Os aterros sanitários incluem duas barreiras de impermeabilização designadas, em função das acções desenvolvida, barreira passiva e barreira activa. A barreira passiva é constituída por uma camada de argila, reforçada ...

Os geocompósitos drenantes são materiais constituídos por um núcleo drenante e por, pelo menos, um filtro. São utilizados em engenharia para o escoamento de água no seu plano. Contudo, o seu desempenho pode ficar comprometido ...

Composite liners comprising a geomembrane (GM) with a circular hole, a geosynthetic clay liner (GCL) and a compacted clay liner were studied in tests conducted at three scales to measure the flow rates at the interface ...

Since nothing is absolutely impermeable, the knowledge of the permeability coefficients of geomembranes to gases or liquids is required to assess its effectiveness, especially in the seamed area. In order to determine the ...

Designing a geotextile for filtration applications requires information on the characteristic opening size of the geotextile. Several techniques are available for measuring the characteristic opening size, but there is ...

Preliminary laboratory tests for studying the influence of the pre-hydration of GCLs on the leakage rates through composite liners due to holes in geomembrane were carried out. À stitch and a needle punched product were ...

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 ...

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 ...

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 ...

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, ...