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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.

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)
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.

Experimental assessment of stiffness and damping in rubber-sand mixtures at various strain levels (2019)
Conference Proceeding
Bernal-Sanchez, J., Mcdougall, J., Barreto, D., Marinelli, A., Dimitriadi, V., Anbazhagan, P., & Miranda, M. (2019). Experimental assessment of stiffness and damping in rubber-sand mixtures at various strain levels. In Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions (1403-1410)

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., …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., & Daniel, B. (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)
Conference Proceeding
Bernal-Sanchez, J., McDougall, J., Barreto Gonzalez, D., Miranda, M., & Marinelli, A. (2018). Dynamic behaviour of shredded rubber soil mixtures. In Proceedings of the 16th European Conference in Earthquake Engineering

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)
Conference Proceeding
Datta, S., Zekkos, D., Fei, X., & McDougall, J. (2017). Experimental Assessment and Modelling of Coupled Biochemical-Physical-Mechanical Biodegradation Process of a Municipal Solid Waste Sample from Michigan. In Proceedings of the 2nd Symposium on Coupled Phenomena in Environmental Geotechnics (CPEG2), Leeds, UK 2017

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)
Conference Proceeding
Esteban-Altabella, J., McDougall, J., Colomer-Mendoza, F., Gallardo, A., & Edo-Alcon, N. (2017). Review and application of a settlement model for landfills. In International Waste and Landfill Symposium Proceedings

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)
Conference Proceeding
Leung, A., Anastasopoulos, I. X., Augarde, C. E., Barreto, D., Brennan, A. J., Brown, M. J. Z., …Zielinski, M. (2015). An overview of research activities and achievement in Geotechnics from the Scottish Universities Geotechnics Network (SUGN). In Geotechnical Engineering for Infrastructure and Development: XVI European Conference on Soil Mechanics and Geotechnical Engineering (4289-4294)

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
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..

Settlement-The Short and the Long of it (2011)
Conference Proceeding
McDougall, J. (2011). Settlement-The Short and the Long of it. In D. Zekkos (Ed.), Geotechnical Characterization, Field Measurement, and Laboratory Testing of Municipal Solid Waste (76-111). https://doi.org/10.1061/41146%28395%293

Total settlement in municipal solid waste (MSW) landfills can be considerable, from 25% to 50% of original fill thickness (Bjarngard and Edgers, 1990). Some occurs very quickly, i.e. during the filling phase (or short term), but there remains a signi... Read More about Settlement-The Short and the Long of it.

Waste heterogeneity: an obstacle to models? (2009)
Conference Proceeding
McDougall, J. (2009). Waste heterogeneity: an obstacle to models?. In Sardinia 2009, 12th International Waste Management and Landfill Symposium

No abstract available.

Landfill modelling challenge: HBM modelling predictions (2008)
Journal Article
McDougall, J. (2008). Landfill modelling challenge: HBM modelling predictions. Proceedings of the ICE - Waste and Resource Management, 161, 147-153. https://doi.org/10.1680/warm.2008.161.4.147

Two laboratory-scale consolidating anaerobic reactors were commissioned, constructed and monitored by Southampton University's waste research group to investigate the long-term behaviour of decomposing waste. The reactor tests were run for 919 days w... Read More about Landfill modelling challenge: HBM modelling predictions.

Geomechanics and Long-Term Landfill Settlement (2008)
Conference Proceeding
McDougall, J. (2008). Geomechanics and Long-Term Landfill Settlement. In GeoCongress 2008: Geotechnics of Waste Management and Remediation Proceedings of sessions of GeoCongress 2008 (482-490). https://doi.org/10.1061/40970%28309%2924

Long term landfill settlement is commonly attributed to two phenomena: creep and biodegradation. Biodegradation, which may contribute the greater proportion of long‐term settlement, is a function of a range of factors, many of which are not easily as... Read More about Geomechanics and Long-Term Landfill Settlement.

Assessment of landfill settlement data for evaluation of a hydro-bio-mechanical settlement model. (2007)
Conference Proceeding
Needham, A., Jones, D. R. V., McDougall, J., Dixon, N., Braithwaite, P., & Rosevear, A. (2007). Assessment of landfill settlement data for evaluation of a hydro-bio-mechanical settlement model.

A hydro-bio-mechanical (HBM) model of waste degradation has been under development for several years to simulate the actual processes involved in the settlement of landfilled wastes. The objective of this current research is the further development o... Read More about Assessment of landfill settlement data for evaluation of a hydro-bio-mechanical settlement model..

