Repositorio DSpace at LNEC: Recent submissions

  • Mechanical performance of HDPE geomembranes seams after sunlight exposure 
    Lopes, M. G.; Barroso, M. P. (EuroGeo 3, 2004-03)
    Geosynthetic materials are increasingly used in solid waste landfills, but geosynthetic mechanical properties can change when exposed to sunlight. The experience with the evolution of mechanical performance due to UV ...
  • Influence of the textured structure of geomembranes on the flow rate through geomembrane-GCL composite liners 
    Barroso, M. P.; Touze-Folz, N.; Maubeuge, K. V. (EuroGeo4, 2008-09)
    Laboratory tests for measuring the flow rate through composite liners due to geomembrane (GM) defects were carried out. Composite liners consisted of a GM, with a circular hole, a geosynthetic clay liner (GCL) and a ...
  • To-SEAlert project. Wave overtopping and flooding in coastal and port areas: Tools for an early warning, emergency planning and risk management system 
    Fortes, C. J. E. M.; Zózimo, A. C.; Santos, J. A.; Pinheiro, L.; Lemos, R.; Capitão, R.; Reis, M. T. L. G. V.; Fonseca, A. M.; Roque, D.; Serrazina, V.; Barateiro, J.; Craveiro, J.; Andriolo, U.; Taborda, R.; Silva, A. M.; Ferreira, J.; Santos, C.; DUARTE, C.M.; Lara, J. L. (16th International Conference Littoral22, 2022-09-13)
    The To-SEAlert project (Fortes et al. 2019) aims to include a set of tools/methodologies into the Early Warning Systems (EWS) HIDRALERTA, (Poseiro, 2019, Fortes et al., 2021, Santos et al., 2020, Zózimo et al., 2021, ...
  • Relationship between temperature and peel strength of double hot wedge HDPE geomembranes seams 
    Lopes, M. G.; Barroso, M. P.; Costa , C. (8th International Conference on Geosynthetics, 2006-09)
    In landfills, the decision of conformity/non-conformity of HDPE geomembranes double hot wedge seams is usually evaluated by destructive tests: peel and shear tests. Laboratory tests were conducted to study the influence ...
  • Geoenvironmental applications of geosynthetics 
    Touze-Folz, N.; Lupo. J.; Barroso, M. P. (4th European Geosynthetics Congress EuroGeo4, 2008-09)
    The Keynote Lecture focuses on the use of geosynthetics for geoenvironmental applications that are linked with landfills, mining applications and ponds for environmental protection. The Keynote Lecture gives insight into ...
  • Effect of the waste pressure on fluid migration through geomembrane defects 
    Barroso, M. P.; Lopes, M. G.; Bergamini, G. (9th International Conference on Geosynthetics, 2010-05)
    Composite liners consisting of a geomembrane (GM), with a circular hole, a geosynthetic clay liner (GCL) and a compacted clay liner (CCL) were studied through laboratory tests. Flow rates at the interface between the GM ...
  • GEO12-FW-017 - Integrity of HDPE Geomembranes: Effect of Weather Exposure on the Mechanical Properties of Seams 
    Barroso, M. P.; Lopes, M. G.; Dores, R.; Coimbra, L. (Second Pan American Geosynthetics Conference & Exhibition GeoAmericas 2012, 2012-05)
    In landfills, the geomembrane is essential to minimize the migration of pollutants into the surrounding environment. However, the performance of the geomembrane in the long-term may be compromised by weather exposure. To ...
  • GEO12-FW-020 - Suitability of a Semi-automatic Mobile System for Detecting Defects of Different Sizes and Shapes in Landfill Liners 
    Lopes, M. G.; Barroso, M. P.; Mota, R.; Miguens Matutino, P.; Soarez, I.; Dores, R.; Silva, F. (Second Pan American Geosynthetics Conference & Exhibition GeoAmericas 2012, 2012-05)
    Landfills are engineered facilities construct with a barrier system (lining system) intending to ensure the protection of the environment. The effectiveness of lining systems depends, above all, of the performance of the ...
  • Semi-automatic Mobile System for Detecting Defects in Landfill Liners: Tests in a Pilot Plant at LNEC 
    Barroso, M. P.; Mota, R.; Coimbra, L.; Lopes, M. G.; Matutino, P.; Dores, R.; Silva, F. (International Conference on Geotechnical Engineering, 2013-02)
    The effectiveness of lining systems in service conditions is highly dependent on the performance of geomembranes. However, defects are every-present problem, and for covered geomembranes such as the ones used in landfills, ...
  • Engineered and reusable nanoporous carbons for advanced water treatment. 
