A Comparative Study on the Pozzolanic Activity Between Bamboo Leaves Ash and Silica Fume: Kinetic Parameters

作者: Ernesto Villar-Cociña , Loic Rodier , Holmer Savastano , Manuel Lefrán , Moisés Frías Rojas

DOI: 10.1007/S12649-018-00556-Y

关键词: BambooPozzolanic reactionScanning electron microscopePozzolanReaction rate constantChemical engineeringElectrical resistivity and conductivitySilica fumePozzolanic activityMaterials science

摘要: Silica fume is the most performing siliceous product among pozzolanic materials. This mainly related to his high content (around of 90%) amorphous silica. However, this residue has a cost and quantities available are limited. limits its use in modern construction industry, particularly developing countries. For reason it motivating look for an alternative replace with other waste materials similar behavior, especially these It known that bamboo leaf ash (BLAsh) pozzolan reactivity, possessing amount The paper presents qualitative quantitative characterization reactivity silica (SF). activity evaluated by using conductometric method. In method electrical conductivity BLAsh/Ca(OH)2 SF/Ca(OH)2 solution measured reaction time. Latter, kinetic-diffusive model applied which allows computing kinetic parameters reaction. values parameters, specifically rate constant, characterize reacting process allow evaluating quantitatively application experimental techniques employed research [X-ray diffraction (XRD) scanning electron microscopy (SEM)], support results coming from show BLAsh SF formed fundamentally activity. comparison concluding both have constant 4.78 × 10−1 5.11 × 10−1 h−1 respectively. fact reveals importance agricultural their manufacture blended cements.

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