CO2 mineralisation of Portland cement: Towards understanding the mechanisms of enforced carbonation

MacIej Zajac; Aurore Lechevallier; Pawel Durdzinski; Frank Bullerjahn; Jørgen Skibsted; Mohsen Ben Haha

doi:10.1016/j.jcou.2020.02.015

CO2 mineralisation of Portland cement: Towards understanding the mechanisms of enforced carbonation

MacIej Zajac^*, Aurore Lechevallier, Pawel Durdzinski, Frank Bullerjahn, Jørgen Skibsted, Mohsen Ben Haha

^*Corresponding author for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

Abstract

Reductions of CO2 emissions associated with Portland cement production represent currently the main challenge for the cement industry. A promising approach is to substitute the traditional hydration of cement by carbonation of cement clinker for the hardening of the material in concrete production. This work is a tailor-made experimental approach to explore the mechanisms of Portland clinker carbonation under wet conditions. The carbonation is found to be fast at the beginning of the reaction, provided enough CO2 is present in the system. Particularly, the calcium silicate phases react rapidly, where the kinetics is explained by the high undersaturation of these phases. Furthermore, the carbonation reaction can be divided into three stages when the reaction is limited by the different mechanisms: Precipitation of products or dissolution of clinker or CO2. The main carbonation products are calcium carbonate and amorphous alumina silica gel. These phases precipitate in a different locations forming a special microstructural pattern.

Original language	English
Journal	Journal of CO2 Utilization
Volume	38
Pages (from-to)	398-415
Number of pages	18
ISSN	2212-9820
DOIs	https://doi.org/10.1016/j.jcou.2020.02.015
Publication status	Published - 2020

Keywords

Calcite Silica gel
Carbonation
Kinetics Calcium silicates

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10.1016/j.jcou.2020.02.015

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@article{442a7c07152b4d37a9a9983edeee0b64,

title = "CO2 mineralisation of Portland cement: Towards understanding the mechanisms of enforced carbonation",

abstract = "Reductions of CO2 emissions associated with Portland cement production represent currently the main challenge for the cement industry. A promising approach is to substitute the traditional hydration of cement by carbonation of cement clinker for the hardening of the material in concrete production. This work is a tailor-made experimental approach to explore the mechanisms of Portland clinker carbonation under wet conditions. The carbonation is found to be fast at the beginning of the reaction, provided enough CO2 is present in the system. Particularly, the calcium silicate phases react rapidly, where the kinetics is explained by the high undersaturation of these phases. Furthermore, the carbonation reaction can be divided into three stages when the reaction is limited by the different mechanisms: Precipitation of products or dissolution of clinker or CO2. The main carbonation products are calcium carbonate and amorphous alumina silica gel. These phases precipitate in a different locations forming a special microstructural pattern.",

keywords = "Calcite Silica gel, Carbonation, Kinetics Calcium silicates",

author = "MacIej Zajac and Aurore Lechevallier and Pawel Durdzinski and Frank Bullerjahn and J{\o}rgen Skibsted and {Ben Haha}, Mohsen",

year = "2020",

doi = "10.1016/j.jcou.2020.02.015",

language = "English",

volume = "38",

pages = "398--415",

journal = "Journal of CO2 Utilization",

issn = "2212-9820",

publisher = "Elsevier",

}

CO2 mineralisation of Portland cement: Towards understanding the mechanisms of enforced carbonation. / Zajac, MacIej; Lechevallier, Aurore; Durdzinski, Pawel et al.
In: Journal of CO2 Utilization, Vol. 38, 2020, p. 398-415.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

TY - JOUR

T1 - CO2 mineralisation of Portland cement

T2 - Towards understanding the mechanisms of enforced carbonation

AU - Zajac, MacIej

AU - Lechevallier, Aurore

AU - Durdzinski, Pawel

AU - Bullerjahn, Frank

AU - Skibsted, Jørgen

AU - Ben Haha, Mohsen

PY - 2020

Y1 - 2020

N2 - Reductions of CO2 emissions associated with Portland cement production represent currently the main challenge for the cement industry. A promising approach is to substitute the traditional hydration of cement by carbonation of cement clinker for the hardening of the material in concrete production. This work is a tailor-made experimental approach to explore the mechanisms of Portland clinker carbonation under wet conditions. The carbonation is found to be fast at the beginning of the reaction, provided enough CO2 is present in the system. Particularly, the calcium silicate phases react rapidly, where the kinetics is explained by the high undersaturation of these phases. Furthermore, the carbonation reaction can be divided into three stages when the reaction is limited by the different mechanisms: Precipitation of products or dissolution of clinker or CO2. The main carbonation products are calcium carbonate and amorphous alumina silica gel. These phases precipitate in a different locations forming a special microstructural pattern.

AB - Reductions of CO2 emissions associated with Portland cement production represent currently the main challenge for the cement industry. A promising approach is to substitute the traditional hydration of cement by carbonation of cement clinker for the hardening of the material in concrete production. This work is a tailor-made experimental approach to explore the mechanisms of Portland clinker carbonation under wet conditions. The carbonation is found to be fast at the beginning of the reaction, provided enough CO2 is present in the system. Particularly, the calcium silicate phases react rapidly, where the kinetics is explained by the high undersaturation of these phases. Furthermore, the carbonation reaction can be divided into three stages when the reaction is limited by the different mechanisms: Precipitation of products or dissolution of clinker or CO2. The main carbonation products are calcium carbonate and amorphous alumina silica gel. These phases precipitate in a different locations forming a special microstructural pattern.

KW - Calcite Silica gel

KW - Carbonation

KW - Kinetics Calcium silicates

UR - http://www.scopus.com/inward/record.url?scp=85086009196&partnerID=8YFLogxK

U2 - 10.1016/j.jcou.2020.02.015

DO - 10.1016/j.jcou.2020.02.015

M3 - Journal article

AN - SCOPUS:85086009196

SN - 2212-9820

VL - 38

SP - 398

EP - 415

JO - Journal of CO2 Utilization

JF - Journal of CO2 Utilization

ER -

CO2 mineralisation of Portland cement: Towards understanding the mechanisms of enforced carbonation

Abstract

Keywords

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