Characterization of coal bio ash from wood pellets and low-alkali coal fly ash and use as partial cement replacement in mortar

Nina Marie Sigvardsen*, Lisbeth M. Ottosen

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Coal is increasingly replaced by biomass at the power plants. This results in new types of fly ashes, e.g. coal bio ash (CBA), where low-alkali coal fly ash (CFA) is injected to the boiler furnace during incineration of wood pellets to hinder corrosion and maintain the necessary thermal efficiency of the fuel. An assessment of the properties of this new type of ash is important for the utilization of this resource. This study reports an investigation of the filler behaviour and pozzolanic activity of CBA, when used as a partial cement replacement. Traditional CFA was used for comparison and CBA was shown to be a more favourable substitute compared to CFA. This study has shown, that by injecting CFA into the boiler furnace, wood fly ash is transformed from being a waste by-product, into a usable resource in concrete production.
Original languageEnglish
JournalCement and Concrete Composites
Volume95
Pages (from-to)25-32
ISSN0958-9465
DOIs
Publication statusPublished - 2019

Keywords

  • Filler
  • Pozzolan
  • Portland cement
  • Coal bio ash
  • Coal fly ash
  • Sustainability

Cite this

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title = "Characterization of coal bio ash from wood pellets and low-alkali coal fly ash and use as partial cement replacement in mortar",
abstract = "Coal is increasingly replaced by biomass at the power plants. This results in new types of fly ashes, e.g. coal bio ash (CBA), where low-alkali coal fly ash (CFA) is injected to the boiler furnace during incineration of wood pellets to hinder corrosion and maintain the necessary thermal efficiency of the fuel. An assessment of the properties of this new type of ash is important for the utilization of this resource. This study reports an investigation of the filler behaviour and pozzolanic activity of CBA, when used as a partial cement replacement. Traditional CFA was used for comparison and CBA was shown to be a more favourable substitute compared to CFA. This study has shown, that by injecting CFA into the boiler furnace, wood fly ash is transformed from being a waste by-product, into a usable resource in concrete production.",
keywords = "Filler, Pozzolan, Portland cement, Coal bio ash, Coal fly ash, Sustainability",
author = "Sigvardsen, {Nina Marie} and Ottosen, {Lisbeth M.}",
year = "2019",
doi = "10.1016/j.cemconcomp.2018.10.005",
language = "English",
volume = "95",
pages = "25--32",
journal = "Cement and Concrete Composites",
issn = "0958-9465",
publisher = "Pergamon Press",

}

TY - JOUR

T1 - Characterization of coal bio ash from wood pellets and low-alkali coal fly ash and use as partial cement replacement in mortar

AU - Sigvardsen, Nina Marie

AU - Ottosen, Lisbeth M.

PY - 2019

Y1 - 2019

N2 - Coal is increasingly replaced by biomass at the power plants. This results in new types of fly ashes, e.g. coal bio ash (CBA), where low-alkali coal fly ash (CFA) is injected to the boiler furnace during incineration of wood pellets to hinder corrosion and maintain the necessary thermal efficiency of the fuel. An assessment of the properties of this new type of ash is important for the utilization of this resource. This study reports an investigation of the filler behaviour and pozzolanic activity of CBA, when used as a partial cement replacement. Traditional CFA was used for comparison and CBA was shown to be a more favourable substitute compared to CFA. This study has shown, that by injecting CFA into the boiler furnace, wood fly ash is transformed from being a waste by-product, into a usable resource in concrete production.

AB - Coal is increasingly replaced by biomass at the power plants. This results in new types of fly ashes, e.g. coal bio ash (CBA), where low-alkali coal fly ash (CFA) is injected to the boiler furnace during incineration of wood pellets to hinder corrosion and maintain the necessary thermal efficiency of the fuel. An assessment of the properties of this new type of ash is important for the utilization of this resource. This study reports an investigation of the filler behaviour and pozzolanic activity of CBA, when used as a partial cement replacement. Traditional CFA was used for comparison and CBA was shown to be a more favourable substitute compared to CFA. This study has shown, that by injecting CFA into the boiler furnace, wood fly ash is transformed from being a waste by-product, into a usable resource in concrete production.

KW - Filler

KW - Pozzolan

KW - Portland cement

KW - Coal bio ash

KW - Coal fly ash

KW - Sustainability

U2 - 10.1016/j.cemconcomp.2018.10.005

DO - 10.1016/j.cemconcomp.2018.10.005

M3 - Journal article

VL - 95

SP - 25

EP - 32

JO - Cement and Concrete Composites

JF - Cement and Concrete Composites

SN - 0958-9465

ER -