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Dr John McDougall's Outputs (42)

An Innovative Approach to Geotechnical Seismic Isolation: Rubber-Soil Mixture Trenches (2024)
Presentation / Conference Contribution
Bernal-Sanchez, J., Mcdougall, J., Barreto, D., Dimitriadi, V., Leak, J., & Nseabasi, M. (2024, June). An Innovative Approach to Geotechnical Seismic Isolation: Rubber-Soil Mixture Trenches. Presented at 18th World Conference on Earthquake Engineering, Milan, Italy

This study presents a Geotechnical Seismic Isolation (GSI) system proposed for utilising Rubber-Soil mixtures (RSm) to enhance the dynamic performance of a modified soil and foundation structure. The inclusion of RSm enables the system to exhibit low... Read More about An Innovative Approach to Geotechnical Seismic Isolation: Rubber-Soil Mixture Trenches.

Dynamic Behaviour of a Geotechnical Seismic Isolation System with Rubber-Sand Mixtures to Enhance Seismic Protection (2022)
Presentation / Conference Contribution
Bernal-Sanchez, J., McDougall, J., Miranda-Manzanares, M., & Barreto, D. (2022, September). Dynamic Behaviour of a Geotechnical Seismic Isolation System with Rubber-Sand Mixtures to Enhance Seismic Protection. Presented at 3rd European Conference on Earthquake Engineering & Seismology, Bucharest, Romania

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.

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.

Numerical modeling of coupled biochemical and thermal behavior of municipal solid waste in landfills (2020)
Journal Article
Kumar, G., Reddy, K. R., & McDougall, J. (2020). Numerical modeling of coupled biochemical and thermal behavior of municipal solid waste in landfills. Computers and Geotechnics, 128, Article 103836. https://doi.org/10.1016/j.compgeo.2020.103836

A coupled bio-thermal (BT) model is proposed and validated for the prediction of long-term biochemical and thermal behavior of municipal solid waste (MSW) in landfills. The biochemical and thermal behavior of the waste was modeled using a two-stage a... Read More about Numerical modeling of coupled biochemical and thermal behavior of municipal solid waste in landfills.

Grading entropy coordinates and criteria for evaluation of liquefaction potential (2019)
Presentation / Conference Contribution
Barreto Gonzalez, D., Leak, J., Dimitriadi, V., McDougall, J., Imre, E., & Lőrincz, J. (2019, June). Grading entropy coordinates and criteria for evaluation of liquefaction potential. Presented at 7th International Conference on Earthquake Geotechnical Engineering, Rome, Italy

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.

Experimental assessment of stiffness and damping in rubber-sand mixtures at various strain levels (2019)
Presentation / Conference Contribution
Bernal-Sanchez, J., Mcdougall, J., Barreto, D., Marinelli, A., Dimitriadi, V., Anbazhagan, P., & Miranda, M. (2019, June). Experimental assessment of stiffness and damping in rubber-sand mixtures at various strain levels. Presented at 7th International Conference on Geotechnical Earthquake Engineering, Rome

The dynamic properties of shredded rubber-soil mixtures (ShRm), comprising a sub-rounded quartz sand combined with small rubber shreds at 0, 10, 20, 30% by mass, were investigated. Testing ranged from small strain, in resonant column apparatus, to la... Read More about Experimental assessment of stiffness and damping in rubber-sand mixtures at various strain levels.

Particle-scale interaction in sand-rubber mixtures and their influence on energy dissipation mechanisms (2019)
Journal Article
Fonseca, J., Riaz, A., Bernal-Sanchez, J., Barreto Gonzalez, D., McDougall, J., Miranda Manzanares, M., Marinelli, A., & Dimitriadi, V. (2019). Particle-scale interaction in sand-rubber mixtures and their influence on energy dissipation mechanisms. Géotechnique Letters, 9(4), 1-6. https://doi.org/10.1680/jgele.18.00221

Sand-rubber mixture (SRm) behaviour is affected by rubber content (RC) whilst dissipation in sands is caused by inter-particle sliding. Dissipation in SRm is as, or more significant than in sands. However, the mechanisms of dissipation in SRm are not... Read More about Particle-scale interaction in sand-rubber mixtures and their influence on energy dissipation mechanisms.

