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Effect of solution concentration on the attack of concrete by combined sulphate and chloride solutions / Manu Santhanam in European journal of environmental and civil engineering, Vol. 15 N° 7 (Août 2011) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 15 N° 7 (Août 2011) . - pp. 1003-1015 Titre : Effect of solution concentration on the attack of concrete by combined sulphate and chloride solutions Type de document : texte imprimé Auteurs : Manu Santhanam, Auteur Année de publication : 2011 Article en page(s) : pp. 1003-1015 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Sulphate  attack  Seawater  attack  Solution  concentration  Compressive  strength  Thermal  analysis  Microstructure Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Seawater attack presents a number of challenges to the concrete designer. The combined attack by sulphates and chlorides in seawater involves a complicated mechanism. In a number of cases, such as in outfall tunnels of seawater desalination projects, there is a possibility of encountering magnesium sulphate solutions (or magnesium brine solutions) having higher concentrations than seawater. This paper reports an experimental investigation to understand the influence of the solution concentration of seawater on the performance of cement mortars, through a combination of physical, chemical and microstructural analyses. Results indicate that higher concentrations of seawater do not cause the same level of damage as higher concentrations of groundwater relative to the typical seawater/groundwater solutions. The role of the brucite layer, formed on the surface during magnesium sulphate attack, is explored in detail to help understand the mechanisms governing the attack. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16503 [article] Effect of solution concentration on the attack of concrete by combined sulphate and chloride solutions [texte imprimé] / Manu Santhanam, Auteur . - 2011 . - pp. 1003-1015. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 15 N° 7 (Août 2011) . - pp. 1003-1015 Mots-clés : Sulphate  attack  Seawater  attack  Solution  concentration  Compressive  strength  Thermal  analysis  Microstructure Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Seawater attack presents a number of challenges to the concrete designer. The combined attack by sulphates and chlorides in seawater involves a complicated mechanism. In a number of cases, such as in outfall tunnels of seawater desalination projects, there is a possibility of encountering magnesium sulphate solutions (or magnesium brine solutions) having higher concentrations than seawater. This paper reports an experimental investigation to understand the influence of the solution concentration of seawater on the performance of cement mortars, through a combination of physical, chemical and microstructural analyses. Results indicate that higher concentrations of seawater do not cause the same level of damage as higher concentrations of groundwater relative to the typical seawater/groundwater solutions. The role of the brucite layer, formed on the surface during magnesium sulphate attack, is explored in detail to help understand the mechanisms governing the attack. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16503