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

By J. Calvo, A. Hidalgo, C. Alonso, L. Luco. 2010

177 citations recorded by the source corpus.

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/SiO{sub 2} 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.

Subfields: Civil and Structural Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/438bdb9c5d2eaf4da27526e989d47bd015be6a32

Citations in the corpus

• The pore solution of blended cements: a review (2016, unknown): “2 [2, 5, 7, 8, 13, 15, 16, 25, 28, 29, 31, 33, 40, 41] 3360 Materials and Structures (2016) 49:3341–3367”