Caracterización físico-química y radiológica de un caolín y sus productos de polimerización
DOI:
https://doi.org/10.3989/mc.2018.00517Palabras clave:
Metacaolin, Materiales amorfos, Reacción árido-alcali, Curado, Difracción de rayos X (XRD)Resumen
El objetivo de este estudio fue la determinación de las características físico-químicas y radiológicas del caolín y los productos resultantes de la activación alcalina (geopolímero). Además, el objetivo de la investigación fue investigar la posibilidad de la aplicación de caolín como pigmento o como materia prima para obtener materiales geopoliméricos relativamente nuevos en una industria de materiales de construcción. La caracterización fisicoquímica de las muestras se realizó mediante difracción de rayos X (XRD), espectroscopía infrarroja por transformada de Fourier (FTIR) y espectroscopía fotoelectrónica de rayos X (XPS). Se determinó la concentración de actividad de radionucleidos naturales en caolín, metacaolín y geopolímero. La tasa de dosis absorbida (D) y la tasa de dosis efectiva anual (EDR), calculada de acuerdo con el informe de UNSCEAR 2000, también se presentan en este trabajo. El caolín se trató térmicamente a 750 ° C y la actividad específica del radionucleido natural en el metacaolín aumentó hasta 1.6, mientras que las actividades específicas medidas en el geopolímero fueron las más bajas.
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