Particle loss: An initial investigation into size effects and stress-dilatancy (2019)
Journal Article
McDougall, J., Kelly, D., & Barreto, D. (2019). Particle loss: An initial investigation into size effects and stress-dilatancy. Soils and Foundations, https://doi.org/10.1016/j.sandf.2019.03.002

Drained triaxial tests have been performed to explore the effect of particle loss on shearing behaviour and critical states in granular mixtures. The mixtures comprise Leighton Buzzard sand (d50 = 0.8 mm), to which was added 15% by mass of salt parti... Read More about Particle loss: An initial investigation into size effects and stress-dilatancy.

Dynamic behaviour of shredded rubber soil mixtures (2018)
Presentation / Conference Contribution
Bernal-Sanchez, J., McDougall, J., Barreto Gonzalez, D., Miranda, M., & Marinelli, A. (2018, June). Dynamic behaviour of shredded rubber soil mixtures. Presented at 16th European Conference on Earthquake Engineering, Thessaloniki

Residential buildings in high population density areas are seismically vulnerable to the action of major seismic events. The high cost and technical difficulties related to the use of advanced seismic isolations systems precludes its installation to... Read More about Dynamic behaviour of shredded rubber soil mixtures.

Waste-composition-dependent HBM model parameters based on degradation experiments (2018)
Journal Article
Datta, S., Zekkos, D., Fei, X., & McDougall, J. (2021). Waste-composition-dependent HBM model parameters based on degradation experiments. Environmental Geotechnics, 8(2), 124-133. https://doi.org/10.1680/jenge.18.00014

Municipal solid waste (MSW) is biodegradable in landfills under anaerobic conditions. The evolution of the hydro-biochemical-mechanical (HBM) processes during degradation is investigated first through experiments and subsequently via modelling. Thr... Read More about Waste-composition-dependent HBM model parameters based on degradation experiments.

Strategies for One Dimensional (1D) Compression Testing of Large-Particle-Sized Tire Derived Aggregate (2018)
Journal Article
Adesokan, D., Fleming, I., Hammerlindl, A., & McDougall, J. (2019). Strategies for One Dimensional (1D) Compression Testing of Large-Particle-Sized Tire Derived Aggregate. Geotechnical Testing Journal, 42(5), 1336-1358. https://doi.org/10.1520/gtj20170091

Laboratory testing of a mass of large particle sized Tire Derived Aggregate (TDA) to assess performance related properties such as void ratio, compressive creep and hydraulic conductivity under large loads poses a number of experimental challenges. L... Read More about Strategies for One Dimensional (1D) Compression Testing of Large-Particle-Sized Tire Derived Aggregate.

Estimating degradation-related settlement in two landfill-reclaimed soils by sand-salt analogues (2018)
Journal Article
McDougall, J., Fleming, I., Thiel, R., Dewaele, P., Parker, D., & Kelly, D. (2018). Estimating degradation-related settlement in two landfill-reclaimed soils by sand-salt analogues. Waste Management, https://doi.org/10.1016/j.wasman.2018.04.013

Landfill reclaimed soil here refers to largely degraded materials excavated from old landfill sites, which after processing can be reinstated as more competent fill, thereby restoring the former landfill space. The success of the process depends on... Read More about Estimating degradation-related settlement in two landfill-reclaimed soils by sand-salt analogues.

Experimental Assessment and Modelling of Coupled Biochemical-Physical-Mechanical Biodegradation Process of a Municipal Solid Waste Sample from Michigan (2017)
Presentation / Conference Contribution
Datta, S., Zekkos, D., Fei, X., & McDougall, J. (2017, September). Experimental Assessment and Modelling of Coupled Biochemical-Physical-Mechanical Biodegradation Process of a Municipal Solid Waste Sample from Michigan. Presented at Coupled Phenomena in Environmental Geotechnics, Leeds

Municipal solid waste (MSW) is biodegradable in landfills under anaerobic conditions. The evolution of the biochemical, physical and mechanical characteristics of MSW are interdependent and is investigated first through an experiment and subsequently... Read More about Experimental Assessment and Modelling of Coupled Biochemical-Physical-Mechanical Biodegradation Process of a Municipal Solid Waste Sample from Michigan.

