Structure-based hydro-mechanical properties of sand-bentonite composites

Article


Ghadr, Soheil and Assadi Langroudi, A. 2018. Structure-based hydro-mechanical properties of sand-bentonite composites. Engineering Geology. 235, pp. 53-63. https://doi.org/10.1016/j.enggeo.2018.02.002
AuthorsGhadr, Soheil and Assadi Langroudi, A.
Abstract

For the geological disposal of highly contaminated wastes, medical or other sorts, clay barrier systems are commonly designed and used. The engineered liners contain buffer material which is often carefully proportioned mixtures of pure bentonite and sand. Bentonite is an active clay mineral with very low hydraulic conductivity and extremely high expansive properties, which benefits in controlling the downward migration of hazardous contaminants to groundwater. In the design of such composite buffer geomaterial, deformation and pore-flow analysis is a pivotal matter and has therefore been thoroughly investigated in the decades past. When unsaturated, the coupling hydraulic-mechanical behaviour of sand-bentonite mixtures are complex. Among possible reasons behind this complex behaviour is the dependency of hydraulic hysteresis and consolidation properties on size, shape and sorting of solids and pores in the soil's skeleton, which are also rarely accounted for in most of the commonly used soil models.

In this contribution, the hydro-mechanical behaviour of saturated and unsaturated sand-bentonite soil is investigated in the context of the recently developed Concept of Double Porosity (CDP). The geomaterial under study is assumed to consist of an incompressible, rigid, elastic solid skeleton surrounded by viscous water and gas fluids, and connected via a network of elastoplastic clayey bridge/buttress units. Roundness and sorting are varied for the sand constituent. The clay fraction (CF) is also varied across testing specimens. The experimental work here introduces two micromechanical models (small clay and large clay) which facilitates interpretation of macro-scale coupled hydromechanical behaviour of composite sand-bentonite geomaterials. The findings from this work will aid design practitioners through a tentative decision support system proposed in closing remarks.

JournalEngineering Geology
Journal citation235, pp. 53-63
ISSN00137952
Year2018
PublisherElsevier
Accepted author manuscript
License
Digital Object Identifier (DOI)https://doi.org/10.1016/j.enggeo.2018.02.002
Web address (URL)https://doi.org/10.1016/j.enggeo.2018.02.002
Publication dates
Online06 Feb 2018
Publication process dates
Deposited07 Feb 2018
Accepted04 Feb 2018
Accepted04 Feb 2018
Permalink -

https://repository.uel.ac.uk/item/848zv

Download files


Accepted author manuscript
Ghadr_Assadi-Langroudi.pdf
License: CC BY-NC-ND 4.0

  • 210
    total views
  • 405
    total downloads
  • 2
    views this month
  • 5
    downloads this month

