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Title:
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Effect of drying and rewetting cycles on the structure and physicochemical characteristics of softwood fibres for reinforcement of cementitious composites
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Author:
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Claramunt Blanes, Josep; Ardanuy Raso, Mònica; García Hortal, José Antonio
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Other authors:
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Escola Superior d'Agricultura de Barcelona; Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica; Universitat Politècnica de Catalunya. Departament d'Enginyeria Tèxtil i Paperera; Universitat Politècnica de Catalunya. CIPAGRAF - Grup de Recerca Paperer i Gràfic; Universitat Politècnica de Catalunya. POLYCOM - Polimers i compòsits: tecnologia |
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Abstract:
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The changes produced in cellulosic fibres when they are subjected to successive drying and rewetting
cycles could have an important impact on the resistance and durability of cement mortar composites
based on these fibres. In this paper, unbleached, oxygen delignificated, semi-bleached, and fully bleached
softwood pulps have been subjected to drying and rewetting cycles and the corresponding dried pulps
characterized. The morphological structures and thermal stabilities were investigated with X-ray diffraction
and thermogravimetric analysis. While the water retention values decrease significantly with drying
and rewetting cycles, an overall increase in the crystallinity index and in the thermal stability was found
in the hornificated pulps. Natural fibres from cotton linters were also studied and the results compared
with the fibres from these softwood pulps. |
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Abstract:
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Peer Reviewed |
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Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria dels materials::Materials naturals
-Softwood
-Cement
-Softwood pulps
Cement mortar composites
Hornification
-Ciment
-Fusta |
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Rights:
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Document type:
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Article - Published version
Article |
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