Efecto del contenido de aluminato de estroncio y hemihidrato sobre las propiedades de un cemento de sulfoaluminato de calcio

Autores/as

  • G. Velazco Cinvestav Saltillo
  • J. M. Almanza Cinvestav Saltillo
  • D. A. Cortés Cinvestav Saltillo
  • J. C. Escobedo Cinvestav Saltillo
  • J. I. Escalante-Garcia Cinvestav Saltillo

DOI:

https://doi.org/10.3989/mc.2014.04413

Palabras clave:

Aluminato de estroncio, Etringita, Sulfoaluminato

Resumen


Se investigó el efecto de la adición de aluminato de estroncio (SrAl2O4) sobre las propiedades de un cemento de sulfoaluminato de calcio (C4A3Ŝ). Se prepararon muestras mezclando C4A3Ŝ, hemihidrato (CaSO4· ½H2O, CŜH0.5) y 0, 10 o 20% e.p de SrAl2O4 (SrA). La cantidad de CŜH0.5 fue de 15, 20 o 25% e.p. basado en la cantidad de C4A3Ŝ. Las relaciones agua/cemento utilizadas fueron 0.4 y 0.5. Las muestras fueron curadas hasta 28 d. Se evaluó el tiempo de fraguado y la resistencia a la compresión. Los productos de hidratación se caracterizaron mediante DRX y MEB. El tiempo de fraguado se retardó hasta 42 minutos con la adición del SrAl2O4 comparado con las muestras sin adiciones. Las muestras con 25% e.p. de yeso y 20% e.p. de SrAl2O4 desarrollaron la mayor resistencia a la compresión alcanzando 60 MPa a 28 d de curado. Los análisis por MEB y DRX muestran como principal producto de hidratación a la etringita (C63H32), cuya morfología se observa como cristales aciculares.

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Publicado

2014-09-30

Cómo citar

Velazco, G., Almanza, J. M., Cortés, D. A., Escobedo, J. C., & Escalante-Garcia, J. I. (2014). Efecto del contenido de aluminato de estroncio y hemihidrato sobre las propiedades de un cemento de sulfoaluminato de calcio. Materiales De Construcción, 64(315), e024. https://doi.org/10.3989/mc.2014.04413

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