Review and application of a settlement model for landfills (2017)
Presentation / Conference Contribution
Esteban-Altabella, J., McDougall, J., Colomer-Mendoza, F., Gallardo, A., & Edo-Alcon, N. (2017, October). Review and application of a settlement model for landfills. Presented at 16TH International Waste Management and Landfill Symposium Sardinia 2017

The geotechnical behavior and settlement in landfills has been changing for many years. This behavior in fact depends on many factors and, therefore, making forecasts is complicated due to the effect of biodegradation. In order to solve this issue, m... Read More about Review and application of a settlement model for landfills.

An overview of research activities and achievement in Geotechnics from the Scottish Universities Geotechnics Network (SUGN) (2015)
Presentation / Conference Contribution
Leung, A., Anastasopoulos, I. X., Augarde, C. E., Barreto, D., Brennan, A. J., Brown, M. J. Z., Connolly, D., Coombs, W. M., Davies, T., Gao, Z., Ivanovic, A., Kenny, M., Knappett, J. A., Lombardi, D., McDougall, J., Medero, G., Muir Wood, D., El Mountassir, G., Osman, A. S., Pytharouli, S., …Zielinski, M. (2015, September). An overview of research activities and achievement in Geotechnics from the Scottish Universities Geotechnics Network (SUGN). Presented at 16th European Conference on Soil Mechanics and Geotechnical Engineering, Edinburgh

Design of geotechnical systems is often challenging as it requires the understanding of complex soil behaviour and its influence on field-scale performance of geo-structures. To advance the scientific knowledge and the technological development in ge... Read More about An overview of research activities and achievement in Geotechnics from the Scottish Universities Geotechnics Network (SUGN).

Mass loss and volume change: From sand-salt analogues to MSW (2013)
Book Chapter
McDougall, J., Fleming, I., Thiel, R., Dewaele, P., Parker, D., & Kelly, D. (2013). Mass loss and volume change: From sand-salt analogues to MSW. In G. Musso (Ed.), Coupled Phenomena in Environmental Geotechnics (189-197). CRC Press. https://doi.org/10.1201/b15004-19

Results from two sets of laboratory test programmes on sand-salt mixtures in wihch the salt fractions, of different amounts and size, are dissolved are brought together to gather insight into the mechanics of mass loss and its controlling factors. Th... Read More about Mass loss and volume change: From sand-salt analogues to MSW.

Volumetric consequences of particle loss by grading entropy (2013)
Journal Article
McDougall, J., Imre, E., Barreto, D., & Kelly, D. (2013). Volumetric consequences of particle loss by grading entropy. Géotechnique, 63(3), 262-266. https://doi.org/10.1680/geot.sip13.t.002

Chemical and biological processes, such as dissolution in gypsiferous sands and biodegradation in waste refuse, result in mass or particle loss, which in turn lead to changes in solid and void phase volumes and grading. Data on phase volume and gradi... Read More about Volumetric consequences of particle loss by grading entropy.

Particle loss and volume change on dissolution: experimental results and analysis of particle size and amount effects (2013)
Journal Article
McDougall, J., Kelly, D., & Barreto, D. (2013). Particle loss and volume change on dissolution: experimental results and analysis of particle size and amount effects. Acta geotechnica, 8(6), 619-627. https://doi.org/10.1007/s11440-013-0212-0

Soil particles may be lost through dissolution, degradation or erosion. Regardless of the process of loss, there follows a change in soil structure both in terms of phase composition and grading. In this paper, the influence of size and amount of par... Read More about Particle loss and volume change on dissolution: experimental results and analysis of particle size and amount effects.

Effect of particle loss on soil behaviour. (2012)
Presentation / Conference Contribution
Kelly, D., McDougall, J., & Barreto, D. (2012, August). Effect of particle loss on soil behaviour. Paper presented at ICSE-6 6th International Conference on Scour and Erosion

Soil particle loss can result in strength and volume reductions which are difficult to predict. This paper investigates the
influence of the removal of fractions of selected particle sizes under different confining pressures. The mass loss
process... Read More about Effect of particle loss on soil behaviour..