Development of low-pH cementitious materials for HLRW repositories. Resistance against ground waters aggression

Garcia Calvo, Jose Luis; Hidalgo, A.; Fernandez Luco, L. y Alonso Alonso, Maria Cruz (2010). Development of low-pH cementitious materials for HLRW repositories. Resistance against ground waters aggression. "Cement and Concrete Research", v. 40 (n. 8); pp. 1290-1297. ISSN 0008-8846. https://doi.org/10.1016/j.cemconres.2009.11.008.

Descripción

Título: Development of low-pH cementitious materials for HLRW repositories. Resistance against ground waters aggression
Autor/es:
  • Garcia Calvo, Jose Luis
  • Hidalgo, A.
  • Fernandez Luco, L.
  • Alonso Alonso, Maria Cruz
Tipo de Documento: Artículo
Título de Revista/Publicación: Cement and Concrete Research
Fecha: Agosto 2010
Volumen: 40
Materias:
Palabras Clave Informales: Low-pH cements; Hydration (A); Long-term performance (C); Radioactive waste (E)
Escuela: E.T.S.I. Caminos, Canales y Puertos (UPM)
Departamento: Ingeniería Civil: Construcción
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

One of the most accepted engineering construction concepts of underground repositories for high radioactive waste considers the use of low-pH cementitious materials. This paper deals with the design of those based on Ordinary Portland Cements with high contents of silica fume and/or fly ashes that modify most of the concrete “standard” properties, the pore fluid composition and the microstructure of the hydrated products. Their resistance to long-term groundwater aggression is also evaluated. The results show that the use of OPC cement binders with high silica content produces low-pH pore waters and the microstructure of these cement pastes is different from the conventional OPC ones, generating C–S–H gels with lower CaO/SiO2 ratios that possibly bind alkali ions. Leaching tests show a good resistance of low-pH concretes against groundwater aggression although an altered front can be observed

Más información

ID de Registro: 8750
Identificador DC: http://oa.upm.es/8750/
Identificador OAI: oai:oa.upm.es:8750
Identificador DOI: 10.1016/j.cemconres.2009.11.008
URL Oficial: http://www.sciencedirect.com/science/journal/00088846
Depositado por: Memoria Investigacion
Depositado el: 30 Sep 2011 08:31
Ultima Modificación: 20 Abr 2016 17:25
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