Unconfined compression strength of an artificially cemented aeolian dune sand of Natal/Brazil

Fontoura, Tahyara Barbalho; Santos, Olavo Francisco dos; Severo, Ricardo Nascimento Flores; Coutinho, Roberto Quental; Junior, P.L. Souza

doi:10.28927/sr.2021.049920

Cited by 2 publications

(1 citation statement)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For some others applications, sands are treated with a special process. Many studies have investigated the aeolian sands to several targets as, geotechnical characterization [4], operating in pavement and concrete [5,6], and soil reinforcement with sands [7,8].…”

Section: Introductionmentioning

confidence: 99%

Effect of Grain Size and Distribution on Mechanical Behavior of Dune Sand

Boudia

Berga

2021

Civ Eng J

View full text Add to dashboard Cite

Sand is a major component of soils. It is widely used in manufacturing and construction. In geomechanics, one characterizes sand according to various aims. This paper investigates, for local sands, the effect of grain size and granular distribution on the mechanical behavior in terms of strength and stress-strain relationship. For this purpose, dune sands of the great Occidental Erg, from Algeria, are analyzed, according to the Mohr-Coulomb criterion. The study uses three kinds of sands. Every kind is divided into three sizes classes. Then, the experimental program conducts a set of direct shear tests, under various vertical stresses, using the small shear box (60 × 60 mm). The results show that the particle size and distribution have a direct effect on the mechanical behavior of the dune sand. Then, the dominant size class governs the natural sand behavior. Moreover, the peak shear strength increases as particle size increases. This indicates that there is an increase in peak friction angle with the increase of particles size and the sands consider as a purely cohesionless material. In addition, the experimental analysis shows that density and confinement stress is not sufficient to interpret the mechanical behavior. Indeed, mineralogy and surface state can influence the shear strength. These conclusions lead to the relevance of the sand genesis and the importance of the local materials thematic. Doi: 10.28991/cej-2021-03091730 Full Text: PDF

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of Grain Size and Distribution on Mechanical Behavior of Dune Sand

Boudia

Berga

2021

Civ Eng J

View full text Add to dashboard Cite

show abstract

Mechanical response of a cemented soil over a wide range of porosities and cement contents

Filho

Consoli

2022

Proceedings of the Institution of Civil Engineers - Ground Impr

View full text Add to dashboard Cite

The adjusted porosity/cement index η/(Civ)a has been showing its usefulness in modelling the strength and stiffness of a variety of artificially cemented soils as it encompasses into a single parameter both the influences of the compactness and of the cement content. That being so, it is theoretically possible to obtain the same mechanical response by establishing a specific η/(Civ)a value, which could be attained by several combinations of porosities and cement contents. Yet, this has not been verified over a wide spectrum of different dosages molded at the same η/(Civ)a value, especially for stiffness data. As a reason, present study addresses this issue by assessing the initial shear modulus and the unconfined compression of different dosages of an artificially cemented soil considering seven η/(Civ)avalues. A minimum of three mix designs were molded within each η/(Civ)a and five specimens were tested for each dosage. Both the stiffness and the strength results were evaluated through Tukey's multiple comparisons tests aiming to check for statistical equivalence of the obtained results within the same η/(Civ)a value. The tests results have revealed statistical differences amongst some dosages assembled with the same adjusted porosity/cement index value. Yet, both the stiffness and the strength outcomes were properly correlated to the η/(Civ)a index, yielding power-type relationships presenting great coefficients of determination.

show abstract

Unconfined compression strength of an artificially cemented aeolian dune sand of Natal/Brazil

Cited by 2 publications

References 15 publications

Effect of Grain Size and Distribution on Mechanical Behavior of Dune Sand

Effect of Grain Size and Distribution on Mechanical Behavior of Dune Sand

Mechanical response of a cemented soil over a wide range of porosities and cement contents

Contact Info

Product

Resources

About