Change search
Link to record
Permanent link

Direct link
BETA
Publications (10 of 138) Show all publications
Chabuk, A., Al-Ansari, N., Hussain, H. M., Laue, J., Hazim, A., Knutsson, S. & Pusch, R. (2019). Landfill Sites Selection Using MCDM and Comparing Method of ChangeDetection for Babylon Governorate, Iraq. Environmental science and pollution research international
Open this publication in new window or tab >>Landfill Sites Selection Using MCDM and Comparing Method of ChangeDetection for Babylon Governorate, Iraq
Show others...
2019 (English)In: Environmental science and pollution research international, ISSN 0944-1344, E-ISSN 1614-7499Article in journal (Refereed) Accepted
Abstract [en]

Landfill site`s selection represents a complicated process due to the large number of variables to be adopted. In this study, an arid area (Babylon Governorate as a case study) was selected. It is located in the middle region of Iraq. In this area, the  landfills do not satisfy the required  international criteria.  Fifteen  of the  most significant criterion were selected for this purpose. For suitable weight for each criterion, the multi criteria decision making (MCDM) methods were applied. These methods are AHP and RSW. In the GIS software 10.5, the raster maps of the chosen criterion were arranged and analysed. The method of change detection was implemented to determine the matching pixels and non-matching pixels. The final results showed that there are two candidate locations for landfills for each district in the governorate (ten sites). The areas of the selected sites were sufficient to contain the cumulative quantity of solid waste from 2020 until 2030.

Place, publisher, year, edition, pages
Springer Publishing Company, 2019
Keywords
MCDM, Change Detection, RSW, AHP, Landfill siting
National Category
Engineering and Technology Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-73400 (URN)
Available from: 2019-04-03 Created: 2019-04-03 Last updated: 2019-04-17Bibliographically approved
Pusch, R., Kasbohm, J., Hoang-Minh, T., Nguyen-Thanh, L. & Warr, L. (2018). Deep disposal of spent nuclear fuel. In: WIT Transactions on Ecology and the Environment: . Paper presented at 9th International Conference on Waste Management and the Environment, Seville, 17-19 September 2018. WIT Press
Open this publication in new window or tab >>Deep disposal of spent nuclear fuel
Show others...
2018 (English)In: WIT Transactions on Ecology and the Environment, WIT Press, 2018Conference paper, Published paper (Refereed)
Abstract [en]

An alternative but still untested approach is to dispose of highly radioactive waste in very deep boreholes, a concept being considered in the UK and the US. One version of this concept known as Very-Deep-Hole (VDH) storage proposes drilling of up to 4 km deep holes and placing in a series of stacked super-containers sealed by a combination of dense clay and concrete. In this case the risk of losing clay material by dispersion and erosion where the holes intersect fracture zones would be eliminated by casting concrete of a new type. VDH containment relies on the use of copper or Navy Bronze tubes filled with dense clay in the upper parts of the holes and with clay-embedded canisters with waste in the lower parts. The maturation and isolating function of the clay seals in the holes and their chemical interaction with concrete and waste canisters are considered and assessed. The work has focused on the mechanical testing and microscope investigations of the clay/concrete. Hydrothermally treated clay and concrete, exposed to 20-150°C, which represents the conditions over the entire length of a real VDH, have been tested. The recorded impact of strong heating showed stiffening and some reduction in hydraulic conductivity of the clay and concrete.

