Janez Perko

Person

Perko, Janez

  • Engineered and Geosystems Analysis

Person: Employee

  1. Comparison of Numerical Tools Through Thermo-Hydro-Gas Transport Modeling for a Geological Repository in Boom Clay

    Yu, L., Weetjens, E., Perko, J. & Mallants, D., Jun 2011, In : Nuclear Technology. 174, 3, p. 411-423

    Research output: Contribution to journalArticle

  2. Boundary conditions for separation and conditioning: ASOF deliverable D4.1

    Weetjens, E., Govaerts, J., Perko, J., Van Hecke, K. & Govers, K., 28 May 2019, Studiecentrum voor Kernenergie. 52 p. (SCK•CEN Reports; no. ER-0537)

    Research output: Report/bookER - External report

  3. Characterization of carbonation-induced changes in crack features and geometry in hardened cement pastes

    Varzina, A., Phung, Q. T., Rogiers, B., Perko, J., Jacques, D., Maes, N. & Cizer, Ö., 12 Sep 2017, Characterization of carbonation-induced changes in crack features and geometry in hardened cement pastes. RILEM Publications, Vol. PRO 120. p. 747-752

    Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

  4. Influence of fracture networks on radionuclide transport fromsolidified waste forms

    Seetharam, S., Perko, J., Jacques, D. & Mallants, D., 15 Apr 2014, In : Nuclear Engineering and Design. 270, 15/04, p. 162-175

    Research output: Contribution to journalArticle

  5. A Consistent Approach for the Development of a Comprehensive Data Base of Time-dependent Parameters for Concrete Engineered Barriers

    Seetharam, S., Mallants, D., Perko, J., Jacques, D. & Weetjens, E., Sep 2013, Proceedings of the 15th International Conference on Environmental Remediation and Radioactive Waste Management - ICEM2013 (on CD). United States, p. 1-8

    Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

  6. Quantification of leaching kinetics in OPC mortars via a mesoscale model

    Seetharam, S., Patel, R., Perko, J. & Jacques, D., 20 Aug 2018, In : Construction and Building Materials. 180, p. 614–628 15 p.

    Research output: Contribution to journalArticle

  7. Penalising groundwater scenario: Detailed calculation report

    Seetharam, S., Jacques, D., Perko, J., Leterme, B. & Govaerts, J., 1 Oct 2018, Studiecentrum voor Kernenergie. 115 p. (SCK•CEN Reports; no. SCK•CEN ER-0373)

    Research output: Report/bookER - External report

  8. Modeling the decalcification of cement paste in ammonium nitrate solution

    Phung, Q. T., Jacques, D., Maes, N., Perko, J., Ye, G. & De Schutter, G., Oct 2014, 3rd internatinal conference on Service Life design for Infrastructure: Keynote speech. Zhuhai, China, p. 27-40

    Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

  9. Modelling the carbonation of cement pastes under a CO2 pressure gradient considering both diffusive and convective transport

    Phung, Q. T., Maes, N., Jacques, D. & Perko, J., 1 Jul 2016, In : Construction and Building Materials. 114, p. 333-351

    Research output: Contribution to journalArticle

  10. Modelling the evolution of microstructure and transport properties of cement pastes under conditions of accelerated leaching

    Phung, Q. T., Maes, N., Jacques, D., Perko, J., De Schutter, G. & Ye, G., 15 Jul 2016, In : Construction and Building Materials. 115, p. 179-192

    Research output: Contribution to journalArticle

  11. Effect of Limestone Fillers on Ca-leaching and Carbonation of Cement Pastes

    Phung, Q. T., Maes, N., Jacques, D., De Schutter, G., Ye, G. & Perko, J., 12 Sep 2016, Key Engineering Materials: 8th International Conference on Concrete under Severe Conditions - Environment and Loading, CONSEC 2016; Lecco; Italy; 12 September 2016 through 14 September 2016; Code 184679. 2016 ed. Vol. 711. p. 269-276 (Key Engineering Materials).

    Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

  12. Long-term performance of cementitious materials used in nuclear waste disposal-a case study at SCK•CEN

    Phung, Q. T., Seetharam, S., Perko, J., Maes, N., Jacques, D., Liu, S., Valcke, E., Seemann, T., Hoder, G., Lemmens, L., Varzina, A. & Patel, R. A., 2019, Life-Cycle Analysis and Assessment in Civil Engineering: Towards an Integrated Vision: Proceedings of the Sixth International Symposium on Life-Cycle Civil Engineering (IALCCE 2018), 28-31 October 2018, Ghent, Belgium. 2019 ed. Taylor & Francis (CRC), p. 619-627 9 p.

    Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

  13. Evolution of sorption properties in large-scale concrete structures accounting for long-term physical-chemical concrete degradation

    Perko, J., Jacques, D., Seetharam, S. & Mallants, D., Feb 2012, Proceedings of the 14th International Conference on Environmental Remediation and Radioactive Waste Management - ICEM2011. United States

    Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

  14. Coupling time-dependent sorption values of degrading concrete with a radionuclide migration model

    Perko, J., Mallants, D., Jacques, D. & Wang, L., Jul 2010, ICEM'09/DECOM'09 Proceedings of the 12th International Conference on Environmental Remediation and Radioactive Waste Management. Fairfield, NJ 07007-2300, United States

    Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

  15. Diffusion velocity lattice Boltzmann formulation applied to transport in macroscopic porous media

    Perko, J. & Patel, R., Dec 2014, In : International Journal of Modern Physics C. 25, 12, p. 1-9

    Research output: Contribution to journalArticle

  16. Building a Robust Numerical Model for Mass Transport Through Complex Porous Media

    Perko, J., Mallants, D., Vermariën, E. & Cool, W., 6 Nov 2008, Proceedings of COMSOL conference, Hannover 2008. Stockholm, Sweden, Vol. 1.

    Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

  17. Thermohydraulic Analysis of Gas Generation in a Disposal Facility for Vitrified High-Level Radioactive Waste in Boom Clay

    Perko, J. & Weetjens, E., Jun 2011, In : Nuclear Technology. 174, 3, p. 401-410

    Research output: Contribution to journalArticle

  18. Decalcification of cracked cement structures

    Perko, J., Mayer, K. U., Kosakowski, G., De Windt, L., Govaerts, J., Jacques, D., Su, S. & Meeussen, J. C. L., Jun 2015, In : Computational Geosciences. 19, 3, p. 673-693

    Research output: Contribution to journalArticle

  19. Influence of cracks in cementitious engineered barriers in a near-surface disposal system: assessment analysis of the Belgian case

    Perko, J., Seetharam, S., Jacques, D., Mallants, D., Cool, W., Vermariën, E. & Govaerts, J., Sep 2013, Proceedings of the 15th International Conference on Environmental Remediation and Radioactive Waste Management - ICEM2013 (on CD). United States, p. 1-10

    Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

  20. Weight function shape parameter optimization in meshless methods for non-unifrom grids

    Perko, J. & Sarler, B., Apr 2007, In : Computer Modeling in Engineering & Sciences. 19, 1, p. 55-68

    Research output: Contribution to journalArticle

  21. Modelling Approach to LILW-SL Repository Safety Evaluation for Different Waste Packing Options

    Perko, J., Mallants, D., Volckaert, G., Towler, G., Egan, M., Viršek, S. & Hertl, B., 30 May 2008, Proceedings of the 11th International Conference on Environmental Remediation and Radioactive Waste Management - ICEM2007. Fairfield, New Jersey, United States, Vol. 1.

    Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

  22. Verification and validation of flow and transport in cracked saturated porous media

    Perko, J., Seetharam, S. & Mallants, D., Dec 2011, COMSOL Conference CD - Proceedings from Fall 2011 Events. Sweden

    Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

  23. Modelling Long-term Chemical Degradation of a Concrete Container under Near Surface Disposal Conditions

    Perko, J., Seetharam, S., Jacques, D. & Mallants, D., 14 Oct 2011, 1st International Symposium on Cement-Based Materials for Nuclear Wastes. France

    Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

  24. Water saturation and flow in a surface disposal facility: Numerical study for the Dessel repository

    Perko, J., Jacques, D. & Govaerts, J., 1 Jun 2017, Studiecentrum voor Kernenergie. 107 p. (SCK•CEN Reports; no. SCK•CEN ER-0355)

    Research output: Report/bookER - External report

  25. A single-relaxation-time lattice Boltzmann model for anisotropic advection-diffusion equation based on the diffusion velocity flux formulation

    Perko, J., 1 Dec 2018, In : Computational Geosciences. 22, 6, p. 1423-1432 10 p.

