Results 201 to 210 of about 6,279 (248)
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A Large-Scale Triaxial Apparatus for Prototype Railroad Ballast Testing
Geotechnical Testing Journal, 2009Abstract Shear strength and compressibility of large grain-size materials are critical parameters for the geotechnical design of road bases, rock fill embankments, and railroad sub-base. However, due to the correspondingly large scale of triaxial specimens necessary for rock-fill and railroad ballast material testing, the numbers of ...
Adam F. Sevi, Louis Ge, W. Andy Take
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Large-scale triaxial compression tests of geocell-reinforced sand
Geosynthetics International, 2019A series of large-scale triaxial compression tests were performed on sandy soil confined by a circular geocell in this study. The effects of the relative density of the infill sand, the stiffness and strength of the geocell, and the aspect ratio (height-to-diameter ratio) of the specimen on the overall behavior of the geocell-soil composite were ...
F. Song, H. Liu, B. Yang, J. Zhao
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Drained response of municipal solid waste in large-scale triaxial shear testing
Waste Management, 2012A comprehensive laboratory investigation was performed on municipal solid waste (MSW) from a landfill located in northern California using a large-scale triaxial (TX) apparatus. An improved, standardized waste specimen preparation method was developed and used to prepare 27 large-scale TX specimens (d=300 mm, h=600-630 mm).
Dimitrios, Zekkos +2 more
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Large-scale triaxial tests of vegetated soil at low confining stresses
2022<p>The focus of geotechnical researchers and practitioners has recently been on the impact of vegetation on the mechanical behaviour of the soil as nature-based techniques against erosion and landslides. Although numerous laboratory studies have already been produced on this subject, there seems to be a lack of discussion on the ...
Alessandro Fraccica +2 more
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Large-Scale Triaxial Tests on Railway Embankment Material
2018Large-scale vacuum triaxial tests were performed as a part of the European project SUPERTRACK. The triaxial specimen dimensions were large enough to allow testing of large-grained railway ballast material. Two different materials were tested—ballast (two tests) and sub-ballast (one test).
Rune Dyvik, Amir M. Kaynia
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Simulating Ballast Shear Strength from Large-Scale Triaxial Tests
Transportation Research Record: Journal of the Transportation Research Board, 2013The railroad ballast layer consists of discrete aggregate particles, and the discrete element method (DEM) is the most widely adopted numerical method to simulate the particulate nature of ballast materials and their particle interactions. Large-scale triaxial tests performed in the laboratory under controlled monotonic and repeated loading conditions ...
Yu Qian +5 more
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Review of Size and Loading Conditions for Large-Scale Triaxial Testing
2018The large particle size of railroad ballast and the wide range of loading conditions make it difficult to appropriately represent ballast behavior in laboratory shear testing. This paper presents an overview of the advantages and disadvantages of large-scale triaxial compression testing of ballast, how it can be used to represent field ballast ...
Timothy D. Stark +2 more
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Shear Behavior of Railway Ballast Based on Large-Scale Triaxial Tests
Journal of Geotechnical and Geoenvironmental Engineering, 1998Quarried rock fragments (ballast) constitute one of the most commonly used construction materials in railway engineering practice. Ballast is subjected to high stress levels as well as being always exposed to environmental changes. Unsatisfactory performance of railway tracks is often associated with the loss of cross level, track profile and track ...
B. Indraratna +2 more
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Large-Scale True Triaxial Test on Stress-Strain and Strength Properties of Rockfill
International Journal of Geomechanics, 2020AbstractLimited by the particle size requirements of testing apparatus, little true triaxial test (TTT) research on rockfill has been conducted.
Jiajun Pan +4 more
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Development of an empirical hyperbolic material model for TDA utilizing large-scale triaxial testing
International Journal of Geotechnical Engineering, 2021There is a growing interest in reusing scrap tires in civil engineering applications. Previous studies have shown that there are many promising applications in civil engineering.
Hany El Naggar +2 more
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