Investigation of gas flow through soils and granular fill materials for the optimisation of radon soil depressurisation systems
| Autor: | Marta Fuente, Le Chi Hung, Borja Frutos, Isabel Sicilia, Mark Foley, Eduardo Muñoz, Jamie Goggins |
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| Přispěvatelé: | Ministerio de Economía y Competitividad (España), Consejo Superior de Investigaciones Científicas (España), National University of Ireland |
| Rok vydání: | 2019 |
| Předmět: |
010504 meteorology & atmospheric sciences
Health Toxicology and Mutagenesis chemistry.chemical_element Radon 010501 environmental sciences Experimental laboratory 01 natural sciences Permeability Soil Soil Pollutants Radioactive Environmental Chemistry Geotechnical engineering Waste Management and Disposal 0105 earth and related environmental sciences Experimental data Soil classification General Medicine Granular fill materials Pollution Finite element method Permeability (earth sciences) Models Chemical chemistry Soil water Slab Environmental science Soil depressurisation system Gases |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 2014-5888 |
| Popis: | The purpose of this study is to investigate gas flow through different types of granular fill materials and soil by means of a series of experimental laboratory tests, in relation to soil depressurisation systems for radon reduction under buildings and the soil surrounding the foundation. Gas permeability characterisation of materials used as granular fill material beneath the slab in buildings is a key parameter for the optimum performance of soil depressurisation systems to mitigate radon. A test apparatus was developed, adapted from previous studies, to measure the gas permeability of the samples and Finite Element Method numerical simulations were validated to simulate the flow behaviour through them. Theoretical expressions for permeability were discussed based on the analysis of experimental results and numerical simulations, finding that Darcy-Forchheimer equation provides the best match to the experimental results. Darcy's law also proved to be suitable for low gas velocities, whereas Ergun's equation resulted in a poor fit of the experimental data. Benchmark analysis of the granular fill materials under study and other European standards (Spanish, Irish and British) is also presented. This research was supported by the OPTI-SDS project, funded by the Irish Environmental Protection Agency [project code 2015-HW-MS-5], and the Spanish National Research Council [BIA2014-58887-R]. The work was performed in the Eduardo Torroja Institute for Construction Science (IETCC), Spain in collaboration with National University of Ireland, Galway. |
| Databáze: | OpenAIRE |
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