of soils are affected by the addition of cement, in particular the water content that increases with high doses of cement, (b) compressive strength increased with dosage of cement varying to 2 % at 6 %, even at lower values of cement doses, (c) in contrast, the water contact on soil leads to a marked decrease in compression strength, (d) the results also indicated that the water permeability decrease when le cement content increased, (e) the elastic modulus defined at 50 % of peak strength is determined for studied material at different binder contents and different curing times, (f) the development of elastic modulus is in accordance with compressive strength. A quantitative corre...

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Section: Influence Of Cement On the Optimal Propertiesmentioning

confidence: 79%

Section: Influence Of Cement On the Optimal Propertiesmentioning

confidence: 99%

Effect of Treatment with Cement on the Mechanical Characteristics of Silt from Telagh Region of Sidi Belabes, Algeria

2015

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“…These valuable materials are becoming increasingly rare or even non-existent in certain Saharan regions [2,3]. The challenge to design roads at an optimized cost has encouraged engineers to innovate by taking advantage of the characteristics offered by the area, and to widen the range of materials used in pavement bodies [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…In this context, alternatives such as the recovery of local materials like tuff and dune sand have been exploited to compensate for the lack of the standard materials for pavements. Indeed, dune sands cover about 60% of the Sahara [9] and tuffs cover approximately 300,000 km 2 [8]. The use of the raw tuff as the only material in the base and foundation layers of Saharan roads has been reported in [10,11].…”

Section: Introductionmentioning

confidence: 99%

Hydro-mechanical behavior from small strain to failure of tuffs amended with dune sand – Application to pavements design in Saharan areas

Daheur

Taïbi

Goual

et al. 2021

Construction and Building Materials

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“…The present work aims to study the thermal conductivity of a local material used in the formulation of compressed earth blocks (CEB). This material is a calcareous tufa available in abundance in different regions of Algeria and widely used in roads construction [19][20][21]. Raw and lime-treated compacted samples were considered in order to investigate the effect of the hydric state (water content and degree of saturation) variations on the thermal conductivity.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Hydric State and Lime Treatment on the Thermal Conductivity of a Calcareous Tufa

Mekaideche

Derfouf²,

Laïmeche

et al. 2021

Civ Eng J

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An experimental study was conducted to investigate changes of thermal conductivity of a raw and lime-treated calcareous tufa (north-west of Algeria) during drying process. Treated (with 4% of lime) and untreated samples were prepared by static compaction at the Standard Proctor Optimum (SPO), Modified Proctor Optimum (MPO) and at a constant stress level of 4 MPa. Transient Hot Wire (THW) method was used to measure the thermal conductivity and the water content and degree of saturation of samples were determined at various drying times. Results show that the drying process induces a decrease in thermal conductivity. This parameter seems to vary linearly with the water content and the degree of saturation. In addition, it was found that the lime treatment leads also to a decrease in the thermal conductivity. Thus, the drying process and the lime treatment will jointly contribute to the reduction of the thermal conductivity of the studied material in such a way that it is more insulating than some traditional building materials like concrete or fired bricks. Doi: 10.28991/cej-2021-03091663 Full Text: PDF

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Amélioration des propriétés d’un tuf naturel utilisé en technique routière saharienne par ajout d’un sable calcaire

Cited by 25 publications

References 10 publications

Effect of Treatment with Cement on the Mechanical Characteristics of Silt from Telagh Region of Sidi Belabes, Algeria

Effect of Treatment with Cement on the Mechanical Characteristics of Silt from Telagh Region of Sidi Belabes, Algeria

Hydro-mechanical behavior from small strain to failure of tuffs amended with dune sand – Application to pavements design in Saharan areas

Influence of the Hydric State and Lime Treatment on the Thermal Conductivity of a Calcareous Tufa

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