    Research output: Contribution to journalArticle

  26. Numerically accelerated pore-scale equilibrium dissolution

    Perko, J. & Jacques, D., 1 Jan 2019, In : Journal of Contaminant Hydrology. 220, p. 119-127 9 p.

    Research output: Contribution to journalArticle

  27. Expected evolution scenario for the near surface radioactive waste disposal facility at Dessel, Belgium: Conceptual and mathematical model description and analysis of results

    Perko, J., Govaerts, J. & Jacques, D., 1 Nov 2018, Studiecentrum voor Kernenergie. 335 p. (SCK•CEN Reports; no. SCK•CEN ER-0336)

    Research output: Report/bookER - External report

  28. Numerically accelerated chemical evolution in cementitious systems

    Perko, J. & Jacques, D., 24 Oct 2018, SynerCrete'18: Interdisciplinairy approaches for cement-based materials and structural concrete: synergizing expertise and bridging scales of space and time. RILEM Publications, Vol. PRO 121. p. 761-766 6 p.

    Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

  29. Methodology of numerically aided optimisation of consolidants for surface treatments of mortars

    Perko, J., Yu, L., Jacques, D., Koenders, E. A. B., Ukrainczyk, N., Varzina, A., Maravelaki, P-N. & Arabatzis, I., 20 Mar 2019, Proceedings of the International Conference on Sustainable Materials, Systems and Structures (SMSS2019): Durability, Monitoring and Repair of Structures. RILEM Publications, Vol. PRO 128. p. 812-813 2 p.

    Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

  30. The importance of physical parameters for the penetration depth of impregnation products into cementitious materials: Modelling and experimental study

    Perko, J., Zarzuela, R., Garcia-Lodeiro, I., Blanco-Varela, M. T., Mosquera, M. J., Seeman, T. & Yu, L., 10 Oct 2020, In : Construction and Building Materials. 257, p. 1-11 11 p., 119595.

    Research output: Contribution to journalArticle

  31. Influence of Micro-Pore Connectivity and Micro-Fractures on Calcium Leaching of Cement Pastes—A Coupled Simulation Approach

    Perko, J., Ukrainczyk, N., Savija, B., Phung, Q. T. & Koenders, E. A. B., 13 Jun 2020, In : Materials. 13, 12, p. 1-21 21 p., 2697.

    Research output: Contribution to journalArticle

  32. Lattice Boltzmann based multicomponent reactive transport model coupled with geochemical solver for pore scale simulations

    Patel, R., Perko, J., Jacques, D., De Schutter, G., Ye, G. & Van Breugel, K., Jun 2013, Computational Methods for Coupled Problems in Science and Engineering V. Barcelona, Spain, p. 806-817

    Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

  33. A versatile pore-scale multicomponent reactive transport approach based on lattice Boltzmann method: Application to portlandite dissolution

    Patel, R., Perko, J., Jacques, D., De Schutter, G., Van Breugel, K. & ye, G., Jun 2014, In : Physics and Chemistry of the Earth. 70-71, p. 127-137

    Research output: Contribution to journalArticle

  34. Simulating evolution in cement microstructure during chemical degradation

    Patel, R., Perko, J., Jacques, D., De Schutter, G., Van Breugel, K. & Ye, G., Jul 2014, Proceedings of The 10th fib International PhD Symposium in Civil Engineering. Canada, p. 173-178

    Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

  35. Application of a pore-scale reactive transport model to study the influence of pore network characteristics on calcium leaching in cementitious systems

    Patel, R., Perko, J., Jacques, D., De Schutter, G., Ye, G. & Van Breugel, K., Oct 2014, CONMOD 2014. Proceedings of the RILEM International Symposium on Concrete Modelling. France, Vol. 1. p. 359-366

    Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

  36. Lattice Boltzmann method based framework for simulating physico-chemical processes in heterogeneous porous media and its application to cement paste

    Patel, R., Perko, J., Jacques, D., De Schutter, G. & Van Breugel, K., 21 Apr 2016, Gent: UGent - Universiteit Gent. 275 p.

