Permeability and porosity improvement of grouted sand / Nadia Saiyouri in European journal of environmental and civil engineering, Vol. 15 N° 1 (Janvier 2011)  

Public ISBD [article]  inEuropean journal of environmental and civil engineering > Vol. 15 N° 1 (Janvier 2011) . - pp. 77-97 Titre : Permeability and porosity improvement of grouted sand Type de document : texte imprimé Auteurs : Nadia Saiyouri, Auteur ; Abdelghafour Ait Alaiwa, Auteur ; Hicher, Pierre-Yves, Auteur Année de publication : 2011 Article en page(s) : pp. 77-97 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Cement Injection Permeability Porosimetry Soil Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Over the past twenty years, grouting technology allowed to treat a wide range of subsurface conditions for construction. When a properly designed cement grout is injected into sand soil, homogeneous grout bulbs are formed which make dense and thus strengthen the surrounding soil. For successful grouting, the knowledge of subsurface conditions is important. Ground improvement can be assessed by permeability testing and mercury porosimetry testing. Laboratory experiments were conducted to examine grout injection through Loire sand columns under saturated conditions. These tests were performed in order to highlight the effect of some key factors: cement-to-water ratio, relative density of the granular skeleton on the properties of the grouted sand. Subsequently Mercury Intrusion Porosimetry tests showed that both porosity and its distribution are modified. Besides, the intrinsic permeability was measured by a gas permeability device. Then, an evaluation of intrinsic permeability using the Katz-Thompson equation on these tests is proposed and compared to gas permeability which is still commonly used in civil engineering to measure this intrinsic parameter. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=15665 [article] Permeability and porosity improvement of grouted sand [texte imprimé] / Nadia Saiyouri, Auteur ; Abdelghafour Ait Alaiwa, Auteur ; Hicher, Pierre-Yves, Auteur . - 2011 . - pp. 77-97. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 15 N° 1 (Janvier 2011) . - pp. 77-97 Mots-clés : Cement Injection Permeability Porosimetry Soil Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Over the past twenty years, grouting technology allowed to treat a wide range of subsurface conditions for construction. When a properly designed cement grout is injected into sand soil, homogeneous grout bulbs are formed which make dense and thus strengthen the surrounding soil. For successful grouting, the knowledge of subsurface conditions is important. Ground improvement can be assessed by permeability testing and mercury porosimetry testing. Laboratory experiments were conducted to examine grout injection through Loire sand columns under saturated conditions. These tests were performed in order to highlight the effect of some key factors: cement-to-water ratio, relative density of the granular skeleton on the properties of the grouted sand. Subsequently Mercury Intrusion Porosimetry tests showed that both porosity and its distribution are modified. Besides, the intrinsic permeability was measured by a gas permeability device. Then, an evaluation of intrinsic permeability using the Katz-Thompson equation on these tests is proposed and compared to gas permeability which is still commonly used in civil engineering to measure this intrinsic parameter. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=15665

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