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Embedded NMR sensors to monitor evaporable water loss caused by hydration and drying in Portland cement mortar / P.F. de J. Cano-Barrita in Cement and concrete research, Vol. 39 N° 4 (Avril 2009) 

Public ISBD [article]  in Cement and concrete research > Vol. 39 N° 4 (Avril 2009) . - pp. 324–328 Titre : Embedded NMR sensors to monitor evaporable water loss caused by hydration and drying in Portland cement mortar Type de document : texte imprimé Auteurs : P.F. de J. Cano-Barrita, Auteur Année de publication : 2009 Article en page(s) : pp. 324–328 Langues : Anglais (eng) Mots-clés : A:  Drying;  Hydration;  Pore  size  distribution;  Mortar;  Embedded  NMR  sensor Résumé : Providing adequate moisture content in cement-based materials is important during hydration of the cement paste to ensure proper development of their mechanical and durability properties. Subsequently, water is involved in the deterioration of concrete either as a pure liquid or by carrying aggressive species. This paper explores the use of small embedded NMR sensors to monitor evaporable water loss in Portland cement mortars. Results indicate that these sensors are effective in detecting loss of evaporable water due to hydration and drying. During drying, the mass loss is linearly proportional to the NMR signal loss. In addition, the amount of evaporable water detected with the sensor has a good correlation with the amount of evaporable water in a companion specimen tested in a traditional low field magnet by NMR and by gravimetric measurements. ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609000210 [article] Embedded NMR sensors to monitor evaporable water loss caused by hydration and drying in Portland cement mortar [texte imprimé] / P.F. de J. Cano-Barrita, Auteur . - 2009 . - pp. 324–328. Langues : Anglais (eng) in Cement and concrete research > Vol. 39 N° 4 (Avril 2009) . - pp. 324–328 Mots-clés : A:  Drying;  Hydration;  Pore  size  distribution;  Mortar;  Embedded  NMR  sensor Résumé : Providing adequate moisture content in cement-based materials is important during hydration of the cement paste to ensure proper development of their mechanical and durability properties. Subsequently, water is involved in the deterioration of concrete either as a pure liquid or by carrying aggressive species. This paper explores the use of small embedded NMR sensors to monitor evaporable water loss in Portland cement mortars. Results indicate that these sensors are effective in detecting loss of evaporable water due to hydration and drying. During drying, the mass loss is linearly proportional to the NMR signal loss. In addition, the amount of evaporable water detected with the sensor has a good correlation with the amount of evaporable water in a companion specimen tested in a traditional low field magnet by NMR and by gravimetric measurements. ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609000210