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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.

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.

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.

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.

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.

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..

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