Place, publisher, year, edition, pages
WIT Press, 2018
Keywords
nuclear fuel, deep boreholes, clay, concrete, waste disposal, waste isolation, engineered barriers, longevity
National Category
Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-73493 (URN)10.2495/WM180371 (DOI)2-s2.0-85062219827 (Scopus ID)
Conference
9th International Conference on Waste Management and the Environment, Seville, 17-19 September 2018
Available from: 2019-04-08 Created: 2019-04-08 Last updated: 2019-04-08
Chabuk, A., Al-Ansari, N., Alkaradaghi, K., Al-Rawabdeh, A. M., Laue, J., Hussain, H. M., . . . Knutsson, S. (2018). Landfill Final Cover Systems Design for Arid Areas Using the HELP Model: A Case Study in the Babylon Governorate, Iraq. Sustainability, 10(12), Article ID 4568.
Open this publication in new window or tab >>Landfill Final Cover Systems Design for Arid Areas Using the HELP Model: A Case Study in the Babylon Governorate, Iraq
Show others...
2018 (English)In: Sustainability, ISSN 2071-1050, E-ISSN 2071-1050, Vol. 10, no 12, article id 4568Article in journal (Refereed) Published
Abstract [en]

The main purpose of selecting proper designs for landfills is to accommodate quantities

of waste without having a negative effect on the surrounding environment and human health.

The Babylon Governorate (province) in Iraq was taken as an example of an arid area with very shallow groundwater and where irregular waste disposal sites had developed that had not been subject to international standards when they were selected for landfill use. In the current study, the suggested design for landfills is a base liner and final cover system. In this suggested design, the final cover system allows for three scenarios. The first scenario considers an evapotranspiration soil cover (ET) (capillary barriers type), the second scenario is a modified cover design of “RCRA Subtitle D”, and the third scenario is a combination of the first and second scenarios. The HELP 3.95 D model was applied to the selected landfill sites in the governorate to check if there was any penetration of the leachate that might in future percolate from the landfill’s bottom barrier layer in arid areas. The results from the suggested landfill design showed that there was no leachate percolation from the bottom barrier layer using the second and third scenarios. For the first scenario, however, there was a small amount of leachate through the bottom barrier layer in the years 2013 and 2014.

Place, publisher, year, edition, pages
MDPI, 2018
Keywords
landfill; suggested design; cover systems;HELP 3.95Dmodel; arid area; shallowgroundwater
National Category
Engineering and Technology Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-71877 (URN)10.3390/su10124568 (DOI)000455338100234 ()2-s2.0-85057806229 (Scopus ID)
Note

Validerad;2018;NIvå 2;2018-12-07 (svasva)

Available from: 2018-12-04 Created: 2018-12-04 Last updated: 2019-04-02Bibliographically approved
Pusch, R. & Weston, R. (2018). Retraction notice to "Superior techniques for disposal of highly radioactive waste (HLW)": [Progress in Nuclear Energy 59, (2012), 75-85] (ed.) [Letter to the editor]. Progress in nuclear energy (New series), 108, 517
Open this publication in new window or tab >>Retraction notice to "Superior techniques for disposal of highly radioactive waste (HLW)": [Progress in Nuclear Energy 59, (2012), 75-85]
2018 (English)In: Progress in nuclear energy (New series), ISSN 0149-1970, E-ISSN 1878-4224, Vol. 108, p. 517-Article in journal, Letter (Refereed) Published
Place, publisher, year, edition, pages
Elsevier, 2018
National Category
Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-70695 (URN)10.1016/j.pnucene.2018.08.002 (DOI)
Available from: 2018-08-31 Created: 2018-08-31 Last updated: 2018-08-31Bibliographically approved
Pusch, R., Warr, L. N., Knutsson, S. & Yang, T. (2017). A review of cementitious sealants for Deep Boreholes with HLW. Engineering Geology
Open this publication in new window or tab >>A review of cementitious sealants for Deep Boreholes with HLW
2017 (English)In: Engineering Geology, ISSN 0013-7952, E-ISSN 1872-6917Article in journal (Refereed) Submitted
Abstract [en]

