Workability, Strength and Drying Shrinkage of Structural Mortar Containing Forest Biomass Ash in Partial Replacement of Cement

Abstract:

Aim of this work is to investigate the feasibility to implement structural mortar containing forest biomass ash (FBA), produced by a local power plant, in partial replacement of cement. Chemical composition, morphology and pozzolanicity of ash have been evaluated using Energy Dispersive X-ray analysis (EDX), SEM and Chapelle test respectively. Furthermore, fresh state properties and drying shrinkage, compressive and flexural strength of the mortars at different curing times have been investigated. Forest biomass ash at replacement levels of 0%, 10%, 20% e 30% by total binder weight has been used. FBA has been found to show only a very moderate pozzolanicity, while it adversely affect workability of the fresh mortar and compressive strength and drying shrinkage of the hardened mortar. Nevertheless, at a replacement level of 30%wt and after 28 days of curing, mortar showed a compressive strength above 30MPa.

• Periodical: Advanced Materials Research (Volume 1051)
• Pages: 737-742
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1051.737
• Online since: October 2014
• Authors: Sebastiano Candamano*, Fortunato Crea, Dolores Romano, Ivan Iacobini
• Keywords: Drying Shrinkage, Forest Biomass Ash, Strength, Structural Mortar

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