Resumo

PIQUE, Teresa M.  e  VAZQUEZ, Analía. Uso de Espectroscopía Infrarroja con Transformada de Fourier (FTIR) en el estudio de la hidratación del cemento. Concr. cem. investig. desarro [online]. 2012, vol.3, n.2, pp.62-71. ISSN 2007-3011.

This work consists of a literature review on the use of Fourier Transform Infrared Spectroscopy (FTIR) as a possible technique to study the hydration of cement. We compared studies in which we studied the hydration of different pastes at early ages. It was also analyzed the growth of the hydration products when the cement is mixed with water. Cement pastes used in two of the works are modified with polymers, which can be seen by the delay in growth of one of the hydration products (calcium hydroxide) in time by action of the polymers within the cement matrix. Major peaks are: calcium hydroxide, gypsum, hydrated calcium silicate, calcium carbonate and the ettringite. The peak at 3643 cm^-1 corresponding to calcium hydroxide (Ca(OH)₂), which is formed while the silicate phases are dissolved. The gypsum generates a peak at 3550 cm^-1. The peaks at 1796, 2513, 2875, 2983 and 1350-1550 cm^-1 were due to calcium carbonate. The carbonates occur for wavenumbers 1428 cm^-1, 878 cm^-1 and 736 cm^-1. In the range of 970-1100 cm^-1 was observed an increase of calcium silicate hydrate (CSH) as hydration occurs. Peaks were detected at 1225 cm^-1 after hydration, which points to the early formation of ettringite.

Palavras-chave : infrared spectroscopy; cement hydration.

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