Pozzolanic Characterization of Cuban Bamboo Leaf Ash: Calcining Temperature and Kinetic Parameters

Autor(es)

Villar Cocina, Ernesto ^[1] ; Savastano, Holmer ^[2] ; Rodier, Loic ^[2] ; Lefran, Manuel ^[1] ; Frias, Moises ^[3]

Afiliação do(s) autor(es)

^[1] Cent Univ Las Villas, Dept Phys, Santa Clara, CA 54830 - USA

^[2] Univ Sao Paulo, POB 23, BR-13635900 Pirassununga, SP - Brazil

^[3] CSIC, Eduardo Torroja Inst, C Serrano Galvache 4, Madrid 28033 - Spain

• Tipo de documento: Artigo Científico
• Fonte: WASTE AND BIOMASS VALORIZATION; v. 9, n. 4, p. 691-699, APR 2018.
• Citações Web of Science: 4

Resumo

The paper presents a study of the pozzolanic activity of Cuban bamboo leaf ash. To evaluate the pozzolanic activity a conductometric method was used, which is based on the measurement of variation in electrical conductivity of a bamboo leaf ash (BLAsh)/lime solution with reaction time. Later, the kinetic parameters (in particular, the reaction rate constant and free energy of activation) are quantified by applying a kinetic-diffusive model. The pozzolanic activity is quantitatively evaluated according to the values obtained of the kinetic parameters. Other experimental techniques, such as X-ray diffraction and scanning electron microscopy, which complement the results coming from the conductometric method, were applied. Also, the paper reports on the influence of calcining temperature (500, 600 and 700 degrees C) on the pozzolanic activation of the bamboo leaves. The results show good pozzolanic properties of bamboo leaf ashes for temperatures between 500 and 700 degrees C, and only a little difference on the activation of bamboo leaf ash as a function of the calcining temperature applied. The BLAsh calcined at 500 degrees C showed the highest pozzolanic activity. (AU)

• Processo FAPESP: 11/12691-2 - Colaboração e assessoria em atividades relacionadas com projetos de pesquisa em andamento na temática: caracterização e avaliação de resíduos agrícolas como materiais pozolânicos para seu uso eficiente na produção de material de construção sustentável
• Beneficiário: Holmer Savastano Junior
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisador Visitante - Internacional
• Processo FAPESP: 12/51467-3 - Agroindustrial wastes and their potential use as appropriate materials for housing and infraestructure (Agrowaste)
• Beneficiário: Holmer Savastano Junior
• Modalidade de apoio: Auxílio à Pesquisa - Temático