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A DEM study on the effect of inherent variability of assemblies of spherical particles (2023)
Conference Proceeding
Leak, J., & Barreto, D. (2023). A DEM study on the effect of inherent variability of assemblies of spherical particles. In Proceedings 10th NUMGE 2023: 10th European Conference on Numerical Methods in Geotechnical Engineering. https://doi.org/10.53243/NUMGE2023-388

This study presents DEM simulations of assemblies of spheres using periodic boundaries to assess the effect of inherent sample variability. DEM specimens with different particle size distributions (PSDs) were randomly generated, and then isotropicall... Read More about A DEM study on the effect of inherent variability of assemblies of spherical particles.

Use of hydraulic radius to estimate the permeability of coarse-grained materials using a new geodatabase (2023)
Journal Article
Feng, S., Barreto, D., Imre, E., Ibraim, E., & Vardanega, P. J. (2023). Use of hydraulic radius to estimate the permeability of coarse-grained materials using a new geodatabase. Transportation Geotechnics, 41, Article 101026. https://doi.org/10.1016/j.trgeo.2023.101026

This paper reviews commonly used parameters and prediction models for assessing permeability of granular soils. Following a review of published models for prediction of soil permeability, a dimensional homogenous transformation model for a-priori est... Read More about Use of hydraulic radius to estimate the permeability of coarse-grained materials using a new geodatabase.

Soil parameters in terms of entropy coordinates (2023)
Conference Proceeding
Imre, E., Firgi, T., Baille, W., Datcheva, M., Barreto, D., Feng, S., & Singh, V. (2023). Soil parameters in terms of entropy coordinates. In 8th International Conference on Unsaturated Soils (UNSAT 2023). https://doi.org/10.1051/e3sconf/202338225003

In the ongoing research, an approximate, grading entropy based, advanced interpolation method is applied to establish empirical functions between the grading curves and the model parameters of sands. The space of the grain size distribution curves wi... Read More about Soil parameters in terms of entropy coordinates.

Rubber-soil mixtures: use of grading entropy theory to evaluate stiffness and liquefaction susceptibility (2023)
Journal Article
Bernal-Sanchez, J., Barreto, D., & Leak, J. (2023). Rubber-soil mixtures: use of grading entropy theory to evaluate stiffness and liquefaction susceptibility. Bulletin of Earthquake Engineering, 21, 3777–3796. https://doi.org/10.1007/s10518-023-01673-3

Rubber-soil mixtures are known to have mechanical properties that enable their use in backfills, road construction or geotechnical seismic isolation systems. The complexity of these mixtures comes from adding soft (i.e. rubber) particles that increas... Read More about Rubber-soil mixtures: use of grading entropy theory to evaluate stiffness and liquefaction susceptibility.

Quantifying Particle Breakage and Its Evolution Using Breakage Indices and Grading Entropy Coordinates (2022)
Journal Article
Leak, J., Barreto, D., Dimitriadi, V., & Imre, E. (2022). Quantifying Particle Breakage and Its Evolution Using Breakage Indices and Grading Entropy Coordinates. Geotechnics, 2(4), 1109-1126. https://doi.org/10.3390/geotechnics2040052

Particle breakage in soils is a well-recognised behaviour. Conventional methods for quantifying the breakage process rely on calculating the area between the particle size distribution (PSD) curves produced before and after crushing. A key aspect of... Read More about Quantifying Particle Breakage and Its Evolution Using Breakage Indices and Grading Entropy Coordinates.

Dynamic Behaviour of a Geotechnical Seismic Isolation System with Rubber-Sand Mixtures to Enhance Seismic Protection (2022)
Conference Proceeding
Bernal-Sanchez, J., McDougall, J., Miranda-Manzanares, M., & Barreto, D. (2022). Dynamic Behaviour of a Geotechnical Seismic Isolation System with Rubber-Sand Mixtures to Enhance Seismic Protection. In Proceedings of the 3rd European Conference on Earthquake Engineering & Seismology (2674-2683)

A Geotechnical Seismic Isolation (GSI) system is proposed in this study based on the use of Rubber-Soil mixtures (RSm) to facilitate the benefits of dynamic soil-foundation structure interaction. The latter is possible due to the lower stiffness and... Read More about Dynamic Behaviour of a Geotechnical Seismic Isolation System with Rubber-Sand Mixtures to Enhance Seismic Protection.