Export as

Related outputs

Understanding the complexity of materials procurement in construction projects to build a conceptual framework influencing supply chain management of MSMEs
Donyavi, S., Flanagan, R., Assadi-Langroudi, A. and Parisi, L. 2024. Understanding the complexity of materials procurement in construction projects to build a conceptual framework influencing supply chain management of MSMEs. International Journal of Construction Management. 24 (2), pp. 177-186. https://doi.org/10.1080/15623599.2023.2267862
Replacing C₃S Cement with PP Fibre and Nanobiosilica in Stabilisation of Organic Clays
Ghadr, S., Assadi Langroudi, A. and Bahadori, H. 2023. Replacing C₃S Cement with PP Fibre and Nanobiosilica in Stabilisation of Organic Clays. Geomechanics and Engineering. 34 (4), pp. 401-414. https://doi.org/10.12989/gae.2023.33.4.401
Optimising the use of Materials for Construction MSMEs: Building a Comprehensive Framework for Decision-Making and Resource Allocation through an Analytic Hierarchy Process
Donyavi, S., Flanagan, R., Assadi-Langroudi, A. and Parisi, L. 2023. Optimising the use of Materials for Construction MSMEs: Building a Comprehensive Framework for Decision-Making and Resource Allocation through an Analytic Hierarchy Process. International Journal of Construction Supply Chain Management (IJCSCM). 13 (1), pp. 50-74.
Loess in Britain and Ireland: Formation, modification and environmental significance, a review in memory of John Catt (1937–2017)
Bunce, C., Smalley, I., Stevens, T. and Assadi Langroudi, A. 2022. Loess in Britain and Ireland: Formation, modification and environmental significance, a review in memory of John Catt (1937–2017). Proceedings of the Geologists' Association. 133 (6), pp. 501-517. https://doi.org/10.1016/j.pgeola.2022.06.005
Fractals for the Sustainable Design of Engineered Particulate Systems
Assadi Langroudi, A., Abdalla, H. and Ghadr, S. 2022. Fractals for the Sustainable Design of Engineered Particulate Systems. Sustainability. 14 (Art. 7287). https://doi.org/10.3390/su14127287
Recent advances in nature-inspired solutions for ground engineering (NiSE)
Assadi Langroudi, A., O’Kelly, B. C., Barreto, D., Cotecchia, F., Dicks, H., Ekinci, A., Garcia, F. E. T., Harbottle, M., Tagarelli, V., Jefferson, I., Maghoul, P., Masoero, E., Mountassir, G. E., Muhunthan, B., Geng, X., Ghadr, S., Mirzababaei, M., Mitrani, H. and van Paassen, L. 2022. Recent advances in nature-inspired solutions for ground engineering (NiSE). International Journal of Geosynthetics and Ground Engineering. 8 (Art. 3). https://doi.org/10.1007/s40891-021-00349-9
Stabilisation of peat with colloidal nano and micro silica
Ghadr, S. and Assadi Langroudi, A. 2022. Stabilisation of peat with colloidal nano and micro silica. Mires and Peat. 28 (Art. 14). https://doi.org/10.19189/MaP.2021.OMB.StA.2183
Liquefaction resistance of fibre-reinforced silty sands under cyclic loading
Ghadr, S., Samadzadeh, A., Bahadori, H. and Assadi Langroudi, A. 2020. Liquefaction resistance of fibre-reinforced silty sands under cyclic loading. Geotextiles and Geomembranes. 48 (6), pp. 812-827. https://doi.org/10.1016/j.geotexmem.2020.07.002
Stabilization of Sand with Colloidal Nano-Silica Hydrosols
Ghadr, S., Assadi Langroudi, A., Hung, C., O’Kelly, B. C., Bahadori, H. and Ghodsi, T. 2020. Stabilization of Sand with Colloidal Nano-Silica Hydrosols. Applied Sciences. 10 (Art. 5192). https://doi.org/10.3390/app10155192
Chapter 6 Collapsible Soils in the UK
Culshaw, M. G., Northmore, K. J., Jefferson, I., Assadi Langroudi, A. and Bell, F. G. 2020. Chapter 6 Collapsible Soils in the UK. Engineering Geology Special Publications. 29 (1), pp. 187--203. https://doi.org/10.1144/EGSP29.6
Stabilisation of peat with colloidal nanosilica
Ghadr, S., Assadi Langroudi, A. and Hung, C. 2020. Stabilisation of peat with colloidal nanosilica. Mires and Peat. 26 (Art. 9). https://doi.org/10.19189/MaP.2019.OMB.StA.1896
A conceptual model for loess in England: Principles and applications
Assadi Langroudi, A. 2019. A conceptual model for loess in England: Principles and applications. Proceedings of the Geologists' Association. 130 (2), pp. 115-125. https://doi.org/10.1016/j.pgeola.2018.12.003
Small strain stiffness of loessic soils across South East England
Nobee-Fox, H. and Assadi Langroudi, A. 2019. Small strain stiffness of loessic soils across South East England. International Journal of Research in Engineering and Science. 7 (3), pp. 1-16.
Assessment of the Suitability of the Fall Cone Method to Replace the Casagrande Cup for Liquid Limit Determination of South African Soils
Theron, E., Stott, P. R., Vosloo, P. and Assadi Langroudi, A. 2019. Assessment of the Suitability of the Fall Cone Method to Replace the Casagrande Cup for Liquid Limit Determination of South African Soils. 17th African Regional Conference on Soil Mechanics and Geotechnical Engineering. Cape Town, ZA 06 - 10 Oct 2019 International Society for Soil Mechanics and Geotechnical Engineering.