    Research output: ThesisDoctoral thesis

  37. Diffusivity of saturated ordinary Portland cement-based materials: A critical review of experimental and analytical modelling approaches

    Patel, R., Phung, Q. T., Seetharam, S., Perko, J., Jacques, D., Maes, N., De Schutter, G., Ye, G. & Van Breugel, K., 1 Dec 2016, In : Cement and Concrete Research. 90, p. 52–72

    Research output: Contribution to journalArticle

  38. Can a reliable prediction of cement paste transport properties be made using microstructure models?

    Patel, R., Perko, J., Jacques, D., Perko, J., De Schutter, G., Ye, G. & Van Breugel, K., 22 Aug 2016, Service Life of Cement-Based Materials and Structures. : Proceedings of the International RILEM Conference Materials, Systems and Structures in Civil Engineering 2016. RILEM Publications, Vol. 1. p. 203-210

    Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

  39. Effective diffusivity of cement pastes from virtual microstructures: Role of gel porosity and capillary pore percolation

    Patel, R., Perko, J., Jacques, D., De Schutter, G., Ye, G. & Van Breugel, K., 20 Mar 2018, In : Construction and Building Materials. 165, p. 833-845 13 p.

    Research output: Contribution to journalArticle

  40. A three-dimensional lattice Boltzmann method based reactive transport model to simulate changes in cement paste microstructure due to calcium leaching

    Patel, R., Perko, J., Jacques, D., De Schutter, G., Ye, G. & Van Breugel, K., 20 Mar 2018, In : Construction and Building Materials. 166, p. 158-170 13 p.

    Research output: Contribution to journalArticle

  41. Innovative in-situ determination of unsaturated hydraulic properties in deep loess sediments in North-West Bulgaria

    Mallants, D., Antonov, D., Karastanev, D. & Perko, J., 13 May 2008, The 11th International Conference on Environmental Remediation and Radioactive Waste Management. Fairfield, NJ, USA, United States, p. 1-7

    Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

  42. Modelling multi-phase flow phenomena in concrete barriers used for geological disposal of radioactive waste

    Mallants, D., Jacques, D. & Perko, J., 30 May 2008, The 11th International Conference on Environmental Remediation and Radioactive Waste Management. Fairfield, NJ, United States, p. 1-9

    Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

  43. A cement degradation model for evaluating the evolution of retardation factors in radionuclide leaching models

    Jacques, D., Perko, J., Seetharam, S. & Mallants, D., Oct 2014, In : Applied Geochemistry. 49, 10, p. 143-158

    Research output: Contribution to journalArticle

  44. Concrete in engineered barriers for radioactive waste disposal facilities – Phenomenological study and assessment of long term performance

    Jacques, D., Maes, N., Perko, J., Seetharam, S., Phung, Q. T., Patel, R., Soto Masip, A., Liu, S., Wang, L., De Schutter, G., Ye, G., van Breughel, K. & Druyts, F., Sep 2013, Proceedings of the ASME 2013 15th International Conference on Environmental Remediation and Radioactive Waste Management. ICEM2013 (on CD). United States, p. 1-10

    Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

  45. Model abstraction addressing long-term simulations of chemical degradation of large-scale structures

    Jacques, D., Perko, J., Seetharam, S. & Mallants, D., Oct 2011, Proceedings 1st International Symposium on Cement-based Materials for Nuclear Wastes. NUWCEM 2011. Marcoule, France

    Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

  46. Evaluating changes of transport properties of chemically degrading concrete using a coupled reactive transport model

    Jacques, D., Šimůnek, J., Mallants, D., Perko, J. & Seetharam, S., Oct 2011, Proceedings 1st International Symposium on Cement-based Materials for Nuclear Wasters. NUWCEM 2011. Marcoule, France, p. 1-12

    Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

  47. Modelling long-term evolution of cementitious materials used in waste disposal

    Jacques, D., Perko, J., Seetharam, S., Mallants, D. & Govaerts, J., Dec 2013, The Behaviours of Cementitious Materials in Long Term Storage and Disposal of Radioactive Waste : Results of a Coordinated Research Project. 1 ed. Vienna, Austria: IAEA - International Atomic Energy Agency, p. 1-26 (IAEA Tecdoc; no. 1701).

    Research output: Contribution to report/book/conference proceedingsChapter

  48. The long-term safety and performance analyses of the surface disposal facility for the Belgian category A waste at Dessel

    Cool, W., Vermariën, E., Wacquier, W., Perko, J. & Van Iseghem, P., Sep 2013, Proceedings of the 15th International Conference on Environmental Remediation and Radioactive Waste Management - ICEM2013 (on CD). United States, p. 1-10

    Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

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