The Effect of End Restraint on Volume Change and Particle Breakage of Sands in Triaxial Tests

Comparative drained triaxial tests at high confining pressures were carried out on a strong- and weak-grained granular material with 'rough' and 'lubricated' ends. The results indicated that the stress-strain relationships are significantly influenced by the end conditions. The use of 'lubricated' ends for high pressure tests results in much more uniform distribution of stress, strain, volume change, and crushing of particles throughout the samples.

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Experimental study on particle breakage of carbonate gravels under cyclic loadings through Large-scale triaxial tests

Transportation Geotechnics ◽

10.1016/j.trgeo.2021.100632 ◽

2021 ◽

pp. 100632

Author(s):

Zhigang Cao ◽

Jiaji Chen ◽

Xingchi Ye ◽

Chuan Gu ◽

Zhen Guo ◽

...

Keyword(s):

Experimental Study ◽

Large Scale ◽

Particle Breakage ◽

Triaxial Tests

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Small-strain behaviour and crushability of Ballyconnelly carbonate sand under monotonic and cyclic loading

Canadian Geotechnical Journal ◽

10.1139/cgj-2016-0522 ◽

2018 ◽

Vol 55 (7) ◽

pp. 979-987 ◽

Cited By ~ 5

Author(s):

S. Nanda ◽

V. Sivakumar ◽

S. Donohue ◽

S. Graham

Keyword(s):

Cyclic Loading ◽

Large Scale ◽

Sea Water ◽

High Stress ◽

Small Strain ◽

Offshore Structures ◽

Particle Breakage ◽

Triaxial Tests ◽

Bender Element ◽

Carbonate Sand

In various parts of the globe, carbonate sands are found at shallow sea water depth. These types of sands are very susceptible to large-scale particle breakage. Offshore structures like wind turbines and sea defences are constructed on these types of soils. From a design perspective, it is essential to assess the extent of particle breakage and the subsequent change in soil properties that occur under working load conditions. This paper presents the data obtained from a number of drained monotonic and cyclic triaxial tests on crushable carbonate sand (“Ballyconnelly sand”) in conjunction with small-strain shear stiffness (Gmax) measurements using the bender element technique. The soils were allowed to shear under three different loading patterns to understand the factors influencing the breakage of particles. The degree of crushing was quantified and analysed based on the total energy input. It was observed that, apart from applied stress, the total strain accumulation governs the amount of particle breakage. It was observed that Gmax increased significantly under high stress ratio. Gmax also increased noticeably during resting periods without any change in loading conditions as a result of creep, and subsequently during cyclic loading although at a reduced rate.

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Particle Breakage of Rockfill Material during Triaxial Tests under Complex Stress Paths

International Journal of Geomechanics ◽

10.1061/(asce)gm.1943-5622.0001517 ◽

2019 ◽

Vol 19 (12) ◽

pp. 04019124 ◽

Cited By ~ 8

Author(s):

Yufeng Jia ◽

Bin Xu ◽

Shichun Chi ◽

Biao Xiang ◽

Dai Xiao ◽

...

Keyword(s):

Complex Stress ◽

Particle Breakage ◽

Triaxial Tests ◽

Rockfill Material

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Measuring total volumetric strains during triaxial tests on frozen soils: a new approach

Canadian Geotechnical Journal ◽

10.1139/t78-004 ◽

1978 ◽

Vol 15 (1) ◽

pp. 47-53 ◽

Cited By ~ 7

Author(s):

M. J. O'Connor ◽

R. J. Mitchell

Keyword(s):

Volume Change ◽

Deformation Rate ◽

Sample Volume ◽

Triaxial Tests ◽

Fluid Level ◽

Frozen Soils ◽

New Approach ◽

Triaxial Cell ◽

Rate Controlled ◽

Theoretical Accuracy

A triaxial cell has been modified to permit measurement of volumetric strains during deformation-rate-controlled and stress-controlled triaxial tests on frozen soils. In the system described here, a volume change in the soil sample alters the level of fluid in the triaxial cell. The fluid level can be monitored during the test using a sloping tube volumeter. Theoretical accuracy with this arrangement can exceed 0.1% of the sample volume.

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