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Article

Influence of Wood Fly Ash on Concrete Properties through Filling Effect Mechanism

Faculty of Civil Engineering, University of Zagreb, Fra Andrije Kačića Miošića 26, 10000 Zagreb, Croatia
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Academic Editor: Francisco Agrela
Materials 2021, 14(23), 7164; https://doi.org/10.3390/ma14237164
Received: 4 November 2021 / Revised: 17 November 2021 / Accepted: 22 November 2021 / Published: 24 November 2021
This paper presents the results of an experimental study aimed at determining the influence of wood fly ash (WFA) from three Croatian power plants on the properties of concrete. First, the chemical and physical properties of WFA’s were determined. It was found that these properties are highly influenced by combustion technology, the type and parts of wood used as fuel, and the local operating conditions. Subsequently, workability, heat of hydration, stiffness development, 28-day compressive strength, apparent porosity, and capillary absorption were determined on concrete mixes prepared with WFA as cement replacement from 5–45% by weight. Cement replacement up to 15% with the finest WFA accelerated hydration, stiffness development, and increased compressive strength of concrete up to 18%, while replacement with coarser WFA’s led to a decrease in compressive strength of up to 5% and had more gradual heat liberation. The dominant effect that could explain these findings is attributed to the filler and filling effect mechanisms. At the same time replacement content of up to 45% had very little effect on capillary absorption and could give concrete with sufficiently high compressive strength to be suitable for construction purposes. View Full-Text
Keywords: biomass; wood fly ash; supplementary cementitious materials; filling mechanism biomass; wood fly ash; supplementary cementitious materials; filling mechanism
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MDPI and ACS Style

Gabrijel, I.; Jelčić Rukavina, M.; Štirmer, N. Influence of Wood Fly Ash on Concrete Properties through Filling Effect Mechanism. Materials 2021, 14, 7164. https://doi.org/10.3390/ma14237164

AMA Style

Gabrijel I, Jelčić Rukavina M, Štirmer N. Influence of Wood Fly Ash on Concrete Properties through Filling Effect Mechanism. Materials. 2021; 14(23):7164. https://doi.org/10.3390/ma14237164

Chicago/Turabian Style

Gabrijel, Ivan, Marija Jelčić Rukavina, and Nina Štirmer. 2021. "Influence of Wood Fly Ash on Concrete Properties through Filling Effect Mechanism" Materials 14, no. 23: 7164. https://doi.org/10.3390/ma14237164

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