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

Daheur, Elhadj Guesmia; Taïbi, Saïd; Goual, Idriss; Li, Zhong-Sen

doi:10.1016/j.conbuildmat.2020.121948

Cited by 5 publications

(8 citation statements)

References 31 publications

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“…The present research is a continuation of previous experimental works conducted by Daheur et al [7,38]. The purpose is to extend the sustainable use of two Saharan soils (dune sand and tuff) to include future pavement applications under medium and heavy traffic loads and wide water conditions.…”

Section: Introductionmentioning

confidence: 76%

“…The TDSopt mixture was previously studied by Daheur et al [7,38], and its major geotechnical and mechanical properties are replicated in Table 1. American Association of State Highway and Transportation Officials (AASHTO) [50], Unified Soil Classification System (USCS) [51] and Technical guideline on the embankment and capping layer construction (GTR) [52,53] were used to classify the studied materials.…”

Section: Tdsopt Mixturementioning

confidence: 99%

“…In the Algerian Saharan regions, the dune sand has been extensively investigated for amended tuff to improve pavement in arid zones [36][37][38][39][40]. These two local materials are abundant and cover a very large area in this region [36].…”

Section: Introductionmentioning

confidence: 99%

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Valorisation of dune sand-tuff for Saharan pavement design

Daheur

Demdoum

et al. 2023

Construction and Building Materials

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Section: Introductionmentioning

confidence: 76%

Section: Tdsopt Mixturementioning

confidence: 99%

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Valorisation of dune sand-tuff for Saharan pavement design

Daheur

Demdoum

et al. 2023

Construction and Building Materials

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“…In the same context, they have investigated the behavior of sand-tuff mixtures under small-strain cyclic triaxial tests and constant water content conditions. The obtained results show that the effect of confining stress becomes dominant at the lower suction level and negligible when suction increases [18]. On the other hand, according to Taiba et al [19], the shape and grain size of granular materials were considered essential parameters to improve the characteristics of the soil to be used.…”

Section: Introductionmentioning

confidence: 95%

Co-valorization of Tuff and Sandy Residues in Roads Construction

et al. 2022

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In recent years, the use of local materials in pavements has developed to compensate for the lack of normalized standard materials in the Algerian arid regions. The main objective of this research is to assess the co-valorization of two local materials to design a road material with satisfactory characteristics. In this context, the use of tuff in combination with sand residues is explored. The evolution of the characteristics of tuffs mixed with sand residues according to percentages ranging from 0% to 50% is highlighted. The used materials were subjected to physical and mechanical tests. Then, a series of mechanical tests were carried out on mixed samples compacted at the optimal characteristics that were deduced from the modified Proctor test. The obtained results highlight the existence of an optimal formulation composed of 70% tuff and 30% sandy residues, which presented an unconfined compressive strength (UCS) of 5.16 MPs and a CBR index (CBRI) of 42.6 %. Moreover, the results show clearly the evolution of the measured characteristics with time (drying) and without the addition of binders. The possibility of the use of studied mixtures in pavements has been verified regarding the recommendations in use (CTTP 2001) and the Saharan Road Technique (SRT). Doi: 10.28991/CEJ-2022-08-05-013 Full Text: PDF

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

Cited by 5 publications

References 31 publications

Valorisation of dune sand-tuff for Saharan pavement design

Valorisation of dune sand-tuff for Saharan pavement design

Co-valorization of Tuff and Sandy Residues in Roads Construction

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

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