Surface structure changes in cement paste exposed to 10.6um laser radiation

J. J. Soto-Bernal; M. R. Moreno-Virgen; C. Frausto-Reyes; A. Bonilla-Petriciolet; J. T. Vega-Durán; J. Pineda-Piñón; J. A. Ortiz-Lozano

doi:10.1117/12.852953

3 December 2009 Surface structure changes in cement paste exposed to 10.6μm laser radiation

J. J. Soto-Bernal, M. R. Moreno-Virgen, C. Frausto-Reyes, A. Bonilla-Petriciolet, J. T. Vega-Durán, J. Pineda-Piñón, J. A. Ortiz-Lozano

Author Affiliations +

Proceedings Volume 7499, Seventh Symposium Optics in Industry; 74991D (2009) https://doi.org/10.1117/12.852953
Event: Seventh Symposium on Optics in Industry, 2009, Guadalajara, Jalisco, Mexico

Abstract

We report the changes occurring in cement pastes irradiated by 10.6μm CO₂ laser at different stages of hydration. Raman spectroscopy, X-rays and Scanning Electronic Microscopy (SEM) techniques had been used to observe molecular structural changes. Intensity of cement paste Raman peaks after laser irradiation was monitored in samples irradiated 2, 3, 4, 5, 6, 7, 8, 9, 10 and 11 days after their preparation. Applied laser power changed Raman peaks intensity at 187.5cm^-1, 563cm^-1, 695cm^-1, 750cm^-1, 897cm^-1, 1042cm^-1 and 1159cm^-1 that corresponds to compounds already presents in cement pastes. X ray diffraction and SEM images confirm the recrystalization of cement paste compounds into new phases (alite and belite) after irradiation. The produced changes show a clear dependence on the applied laser power density and age of samples.

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J. J. Soto-Bernal, M. R. Moreno-Virgen, C. Frausto-Reyes, A. Bonilla-Petriciolet, J. T. Vega-Durán, J. Pineda-Piñón, and J. A. Ortiz-Lozano "Surface structure changes in cement paste exposed to 10.6μm laser radiation", Proc. SPIE 7499, Seventh Symposium Optics in Industry, 74991D (3 December 2009); https://doi.org/10.1117/12.852953

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