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STUDY OF WOOD WASTE ASH AS A POZZOLANIC ADDITION



Author(s): Matos, A. M., Ramos, T. and Sousa-Coutinho, J.
Paper category: Conference
Book title: XIII International Conference on Durability of Building Materials and Components - XIII DBMC
Editor(s): Marco Quattrone, Vanderley M. John
Print ISBN: none
e-ISBN: 978-2-35158-149-0
Publication year: 2015
Pages: 850-857
Total Pages: 8
Language: English


Abstract: Portland cement production is an energy-intensive industry, responsible for about 5% of the global anthropogenic carbon dioxide emissions. The present work deals with comparing effect on strength and durability of wood ash from a timber processing industry and a wood bottom ash from a grate operated biomass power plant. Various tests enabled physical and chemical characterization of these materials, including pozzolanic activity, chemical analyses and laser particle size distribution. Strength and durability properties were assessed on mortar, including carbonation, ASR and chloride penetration. Both wood ashes used as cement replacement in mortar indicated marginal or no loss in terms of strength, expected reduction in carbonation resistance and improved ASR resistance with increased replacement. Chloride resistance reduced for the non pozzolanic wood ash but increased for the pozzolanic ash. Wood waste ash is a complex waste material demanding prior assessment of effect in mortar and concrete for use as cement replacement for sustainability in construction.


Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00