Cement-based materials for use as sealants in underground waste storages must be erosion-resistant and chemically stable. Placement of highly radioactive waste (HLW) in boreholes may require that the rock is cement-grouted and stabilized by constructing concrete plugs. Where smectitic clay seals are in contact with concrete there is mutual degradation, and low-pH cement with inorganic superplasticizers, like talc, are recommended for preparing the concrete. This paper reviews our current state-of-knowledge concerning the grout and concrete sealing very deep boreholes (VDH) for purpose of high-level radioactive waste disposal.  In this concept, the lower 2 km section of 4 km deep holes bored in crystalline rock could host waste-containers while the upper parts are sealed by dense clay and concrete. The parts of a VDH that intersect fracture-poor rock are sealed with dense expandable clay while concrete is cast where fracture zones are intersected. The paper summarizes the available experimental results concerning the performance of grouts and concrete with talc as superplasticizer in contact with smectitic clay.

Keywords
Boreholes, Clay, Concrete, Radioactive waste, Talc, VDH
National Category
Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-62174 (URN)
Available from: 2017-02-25 Created: 2017-02-25 Last updated: 2018-06-26
Forsberg, T., Pusch, R., Yang, T. & Knutsson, S. (2017). Borehole seals of expandable clay with desired water content by use of “dry water”. In: Proceedings of the 19th International Conference on Soil Mechanics and Geotechnical Engineering, Seoul 2017: . Paper presented at 19th International Conference on Soil Mechanics and Geotechnical Engineering, Coex, Seoul, Korea, 17~22 September 2017.
Open this publication in new window or tab >>Borehole seals of expandable clay with desired water content by use of “dry water”
2017 (English)In: Proceedings of the 19th International Conference on Soil Mechanics and Geotechnical Engineering, Seoul 2017, 2017Conference paper, Published paper (Refereed)
Abstract [en]

Dense clay can be used for sealing of boreholes and isolation of waste containers. Expansion of the clay to fill the space between containers and confining rock takes place by uptake of water of the clay, which thereby provides effective isolation. The issue is to prepare clay inserts with properly selected water content. The paper describes preparation of clay seals by mixing air-dry clay powder with nanoparticles of water droplets coated with very thin shells of a hydrophobic silicious substance (“dry water”). It behaves as dry powder and is easily mixed with dry clay. On compaction to the desired density the shells break into microscopic fragments while water becomes homogeneously distributed in the mass. Laboratory tests verify that the properties of clay prepared in this way are the same, or better, than of commonly saturated clay.

Abstract [fr]

On peut utiliser de l'argile dense pour sceller les forages et isoler les conteneurs de déchets. L'expansion de l'argile pourremplir l'espace entre les récipients et la roche confinant a lieu par absorption d'eau de l'argile, ce qui fournit ainsi un isolement efficace. La question est de préparer des inserts d'argile avec une teneur en eau correctement sélectionnée. L'article décrit la préparation de joints d'argile en mélangeant de la poudre d'argile séchée à l'air avec des nanoparticules de gouttelettes d'eau revêtues de coquilles très minces d'une substance siliceuse hydrophobe ("eau sèche"). Il se comporte comme une poudre sèche et se mélange facilement avec de l'argile sèche. Lors du compactage à la densité souhaitée, les coquilles se cassent en fragments microscopiques tandis que l'eau se répartit de manière homogène dans la masse. Des essais en laboratoire vérifient que les propriétés de l'argile préparée de cette façon sont les mêmes, ou mieux, que les argiles couramment saturées.

Keywords
borehole sealing, clay blocks, degree of saturation, density, “dry water”, water content
National Category
Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-64920 (URN)
Conference
19th International Conference on Soil Mechanics and Geotechnical Engineering, Coex, Seoul, Korea, 17~22 September 2017
Available from: 2017-07-29 Created: 2017-07-29 Last updated: 2018-06-26Bibliographically approved
Forsberg, T., Pusch, R., Yang, T. & Knutsson, S. (2017). Borehole seals of expandable clay with desired water content by use of “dry water”.
Open this publication in new window or tab >>Borehole seals of expandable clay with desired water content by use of “dry water”
2017 (English)In: Article in journal (Refereed) Submitted
Abstract [en]

