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

Znanstveni rad - Ostalo

• Autor: Ivan Gabrijel
• Autor: Marija Jelčić Rukavina
• Autor: Nina Štirmer
• Autorova ustanova: Sveučilište u Zagrebu; Građevinski fakultet
• Znanstveno / umjetničko područje, polje i grana: TEHNIČKE ZNANOSTI; Građevinarstvo

Sažetak (hrvatski)

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.

• Ključne riječi (hrvatski): biomass; wood fly ash; supplementary cementitious materials; filling mechanism
• Jezik: hrvatski
• Vrsta publikacije: Znanstveni rad - Ostalo
• Status objave: Objavljen
• Vrsta recenzije: Recenziran - međunarodna recenzija
• Verzija publikacije: Objavljena verzija rada (izdavačev PDF)
• Naslov časopisa: Materials
• Brojčani podaci: vol. 14, br. 23, str. 1-22
• p-ISSN: 1996-1944
• DOI: https://doi.org/10.3390/ma14237164
• URN:NBN: urn:nbn:hr:237:423458
• Datum objave publikacije: 2021-11-24
• Projekt: Šifra: IP-2016-06-7701; Naziv (hrvatski): Transformacija pepela iz drvene biomase u građevne kompozite s dodanom vrijednošću; Naziv (engleski): Transformation of Wood Biomass Ash into Resilient Construction Composites; Kratica: TAREC2; Voditelj: Nina Štirmer; Pravna nadležnost: Hrvatska; Financijer: Hrvatska zaklada za znanost; Linija financiranja: Research Projects
• URL dokumenta: https://www.mdpi.com/1996-1944/14/23/7164
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Datum i vrijeme pohrane: 2024-07-10 11:56:08