Triaxial Tests on Weakly Bonded Soil with Changes in Stress Path

Malandraki, V.; Toll, D. G.

doi:10.1061/(asce)1090-0241(2001)127:3(282)

Cited by 59 publications

(24 citation statements)

References 6 publications

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“…The volumetric strain response for the 22 dilative samples exhibited initial contraction followed by signiˆcant dilation, and the amount of initial contraction increased with cement content for a given density and conˆning stress. In general the observed behavior of these samples during drained shear is consistent with other published results on cemented soils (e.g., Clough et al, 1981; Huang and Airey, 1998; Malandraki and Toll, 2001). …”

Section: Drained Behavior Of Cemented Sandssupporting

confidence: 91%

Relationship between Shear Wave Velocity and Stresses at Failure for Weakly Cemented Sands During Drained Triaxial Compression

Sharma¹,

Baxter

Jander

2011

Soils and Foundations

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Section: Drained Behavior Of Cemented Sandssupporting

confidence: 91%

Relationship between Shear Wave Velocity and Stresses at Failure for Weakly Cemented Sands During Drained Triaxial Compression

Sharma¹,

Baxter

Jander

2011

Soils and Foundations

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“…(ii) Artificially cemented specimens made up by adding a bonding agent to soil materials, such as Portland cement, gypsum, lime, etc. [1,[17][18][19][20][21][22][23][24]. They can also be generated by more complicated processes in which several steps are needed in sequence to form bonding materials [25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

“…The yielding mechanism, the Coop and Willson criteria on weak/strong bonding [15] which will be briefly described in Section 6.2, and the strong bonding phenomenon in Reference [22] are also discussed. Several other features of naturally microstructured sands, such as particle crushing [39,49], fabric [5], anisotropy [23,24], particle shape or grade [1] and strain localization are not discussed.…”

Section: Introductionmentioning

confidence: 99%

A simple and efficient approach to capturing bonding effect in naturally microstructured sands by discrete element method

Jiang

Leroueil

2006

Numerical Meth Engineering

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SUMMARYA discrete element modelling of naturally microstructured sands is very important to geomechanics. This paper presents a simple discrete element model for naturally microstructured sands with the aim to efficiently capture the effect of cementation between particles (bonds). First, a simple bond contact model was proposed by introducing a rigid-plastic bond element into the conventional contact model for dry granular material. Second, efficient numerical techniques were investigated to implement this contact model into the distinct element method (DEM). Then, a two-dimensional DEM code was developed to simulate a series of isotropic compression tests on the materials of different densities and bonding strengths. The study shows that the DEM model is able to capture the main features of naturally microstructured sands, such as variations of yielding and bulk modulus against bonding strength or material density. In addition, it is shown that the gross yielding (the yielding defined in terms of strains) is largely related to bond breakage; Coop and Willson criteria are generally reasonable; and the strong bonding in the experimental data obtained by Rotta et al. comes from that their bonded materials start at different points on the same compression line.

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“…A few examples include Dupas and Pecker [1], Haeri et al [2][3], Hamidi and Haeri [4], Schnaid et al [5], Consoli et al [6][7][8][9][10], Rotta et al [11], and Malandraki and Toll [12]. To study the behavior of clean sands under cyclic loads like earthquake, SSA simulates more realistic stress states.…”

Section: Introductionmentioning

confidence: 99%

Specimen Preparation Methods for Artificially Cemented Sand in Simple Shear and Hollow Cylinder Apparatuses

et al. 2017

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Abstract. Portland cement can be mixed with sand to improve its mechanical characteristics. Considering the inherent anisotropy of most sands, it is not clear whether the added cement shall contribute to equal increases in strength and sti ness in vertical and horizontal directions or not. Literature review reveals that all the previous experimental studies on the cement-treated soil topics are limited to conventional triaxial device test results. The e ect of cement addition to clean sand in more sophisticated stress-path controlled devices like \Simple Shear Apparatus" (SSA) and \Hollow Cylinder Apparatus" (HCA) for simulating more realistic loading conditions, such as earthquake, have not been investigated yet. This paper presents innovative methods for testing arti cially cemented sands through making modi cations to the loading platens, specimen molds, and specimen preparation methods of SSA and HCA. Undrained tests under di erent monotonic stress paths were carried out on di erent mixtures of Portland cement with clean sand to investigate the e ect of principal stress rotations. The test results revealed that the cement mixture reduces the anisotropy, while it improves the mixture mechanical properties compared to the compacted uncemented sand.

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Triaxial Tests on Weakly Bonded Soil with Changes in Stress Path

Cited by 59 publications

References 6 publications

Relationship between Shear Wave Velocity and Stresses at Failure for Weakly Cemented Sands During Drained Triaxial Compression

Relationship between Shear Wave Velocity and Stresses at Failure for Weakly Cemented Sands During Drained Triaxial Compression

A simple and efficient approach to capturing bonding effect in naturally microstructured sands by discrete element method

Specimen Preparation Methods for Artificially Cemented Sand in Simple Shear and Hollow Cylinder Apparatuses

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