Recent Advances in Nature-Inspired Solutions for Ground Engineering (NiSE) (2021)
Journal Article
Assadi-Langroudi, A., O’Kelly, B. C., Barreto, D., Cotecchia, F., Dicks, H., Ekinci, A., …van Paassen, L. (2022). Recent Advances in Nature-Inspired Solutions for Ground Engineering (NiSE). International Journal of Geosynthetics and Ground Engineering, 8(1), Article 3. https://doi.org/10.1007/s40891-021-00349-9

The ground is a natural grand system; it is composed of myriad constituents that aggregate to form several geologic and biogenic systems. These systems operate independently and interplay harmoniously via important networked structures over multiple... Read More about Recent Advances in Nature-Inspired Solutions for Ground Engineering (NiSE).

A DEM Study On The Effect Of Inherent Variability In Assemblies Of Spherical Particles (2021)
Presentation / Conference
Leak, J., Barreto, D., & Dimitriadi, V. (2021, December). A DEM Study On The Effect Of Inherent Variability In Assemblies Of Spherical Particles. Paper presented at 18th Annual Geomechanics From Micro to Macro Conference, Dundee

These slides were presented at the 18th annual geomechanics from micro to macro conference in 2021 at the university of Dundee. They detail a study on the effect of inherent variability on soil parameters (such as initial void ratio, peak stress etc.... Read More about A DEM Study On The Effect Of Inherent Variability In Assemblies Of Spherical Particles.

Some Notes on Granular Mixtures with Finite, Discrete Fractal Distribution (2021)
Journal Article
Imre, E., Talata, I., Barreto, D., Datcheva, M., Baille, W., Georgiev, I., …Lőrincz, J. (2022). Some Notes on Granular Mixtures with Finite, Discrete Fractal Distribution. Periodica Polytechnica Civil Engineering, 66(1), 179-192. https://doi.org/10.3311/ppci.19103

Why fractal distribution is so frequent? It is true that fractal dimension is always less than 3? Why fractal dimension of 2.5 to 2.9 seems to be steady-state or stable? Why the fractal distributions are the limit distributions of the degradation pat... Read More about Some Notes on Granular Mixtures with Finite, Discrete Fractal Distribution.

Examination of saturated hydraulic conductivity using grading curve functions (2021)
Conference Proceeding
Imre, E., Bálint, E. Á., Nagy, L., Lőrincz, J., Illés, Z., Barreto, D., …Feng, S. (2021). Examination of saturated hydraulic conductivity using grading curve functions. In Proceedings of the 6th International Conference on Geotechnical and Geophysical Site Characterization

In a previous research program 74 artificial soil mixtures of natural fluvial soils were prepared in 4 series of measurements for falling head permeability testing, differing in d 10. The conclusions drawn from the original investigations were as fol... Read More about Examination of saturated hydraulic conductivity using grading curve functions.

Housing Construction On Peatland: Phase 1 Report (2021)
Report
Bernal-Sanchez, J., McDougall, J., Medero, G., Cook, D., & Barreto, D. (2021). Housing Construction On Peatland: Phase 1 Report. Edinburgh: Construction Scotland Innovation Centre

The economic development and social resilience of communities in rural Scotland is being hampered by a shortage of affordable housing. Nationally, about 23,000 new homes per year are needed, whilst in the year up to October 2018, only 18,000 were bui... Read More about Housing Construction On Peatland: Phase 1 Report.

Revisiting Hardin’s parameters for the quantification of particle breakage – A statistical entropy approach (2021)
Conference Proceeding
Leak, J., Barreto, D., Dimitriadi, V., & Imre, E. (2021). Revisiting Hardin’s parameters for the quantification of particle breakage – A statistical entropy approach. In Powders & Grains 2021 – 9th International Conference on Micromechanics on Granular Media. https://doi.org/10.1051/epjconf/202124907001

It is well recognised that particle breakage in granular materials is affected by stress level, stress path, initial density, and particle size distribution (PSD), amongst others. Furthermore, it has been shown that breakage has a significant influen... Read More about Revisiting Hardin’s parameters for the quantification of particle breakage – A statistical entropy approach.

