Influence of bagasse ash with different fineness on alkali-silica reactivity of mortar

S. Ramjan; W. Tangchirapat; C. Jaturapitakkul

doi:10.3989/mc.2018.08617

Autores/as

S. Ramjan Department of Civil Engineering, Faculty of Engineering, King Mongkut’s. University of Technology Thonburi (KMUTT) https://orcid.org/0000-0003-3078-6641
W. Tangchirapat Department of Civil Engineering, Faculty of Engineering, King Mongkut’s. University of Technology Thonburi (KMUTT) https://orcid.org/0000-0002-4917-1367
C. Jaturapitakkul Department of Civil Engineering, Faculty of Engineering, King Mongkut’s. University of Technology Thonburi (KMUTT) https://orcid.org/0000-0002-8785-947X

DOI:

https://doi.org/10.3989/mc.2018.08617

Palabras clave:

Reacción álcali-sílice, Ceniza de bagazo, Resistencias a compresión, Finura, Mortero

Resumen

Esta investigación tiene como objetivo estudiar el efecto de la finura de la ceniza de bagazo (BGA) en la reacción álcali-sílice del mortero. La muestra de BGA fue molida para conseguir partículas retenidas en un tamiz No. 325 de 33 ±1% y 5±1% en peso. Las muestras de BGA molidas fueron utilizadas separadamente para reemplazar el cemento Portland en proporciones del 10, 20, 30 y 40% en peso en el mortero. Se estudiaron tanto las resistencias a compresión como la reacción álcali-sílice (RAS) de los morteros. Los resultados indicaron que la utilización de un tamaño mayor de las partículas de BGA no es recomendable para disminuir la RAS ya que conlleva a una disminución de las resistencias a compresión y a una alta expansión debido a la RAS. Los morteros que contenían BGA de una mayor finura exhibían mayor resistencia a compresión y una menor expansión, debido a la RAS, que los morteros que contenían BGA de menor finura. Al mismo tiempo los resultados sugieren que el BGA molido retenido en un tamiz No. 325 de menos de un 5% en peso es apropiado para ser usado como material puzolánico, ya que provee una gran resistencia y reduce la expansión del mortero producido por la RAS a pesar de contener una alta pérdida por calcinación. Los resultados obtenidos también recomiendan la utilización eficiente del BGA molido ya que conlleva una disminución de los desechos de las cenizas de bagazo.

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