Stabilisation of peat with colloidal nano and micro silica

Article


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
AuthorsGhadr, S. and Assadi Langroudi, A.
Abstract

Peat occurs abundantly in wetlands across Iran, particularly around the disappearing Urmia Lake. Conventional chemical stabilisation has been widely used to tackle the high compressibility and shrinkage potential of peat. Whilst effective, this generally reduces the carbon storage capacity of peat. Exotic stabilisers such as nano-silica (NS) have been shown to be relatively less harmful and without any direct environmental risk. NS has proved effective in improving the mechanical properties (to some extent) and pH-dependent natural structure of peat, but is commercially nonviable. This article presents findings from an experimental study of Urmia Lake peat stabilised with composites of NS and cheaper micro-silica (MS). Unconfined compressive strength (UCS) and California Bearing Ratio (CBR) tests were conducted on untreated and treated compacted natural peat soil samples after 7, 14 and 28 days of curing. Nano-silica was varied from 3 % to 9 % (by dry mass) in 3 % increments and micro-silica was varied from 6 % to 24 % (by dry mass) in 6 % increments. The observations are explained in terms of micro-scale events using XRF spectroscopy and SEM imaging. The findings suggest that the UCS of peat can be increased by administration of NS-MS composites, and the effectiveness is dependent on the relative content and particle size of NS and MS. The UCS and elasticity modulus increase with curing time. As manifested in the CBR results, administration of the composites improves the bearing capacity of peat and transforms it into a sub-base with suitable engineering functions whilst safeguarding its ecosystem service provisions.

JournalMires and Peat
Journal citation28 (Art. 14)
ISSN1819-754X
Year2022
PublisherInternational Mire Conservation Group and International Peat Society
Publisher's version
License
File Access Level
Anyone
Digital Object Identifier (DOI)https://doi.org/10.19189/MaP.2021.OMB.StA.2183
Web address (URL)http://www.mires-and-peat.net/pages/volumes/map28/map2814.php
Publication dates
Online20 May 2022
Publication process dates
Accepted17 May 2022
Deposited21 Jun 2022
Copyright holder© 2022 Mires and Peat
Permalink -

https://repository.uel.ac.uk/item/8qvvz

Download files


Publisher's version
map_28_14.pdf
License: CC BY 4.0
File access level: Anyone

  • 235
    total views
  • 209
    total downloads
  • 7
    views this month
  • 1
    downloads this month

Export as

Related outputs

Pore-pressure-dependent performance of rocking foundations
Irani, A. E., Hajialilue-Bonab, M., Assadi Langroudi, A. and Maleki Tabrizi, E. 2024. Pore-pressure-dependent performance of rocking foundations. Soil Dynamics and Earthquake Engineering. 183 (Art. 108772). https://doi.org/10.1016/j.soildyn.2024.108772
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
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
Structure-based hydro-mechanical properties of sand-bentonite composites
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
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