A guide to modeling the geotechnical behavior of soils using the discrete element method (2021)
Book Chapter
Barreto Gonzalez, D., & Leak, J. (2021). A guide to modeling the geotechnical behavior of soils using the discrete element method. In P. Samui, S. Kumari, V. Makarov, & P. Kurup (Eds.), Modeling in geotechnical engineering (79-100). London: Elsevier. https://doi.org/10.1016/B978-0-12-821205-9.00016-2

This article describes the discrete element method (DEM) for the modeling of the geotechnical behavior of soils. Emphasis is made on a description of the algorithms and capabilities of the method rather than on the implementation details and equation... Read More about A guide to modeling the geotechnical behavior of soils using the discrete element method.

Quantification of Particle Breakage & its Evolution using Statistical Entropy- A Grading Entropy Approach (2020)
Presentation / Conference
Leak, J., Barreto, D., Dimitriadi, V., & Imre, E. (2020, December). Quantification of Particle Breakage & its Evolution using Statistical Entropy- A Grading Entropy Approach. Paper presented at 17th Annual Geomechanics From Micro to Macro Conference, Online

These slides were presented at the 17th annual geomechanics from micro to macro conference in 2020. They detail the comparison of the well known, and commonly used, relative breakage parameter used to assess the degree of particle breakage in soils.... Read More about Quantification of Particle Breakage & its Evolution using Statistical Entropy- A Grading Entropy Approach.

The Saturated Hydraulic Conductivity Of 2-Fraction Granular Soils And The Internal Stability (2020)
Conference Proceeding
Imre, E., Illés, Z., Bálint, Á., Barreto, D., Khaliunaa, A., Tsendsuren, B., …Lizeth Guadalupe, L. L. (2020). The Saturated Hydraulic Conductivity Of 2-Fraction Granular Soils And The Internal Stability. In Proceedinngs Book of 11th ICEEE – 2020 Conference (267-274)

The four grading entropy coordinates can be used for soil classification on the basis of grain size and the grading curve shape (similarly e.g., to the diameter values). The grading entropy coordinates give information on several basic Physics featur... Read More about The Saturated Hydraulic Conductivity Of 2-Fraction Granular Soils And The Internal Stability.

Grading entropy coordinates and criteria for evaluation of liquefaction potential (2019)
Conference Proceeding
Barreto Gonzalez, D., Leak, J., Dimitriadi, V., McDougall, J., Imre, E., & Lőrincz, J. (2019). Grading entropy coordinates and criteria for evaluation of liquefaction potential. In Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions (1346-1353). https://doi.org/10.1201/9780429031274

Several methods are commonly used for the evaluation of liquefaction potential in soils. These include criteria based on SPT and CPT tests, shear wave velocity measurements and gradation limits, amongst others. This study applies the concept of gradi... Read More about Grading entropy coordinates and criteria for evaluation of liquefaction potential.

Grading curves and internal stability (2019)
Conference Proceeding
Imre, E., Barreto, D., Talata, I., Baille, W., Rahemi, N., Goudarzy, M., …Singh, V. (2019). Grading curves and internal stability.

The measured grading curve is an empirical distribution function, a step function. This is considered here as a discrete distribution with fixed statistical cells. In the grading entropy theory it is characterized by the... Read More about Grading curves and internal stability.

Preliminary study on the relationship between dry density of sands and the grading entropy parameters (2019)
Conference Proceeding
Imre, E., Lorincz, J., Trang, P., Csonka, I., Kaczvinszki-Szabó, V., Telekes, G., …Singh, V. (2019). Preliminary study on the relationship between dry density of sands and the grading entropy parameters. In XVII European Conference on Soil Mechanics and Geotechnical Engineering: Conference proceedings. https://doi.org/10.32075/17ECSMGE-2019-0996

Some earlier data were analysed, searching the relation between the minimum dry density emax and the two grading entropy parameters (mean log diameter and fraction number characteristic). The data were split into two components. The first... Read More about Preliminary study on the relationship between dry density of sands and the grading entropy parameters.