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Título: | FTIR study of the effect of temperature and nanosilica on the nano structure of C-S-H gel formed by hydrating tricalcium silicate |
Autor: | Sáez del Bosque, Isabel F. CSIC ORCID; Martínez-Ramírez, S. CSIC ORCID ; Blanco-Varela, María Teresa CSIC ORCID | Palabras clave: | C–S–H gel FTIR Temperatures Jennite and tobermorite structures Tricalcium silicate Nanosilica |
Fecha de publicación: | 2014 | Editor: | Elsevier | Citación: | Construction and Building Materials 52: 314- 323 (2014) | Resumen: | Fourier transform infrared spectroscopy (FTIR) was used to explore the effect of temperature (25, 40 and 65 C) and the presence of amorphous nanosilica (nSA) on the nanostructure of the C-S-H gel generated during tricalcium silicate (C3S) hydration. Rising temperatures were shown to modify the nanostructure of C-S-H gel. The bands at around 1076 cm-1, 909 cm-1 and 540 cm-1 that appeared on the FTIR spectrum for C3S paste with rising temperatures were attributed to the formation a jennite-like structure. Moreover, irrespective of temperature, as the reaction progressed, the initial tobermorite-like C-S-H gel changed to a jennite-like structure. With the addition of nSA, the band generated at 960-970 cm -1 appeared from the first day of hydration, an indication that nanosilica accelerates C3S hydration. The presence of nSA induced no narrowing of the bands at 1076 cm-1 or 909 cm -1 at any curing time, a sign that these gels had a smaller proportion of jennite-like species than the gels in the nSA-free pastes. Finally, compositional date of C-S-H was provides. © 2013 Elsevier Ltd. | URI: | http://hdl.handle.net/10261/110275 | DOI: | 10.1016/j.conbuildmat.2013.10.056 | Identificadores: | doi: 10.1016/j.conbuildmat.2013.10.056 issn: 0950-0618 |
Aparece en las colecciones: | (IETCC) Artículos (CFMAC-IEM) Artículos |
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