Dense clay can be used for sealing of boreholes. Keeping the clay confined in perforated tubes it can be inserted in boreholes of nearly any length and diameter. Expansion of the clay to fill the borehole takes place by uptake of water and migration of clay through the perforation. The clay thereby exerts a swelling pressure on the confining rock causing effective sealing. For shallow boreholes to be sealed a very low initial degree of water saturation of the clay may be valuable since this makes the clay expand and seal the hole quickly, but for certain cases the clay should have a higher degree of water saturation. This can be required for moderating the rate of clay densification that may otherwise give too high wall friction for placement in very long holes. Sealing of very deep holes and holes containing highly radioactive waste makes temperature important: the heat-induced expansion of initially fully saturated clay can fracture the confining rock. The issue is therefore to prepare the clay inserts withproperly selected water content. The paper describes preparation of clay seals by mixing air-dry clay powder with nanoparticles of water droplets coated with very thin shells of a hydrophobic silicious substance (“dry water”). It behaves as dry powder and is easily mixed with dry clay. On compaction to the desired density the shells break into aggregates of minute fragments while water becomes homogeneously distributed in the mass. Laboratory and bench-scale testing verify that the properties of clay prepared in this way are the same as of clay saturated by sorbing water through a filter, a process that can take hundreds of years for big samples. Keywords:borehole sealing, clay blocks, degree of saturation, density, “dry water”, water content1. IntroductionSeveral concepts for sealing of boreholes and disposal of radioactive waste make use of dense

National Category
Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-36823 (URN)
Available from: 2016-10-02 Created: 2016-10-02 Last updated: 2018-06-26
Chabuk, A., Al-Ansari, N., Hussain, H. M., Knutsson, S., Pusch, R. & Laue, J. (2017). Combining GIS Applications and Method of Multi-Criteria Decision-Making (AHP) for Landfill Siting in Al-Hashimiyah Qadhaa, Babylon, Iraq. Sustainability, 9(11), Article ID 1932.
Open this publication in new window or tab >>Combining GIS Applications and Method of Multi-Criteria Decision-Making (AHP) for Landfill Siting in Al-Hashimiyah Qadhaa, Babylon, Iraq
Show others...
2017 (English)In: Sustainability, ISSN 2071-1050, E-ISSN 2071-1050, Vol. 9, no 11, article id 1932Article in journal (Refereed) Published
Abstract [en]

Landfill siting is a complex process. It is one of the major problems in waste management, where many factors should be taken into consideration when selecting a suitable site for landfill in any given area. At the present time, there are many random waste disposal sites distributed throughout Al-Hashimiyah Qadhaa in Iraq. In this study, the Geographic Information System (GIS) and the Analytical Hierarchy Process (AHP) were used to select the best sites for landfill. The process of selecting sites for landfill in Al-Hashimiyah Qadhaa comprised two steps. First, fifteen different criteria were mapped and incorporated into overlay analyses within GIS software to produce the final suitability index map for the site. The second step comprises the exclusion of unsuitable areas from the final map to simplify identification of the candidate sites for landfill in the study area. The weightings of criteria were identified using AHP, and the weightings of the sub-criteria of each criterion were determined based on multiple factors. In order to accommodate solid waste from 2020 until 2030, two suitable candidate landfill sites were determined which fulfill the required area of 1.013 km2 with areas of 1.374 km2 and 1.288 km2 respectively.