Sustainable landfill: the role of fail-safe engineering for landfill aftercare. (2007)
Conference Proceeding
Hall, D. H., McDougall, J., Drury, D., Blakey, N., Braithwaite, P., & Rosevear, A. (2007). Sustainable landfill: the role of fail-safe engineering for landfill aftercare.

The route to sustainable landfill while adhering to the Landfill Directive requires that ultimately, the waste site will reach equilibrium status. Chemical equilibrium is part of the requirements, but hydraulic equilibrium must also play a role. The... Read More about Sustainable landfill: the role of fail-safe engineering for landfill aftercare..

A hydro-bio-mechanical model for settlement and other behaviour in landfilled waste. (2007)
Journal Article
McDougall, J. (2007). A hydro-bio-mechanical model for settlement and other behaviour in landfilled waste. Computers and Geotechnics, 34, 229-246. https://doi.org/10.1016/j.compgeo.2007.02.004

A conceptual framework for the analysis of settlement and other processes in landfilled waste in relation to coupled hydraulic, biodegradation and mechanical behaviour is presented. The hydraulic model is an unsaturated flow model. The biodegradation... Read More about A hydro-bio-mechanical model for settlement and other behaviour in landfilled waste..

Unsaturated hydraulic conductivity of landfilled waste. (2006)
Conference Proceeding
Kazimoglu, Y. K., McDougall, J., & Pyrah, I. (2006). Unsaturated hydraulic conductivity of landfilled waste. . https://doi.org/10.1061/40802%28189%29127

Unsaturated flow modelling of landfill hydraulics is a potentially valuable tool for the prediction of leachate discharge rates, design of leachate control systems and simulation of biodegradation in engineered landfills. Such an approach requires in... Read More about Unsaturated hydraulic conductivity of landfilled waste..

Moisture retention and movement in landfilled waste (2005)
Conference Proceeding
Kazimoglu, Y. K., McDougall, J., & Pyrah, I. (2005). Moisture retention and movement in landfilled waste. In Proceedings of the International Conference on Problematic Soils: GEOPRPOB 2005 (307-314)

No abstract available.

Decomposition and settlement in landfilled waste and other soil-like materials (2004)
Journal Article
McDougall, J. R., Pyrah, I. C., Yuen, S. T. S., Monteiro, V. E. D., Melo, M. C., & Jucá, J. F. T. (2004). Decomposition and settlement in landfilled waste and other soil-like materials. Géotechnique, 54(9), 605-609. https://doi.org/10.1680/geot.54.9.605.56937

The term ‘soil-like materials’ is used to refer to particulate materials that contain organic or other non-inert solids. When these materials decompose, there is a reduction in solid phase volume and an induced change in void phase volume, the combin... Read More about Decomposition and settlement in landfilled waste and other soil-like materials.

Phase relations for decomposable soils (2004)
Journal Article
McDougall, J. R., & Pyrah, I. C. (2004). Phase relations for decomposable soils. Géotechnique, 54(7), 487-493. https://doi.org/10.1680/geot.54.7.487.46750

Expressions describing the phase composition and interphase relations for a decomposable soil are derived by distinguishing between inert and decomposable fractions. A relationship between void volume changes and decomposition of the solid fraction,... Read More about Phase relations for decomposable soils.

Extended phase relations and load effects in MSW (2004)
Journal Article
McDougall, J., Pyrah, I., & Yuen, S. T. S. (2004). Extended phase relations and load effects in MSW. Waste Management, 24(3), 251-257. https://doi.org/10.1016/j.wasman.2003.10.009

The moisture retention and compression characteristics of municipal solid waste under self-weight are likened to those of an unsaturated soil. By assuming that the solid organic fraction in waste retains a relatively immobile micropore moisture and t... Read More about Extended phase relations and load effects in MSW.

A biodegradacios hulladektarolas. (2003)
Journal Article
Imre, E., McDougall, J., Farkas, J., Kovacs, M., Czap, Z., Monteiro, V. E. D., & Trang, P. (2003). A biodegradacios hulladektarolas. Journal of the Hungarian Hydrological Society, 83, 374-379

Moisture retention curve in landfilled waste. (2003)
Conference Proceeding
Kazimoglu, Y. K., McDougall, J., & Pyrah, I. (2003). Moisture retention curve in landfilled waste. In Unsaturated Soils: Experimental Studies (59-67). https://doi.org/10.1007/3-540-26736-0_5

Moisture content and moisture movement are key factors in controlling the progress and rate of biodegradation within a landfill as it is the aqueous environment that facilitates the transport of nutrients and microbes. The modelling of infiltration a... Read More about Moisture retention curve in landfilled waste..