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

Scientific paper - Other

• Author: Ivan Gabrijel
• Author: Marija Jelčić Rukavina
• Author: Nina Štirmer
• Author's institution: University of Zagreb; Faculty of Civil Engineering
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Civil Engineering

Abstract (croatian)

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.

• Keywords (croatian): biomass; wood fly ash; supplementary cementitious materials; filling mechanism
• Language: croatian
• Publication type: Scientific paper - Other
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Materials
• Numbering: vol. 14, no. 23, pp. 1-22
• p-ISSN: 1996-1944
• DOI: https://doi.org/10.3390/ma14237164
• URN:NBN: urn:nbn:hr:237:423458
• Publication: 2021-11-24
• Project: Number: IP-2016-06-7701; Title (croatian): Transformacija pepela iz drvene biomase u građevne kompozite s dodanom vrijednošću; Title (english): Transformation of Wood Biomass Ash into Resilient Construction Composites; Acronym: TAREC2; Leader: Nina Štirmer; Jurisdiction: Croatia; Funding stream: Research Projects
• Document URL: https://www.mdpi.com/1996-1944/14/23/7164
• Type of resource: Text
• Access conditions: Open access
• Created on: 2024-07-10 11:56:08