    Mestre, A.S.; Mesquita, E.; Duque, L.P.; Rosa, M. J.; Viegas, R.M. C.; Betz, W.; Carvalho, A. P. (2022-03)
    The main objective of the EMPOWER+ project is to develop new high-performing GACs and PACs and reusable magnetic powdered activated carbons (MPACs), prepared by steam and CO2 activation of pine nut shells (PNS/Steam and ...
  • Protocol for water reclamation by ozone/reverse osmosis for safe direct potable reuse in beer production 
    Galego, J.; Lourinho, R,; Figueiredo, D.; Costa, C.; Viegas, R.M. C.; Rosa, M. J. (IWA Publishing, 2022-09)
    Water scarcity and the increasing contamination of water resources are driving the use of alternative sources, such as the use of treated effluents. This study aims to demonstrate the combination of ozonation and reverse ...
  • Semi-automatic mobile equipment test for detecting holes in geomembranes - the prototypes evolution 
    Mota, R.; Coimbra, L.; Barroso, M. P.; Matutino, P.; Lopes, M. G.; Dores, R.; Silva, F. (Near Surface Geoscience 2013 – 19th European Meeting of Environmental and Engineering Geophysics Bochum, 2013-09)
    Landfills contain basal lining systems that include composite liners, among which a geomembrane (GM).The success of these systems depends mainly on the GM performance, which acts as the primary barrier to contaminants ...
  • Ageing HDPE geomembranes exposed to different climate conditions for 12 years 
    Barroso, M. P.; Lopes, M. G.; Neves dos Reis, A. (6th European Geosynthetics Congress, EuroGeo 6, 2016-09)
    High density polyethylene (HDPE) geomembranes are used in many geotechmical engineermg applications, remaining sometimes exposed to climatological conditions for a long time. They are expected to experience degradation due ...
  • Numerical analysis of geogrid contribution to railway track reinforcement 
    Lanca, A.; Dimitrovová, Z.; Barroso, M. P.; Fontul, S. (14th International Conference on Vibration Engineering and Technology of Machinery, 2018-09)
    In this work, influence of geogrids on overall stabilization of railway tracks is studied numerically. It is expected that by geogrids implementation significant reduction in the downward propagation of stresses will be ...
  • Railway Track Maintenance: Evaluation of Geogrid Benefits by Finite Element Analysis 
    Dimitrovová, Z.; Barroso, M. P. (4th International Conference on Maitenance Engineering, 2019-04)
    At the present time, railway transportation is facing several challenges. The reason is that there has been not much development regarding the railway track design, but significantly higher demands are imposed on its bearing ...
  • Sustainable Solutions of Railway Track Rehabilitation 
    Couto, P.; Fontul, S.; Barroso, M. P.; Falcão Silva, M. J.; Dimitrovová, Z. (EGU 2019 European Geosciences Union European Geosciences Union General Assembly, 2019-04)
    Considering the economic-financial crisis faced through Europe, all the railway rehabilitation projects stakeholders are concerned with the costs required to improve the railway systems. Additionally, following recent ...
  • Barragem de Pico da Urze: sistema de impermeabilização com geossintéticos 
    Barroso, M. P.; Caldeira, L.; Jeremias, T.; Ferreira, P.; França, P. (XI Simposio Nacional de Ingenierá Geotécnica, 2022-05)
    Barragem do Pico da Urze (BPU), localizada na ilha da Madeira (Portugal), foi concebida no âmbito da construção do Projeto de Ampliação do Aproveitamento Hidroelétrico da Calheta. O desenvolvimento deste projeto visou ...
  • Geosynthetics in the renewal of East Railway Line 
    Ribeiro, J.; Barroso, M. P. (10th International Conference on Wave Mechanics an Vibration, 2022-07)
    Geosynthetics have been widely used in various geotechnical engineering applications to enhance the strength of geosystems, as well as the fact that they are economical and relatively easy to install. Separation, filtration, ...
  • HDPE geomembrane”s behaviour after 20 years in service at Areias de Vilar Water Reservoir 
    Barroso, M. P.; Vale, J. (7th European Geosynthetics Conference, 2022-09)
    A high-density polyethylene geomembrane installed 20 years ago at Areias de Vilar Water Reservoir has experienced degradation and damages, such as tears, punctures and stress cracking. In order to study its behaviour, ...
  • PVC geomembranes in dams: influence of test temperature on seams peel and shear strength 
    Lopes, M. G.; Barroso, M. P. (7th European Geosynthetics Conference, 2022-09)
    The PVC geomembranes are the most commonly used for dams. The success of this waterproofing system depends on the quality of which the geomembranes seams are made. The seams must be evaluated in terms of continuity/watertightness ...