Evaluación de la puzolanicidad de material obtenido en la calcinación simultánea de biomasa y arcilla caolinítica
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Uchima Quintero, Juan Sebastián
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En este trabajo se analizó la puzolanicidad del material obtenido en calcinación simultánea de arcilla caolinítica y biomasa. Se efectuaron calcinaciones de estos dos materiales de forma conjunta y para efectos de comparación, de forma aislada a temperaturas de 670°c y 750°c, con tiempo de residencia de 2 horas. Se prepararon pastas de cemento, pastas de cal y morteros de cemento usando los materiales con dos niveles de sustitución (10% y 20%) para analizar su potencial como materiales cementantes suplementarios, mediante técnicas como difracción de rayos X, análisis termogravimétrico, calorimetría isotérmica y ensayos de resistencia a compresión. Se encontró que los materiales analizados presentan una actividad puzolánica relevante a partir de 7 días de curado, causando en general un desempeño del cemento adicionado similar o mejor que el del cemento control y el del cemento adicionado con materiales obtenidos en calcinaciones aisladas.
Abstract:in this study the pozzolanicity of a material obtained in simultaneous calcination of kaolinitic clay and biomass was analyzed. Simultaneous calcinations and for comparative purposes, isolated calcinations of these materials were performed (670°c and 750°c, with a residence time of 2 hours). Cement pastes, lime pastes and cement mortars were prepared using the materials with two levels of substitution (10% and 20%), to analyze its potential as supplementary cementitious materials with techniques such as X ray diffraction, thermogravimetric analysis, isothermal calorimetry and compressive strength measurements. It was found that the materials analyzed present a relevant pozzolanic activity from 7 days of curing, causing in general a similar or better performance of blended cement than in the control cement or the cement blended with materials obtained in isolated calcinations.
Abstract:in this study the pozzolanicity of a material obtained in simultaneous calcination of kaolinitic clay and biomass was analyzed. Simultaneous calcinations and for comparative purposes, isolated calcinations of these materials were performed (670°c and 750°c, with a residence time of 2 hours). Cement pastes, lime pastes and cement mortars were prepared using the materials with two levels of substitution (10% and 20%), to analyze its potential as supplementary cementitious materials with techniques such as X ray diffraction, thermogravimetric analysis, isothermal calorimetry and compressive strength measurements. It was found that the materials analyzed present a relevant pozzolanic activity from 7 days of curing, causing in general a similar or better performance of blended cement than in the control cement or the cement blended with materials obtained in isolated calcinations.
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Cemento adicionado; Arcilla caolinítica; Cascarilla de arroz; Puzolanicidad; Análisis termogravimétrico; Resistencia a compresión; Materiales cementantes suplementarios; Blended Cement; Kaolinitic clay; Rice husk; Pozzolanicity; Thermogravimetric analysis; Compressive strength; Supplementary cementitious materials