Anisotropy in Sand–Fibre Composites and Undrained Stress–Strain Implications
Ghadr, S., Bahadori, H. and Assadi Langroudi, A. 2019. Anisotropy in Sand–Fibre Composites and Undrained Stress–Strain Implications. International Journal of Geosynthetics and Ground Engineering. 5 (Art. 23). https://doi.org/10.1007/s40891-019-0174-x
A Probabilistic Approach to the Spatial Variability of Ground Properties in the Design of Urban Deep Excavation
Herridge, J. B., Tsiminis, K., Winzen, J., Assadi Langroudi, A., McHugh, M., Ghadr, S. and Donyavi, S. 2019. A Probabilistic Approach to the Spatial Variability of Ground Properties in the Design of Urban Deep Excavation. Infrastructures. 4 (Art. 51). https://doi.org/10.3390/infrastructures4030051
Compacted Expansive Elastic Silt and Tyre Powder Waste
Ghadr, S., Mirsalehi, S. and Assadi Langroudi, A. 2019. Compacted Expansive Elastic Silt and Tyre Powder Waste. Geomechanics and Engineering. 18 (5), pp. 535-543. https://doi.org/10.12989/gae.2019.18.5.535
Lime Cake as an Alternative Stabiliser for Loose Clayey Loams
Assadi Langroudi, A., Ghadr, S., Theron, E., Oderinde, S. A. and Katsipatakis, E. M. 2019. Lime Cake as an Alternative Stabiliser for Loose Clayey Loams. International Journal of Geosynthetics and Ground Engineering. 5 (Art. 22). https://doi.org/10.1007/s40891-019-0173-y
Effect of Grain Size and Shape on Undrained Behaviour of Sands
Ghadr, S. and Assadi Langroudi, A. 2019. Effect of Grain Size and Shape on Undrained Behaviour of Sands. International Journal of Geosynthetics and Ground Engineering. 5 (Art. 18). https://doi.org/10.1007/s40891-019-0170-1
Gaps in Particulate Matters: Formation, Mechanisms, Implications
Assadi Langroudi, A. and Theron, E. 2019. Gaps in Particulate Matters: Formation, Mechanisms, Implications. 17th African Regional Conference on Soil Mechanics and Geotechnical Engineering. Cape Town, ZA 06 - 10 Oct 2019 International Society for Soil Mechanics and Geotechnical Engineering. pp. 169-174
A Conceptual Model for Climatic-responsive Vernacular Architectural Forms
Kamalifard, S. and Assadi Langroudi, A. 2018. A Conceptual Model for Climatic-responsive Vernacular Architectural Forms. in: Elsharkaway, H., Zahiri, S. and Clough, J. (ed.) International Conference for Sustainable Design of the Built Environment (SDBE 2018): Proceedings International Conference for Sustainable Design of the Built Environment (SDBE 2018). pp. 575-588
Loess as a collapsible soil: Some basic particle packing aspects
Assadi Langroudi, A., Ng’ambi, Samson and Smalley, Ian 2017. Loess as a collapsible soil: Some basic particle packing aspects. Quaternary International. 469 (Part A), pp. 20-29. https://doi.org/10.1016/j.quaint.2016.09.058
Shear Strength in Terms of Coulomb C-Intercept
Assadi Langroudi, A. 2014. Shear Strength in Terms of Coulomb C-Intercept. Journal of Geotechnical Geology. 9 (4), pp. 283-292.
Constraints in using site-won calcareous clayey silt (loam) as fill materials
Assadi Langroudi, A. and Jefferson, I. 2015. Constraints in using site-won calcareous clayey silt (loam) as fill materials. in: Winter, M. G., Smith, D. M., Eldred, P. J. L. and Toll, D. G. (ed.) Geotechnical Engineering for Infrastructure and Development ICE Publishing (Institute of Civil Engineers). pp. 1947-1952
Quantitative evaluation of microstructure characteristics of cement-consolidated soil
Assadi Langroudi, A. 2013. Quantitative evaluation of microstructure characteristics of cement-consolidated soil. Bulletin of Engineering Geology and the Environment. 73 (1), pp. 203-204.
Micromechanics of quartz sand breakage in a fractal context
Assadi Langroudi, A., Jefferson, Ian, O'hara-Dhand, Kenneth and Smalley, Ian 2013. Micromechanics of quartz sand breakage in a fractal context. Geomorphology. 211, pp. 1-10.
Control of fault lay-out on seismic design of large underground caverns
Ardeshiri-Lajimi, Saeid, Yazdani, Mahmoud and Assadi Langroudi, A. 2015. Control of fault lay-out on seismic design of large underground caverns. Tunnelling and Underground Space Technology. 50, pp. 305-316. https://doi.org/10.1016/j.tust.2015.07.002
The response of reworked aerosols to climate through estimation of inter-particle forces
Assadi Langroudi, A. and Jefferson, I. 2016. The response of reworked aerosols to climate through estimation of inter-particle forces. International Journal of Environmental Science and Technology. 13 (4), pp. 1159-1168. https://doi.org/10.1007/s13762-016-0958-7
A Study on the liquefaction risk in seismic design of foundations
Ardeshiri-Lajimi, Saeid, Yazdani, Mahmoud and Assadi Langroudi, A. 2016. A Study on the liquefaction risk in seismic design of foundations. Geomechanics and Engineering. 11 (6), pp. 805-820. https://doi.org/10.12989/gae.2016.11.6.805