Reaction mechanisms of wood ash for use as a partial cement replacement

Nina M. Sigvardsen; Mette R. Geiker; Lisbeth M. Ottosen

doi:10.1016/j.conbuildmat.2021.122889

Reaction mechanisms of wood ash for use as a partial cement replacement

Nina M. Sigvardsen^*, Mette R. Geiker, Lisbeth M. Ottosen

^*Corresponding author for this work

Norwegian University of Science and Technology

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

An increase in the produced amounts of wood ashes (WAs) is seen worldwide. In this study, the potential use of two representative WAs as a partial cement replacement is investigated. The WAs originate from combustion of wood chips by grate combustion (WA1) and circulating fluidised bed combustion (WA2). Both WAs were found to possess hydraulic properties, no pozzolanic properties were detected. A substantial difference in strength development was observed between WA1 and WA2 attributed to the phases formed; WA2 contributing the most, ettringite in addition to other phases were formed, while gypsum formed in WA1 pastes.

Original language	English
Article number	122889
Journal	Construction and Building Materials
Volume	286
Number of pages	11
ISSN	0950-0618
DOIs	https://doi.org/10.1016/j.conbuildmat.2021.122889
Publication status	Published - 2021

Bibliographical note

Funding Information:
Department of Civil Engineering at the Technical University of Denmark, Emineral A/S supported, Danielsen's Foundation and EKOKEM. The plants Värtaverket Combined Heat and Power Plant (Sweden) and Skærbæk Power Plant (Denmark) are acknowledged for supplying the investigated wood ashes.

Keywords

Compressive strength
Hydraulic activity
Phase development
Pozzolanic properties
Wood ash

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title = "Reaction mechanisms of wood ash for use as a partial cement replacement",

abstract = "An increase in the produced amounts of wood ashes (WAs) is seen worldwide. In this study, the potential use of two representative WAs as a partial cement replacement is investigated. The WAs originate from combustion of wood chips by grate combustion (WA1) and circulating fluidised bed combustion (WA2). Both WAs were found to possess hydraulic properties, no pozzolanic properties were detected. A substantial difference in strength development was observed between WA1 and WA2 attributed to the phases formed; WA2 contributing the most, ettringite in addition to other phases were formed, while gypsum formed in WA1 pastes.",

keywords = "Compressive strength, Hydraulic activity, Phase development, Pozzolanic properties, Wood ash",

author = "Sigvardsen, {Nina M.} and Geiker, {Mette R.} and Ottosen, {Lisbeth M.}",

note = "Funding Information: Department of Civil Engineering at the Technical University of Denmark, Emineral A/S supported, Danielsen's Foundation and EKOKEM. The plants V{\"a}rtaverket Combined Heat and Power Plant (Sweden) and Sk{\ae}rb{\ae}k Power Plant (Denmark) are acknowledged for supplying the investigated wood ashes. ",

year = "2021",

doi = "10.1016/j.conbuildmat.2021.122889",

language = "English",

volume = "286",

journal = "Construction and Building Materials",

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T1 - Reaction mechanisms of wood ash for use as a partial cement replacement

AU - Sigvardsen, Nina M.

AU - Geiker, Mette R.

AU - Ottosen, Lisbeth M.

N1 - Funding Information: Department of Civil Engineering at the Technical University of Denmark, Emineral A/S supported, Danielsen's Foundation and EKOKEM. The plants Värtaverket Combined Heat and Power Plant (Sweden) and Skærbæk Power Plant (Denmark) are acknowledged for supplying the investigated wood ashes.

PY - 2021

Y1 - 2021

N2 - An increase in the produced amounts of wood ashes (WAs) is seen worldwide. In this study, the potential use of two representative WAs as a partial cement replacement is investigated. The WAs originate from combustion of wood chips by grate combustion (WA1) and circulating fluidised bed combustion (WA2). Both WAs were found to possess hydraulic properties, no pozzolanic properties were detected. A substantial difference in strength development was observed between WA1 and WA2 attributed to the phases formed; WA2 contributing the most, ettringite in addition to other phases were formed, while gypsum formed in WA1 pastes.

AB - An increase in the produced amounts of wood ashes (WAs) is seen worldwide. In this study, the potential use of two representative WAs as a partial cement replacement is investigated. The WAs originate from combustion of wood chips by grate combustion (WA1) and circulating fluidised bed combustion (WA2). Both WAs were found to possess hydraulic properties, no pozzolanic properties were detected. A substantial difference in strength development was observed between WA1 and WA2 attributed to the phases formed; WA2 contributing the most, ettringite in addition to other phases were formed, while gypsum formed in WA1 pastes.

KW - Compressive strength

KW - Hydraulic activity

KW - Phase development

KW - Pozzolanic properties

KW - Wood ash

U2 - 10.1016/j.conbuildmat.2021.122889

DO - 10.1016/j.conbuildmat.2021.122889

M3 - Journal article

AN - SCOPUS:85102564131

SN - 0950-0618

VL - 286

JO - Construction and Building Materials

JF - Construction and Building Materials

M1 - 122889

ER -

Reaction mechanisms of wood ash for use as a partial cement replacement

Abstract

Bibliographical note

Keywords

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