Place, publisher, year, edition, pages
Basel: MDPI, 2017
National Category
Engineering and Technology Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-66261 (URN)10.3390/su9111932 (DOI)000416793400012 ()2-s2.0-85032357203 (Scopus ID)
Note

Validerad;2017;Nivå 2;2017-10-31 (rokbeg)

Available from: 2017-10-25 Created: 2017-10-25 Last updated: 2019-03-08Bibliographically approved
Pusch, R., Warr, L. N., Knutsson, S. & Yang, T. (2017). Condensed summary of current R&D on cementitious sealants for deep boreholes with HLW. Engineering Geology, 226, 192-198
Open this publication in new window or tab >>Condensed summary of current R&D on cementitious sealants for deep boreholes with HLW
2017 (English)In: Engineering Geology, ISSN 0013-7952, E-ISSN 1872-6917, Vol. 226, p. 192-198Article in journal (Refereed) Published
Abstract [en]

Cement-based materials for use as sealants in underground waste storages must be erosion-resistant and chemically stable. Placement of highly radioactive waste (HLW) in boreholes may require that the rock is cement-grouted and stabilized by constructing concrete plugs. Where smectitic clay seals are in contact with concrete there is mutual degradation, and low-pH cement with inorganic superplasticizers, like talc, are recommended for preparing the concrete. This paper reviews our current state-of-knowledge concerning the grout and concrete sealing very deep boreholes (DBD) for purpose of high-level radioactive waste disposal. In this concept, the lower 2 km section of 4 km deep holes bored in crystalline rock could host waste-containers while the upper parts are sealed by dense clay and concrete.1 The parts of such a hole that intersect fracture-poor rock are sealed with dense expandable clay while concrete is cast where fracture zones are intersected. The paper summarizes the available experimental results concerning the performance of grouts and concrete with talc as superplasticizer in contact with smectitic clay.

Place, publisher, year, edition, pages
Elsevier, 2017
Keywords
Boreholes, Clay, Concrete, DBD, Radioactive waste, Talc, VDH
National Category
Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-64446 (URN)10.1016/j.enggeo.2017.06.008 (DOI)000410869000016 ()
Note

Validerad;2017;Nivå 2;2017-08-17 (rokbeg)

Available from: 2017-06-25 Created: 2017-06-25 Last updated: 2018-06-26Bibliographically approved
Pusch, R., Weston, R. & Yang, T. (2017). Creep Processes Involved in the Maturation of Clay-isolated Highly Radioactive Waste in Very Deep Holes. Journal of Earth Sciences and Geotechnical Engineering, 7(4), 17-25
Open this publication in new window or tab >>Creep Processes Involved in the Maturation of Clay-isolated Highly Radioactive Waste in Very Deep Holes
2017 (English)In: Journal of Earth Sciences and Geotechnical Engineering, ISSN 1792-9040, E-ISSN 1792-9660, Vol. 7, no 4, p. 17-25Article in journal (Refereed) Published
Abstract [en]

The basic idea of concepts for disposal of highly radioactive waste deep in rock is that the heavy, saline, stagnant formational waters are unlikely to rise to contaminate shallow groundwater. A recent concept involves placement of the waste in the lower 2 km part of up to 4 km deep holes bored in granitic rock, and relies on the sealing capacity of engineered barriers in the form of concrete and clay in the upper parts of the holes. The parts located in fracture-poor rock are sealed with dense expandable clay, while concrete is cast where pre-grouted fracture zones are intersected. The holes will converge by creep and eventually exert the seals to radial compression. Using a new rheological model based on the Kelvin model in combination with a stochastic mechanical model, the predicted radial hole convergence causes a vanishingly small increase in pressure on the seals in the first 10,000 years. In a long time perspective they will be compressed and become less permeable. Parallel conversion of the clay minerals to become less expandable will, however, reduce this potential.

Place, publisher, year, edition, pages
ScienPress Ltd, 2017
Keywords
Boreholes, Clay, Concrete, Convergence, Creep, Elasticity, Radioactive waste, Rheology, Stress, Viscosity
National Category
Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
urn:nbn:se:ltu:diva-63485 (URN)
Note

Validerad;2018;Nivå 1;2018-08-17 (marisr)

Available from: 2017-05-22 Created: 2017-05-22 Last updated: 2018-11-15Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-6851-4839

Search in DiVA

Show all publications