Carbonation investigation on atmospherically exposed lime-treated silty soil

Geetanjali Das; Andry Razakamanantsoa; Lucile Saussaye; Francesca Losma; Dimitri Deneele

doi:10.1016/j.cscm.2022.e01222

Carbonation investigation on atmospherically exposed lime-treated silty soil

Geetanjali Das, Andry Razakamanantsoa, Lucile Saussaye, Francesca Losma, Dimitri Deneele

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

The effect of carbonation on a one-year atmospherically exposed lime-treated soil structure is investigated. The investigation involves analyzing the chemical characteristics and pore-structure modifications of several specimens sampled up to 12 cm depth perpendicular to the surface. On comparing the analysis with untreated and lime-treated core-sampled specimens, carbonation is found to have occurred on specimens sampled up to 4.2 cm depth perpendicular to the surface. The decrease in soil pH to a value 9 or lower than that and the presence of carbonates confirmed the carbonation effect. At the pore-structure level, carbonation mechanism is found to increase macropores of diameter 20000–100000 Å, which is missing in the non-carbonated specimens and even greater than the one found at untreated soil. Such an observation confirmed the loss of cementitious compounds due to carbonation, thus, converting the mesopores developed due to lime treatment to macropores of larger pore diameter.

Original language	English
Article number	e01222
Number of pages	7
Journal	Case Studies in Construction Materials
Volume	17
Early online date	9 Jun 2022
DOIs	https://doi.org/10.1016/j.cscm.2022.e01222
Publication status	Published - 1 Dec 2022
Externally published	Yes

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10.1016/j.cscm.2022.e01222Licence: CC BY-NC-ND

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title = "Carbonation investigation on atmospherically exposed lime-treated silty soil",

abstract = "The effect of carbonation on a one-year atmospherically exposed lime-treated soil structure is investigated. The investigation involves analyzing the chemical characteristics and pore-structure modifications of several specimens sampled up to 12 cm depth perpendicular to the surface. On comparing the analysis with untreated and lime-treated core-sampled specimens, carbonation is found to have occurred on specimens sampled up to 4.2 cm depth perpendicular to the surface. The decrease in soil pH to a value 9 or lower than that and the presence of carbonates confirmed the carbonation effect. At the pore-structure level, carbonation mechanism is found to increase macropores of diameter 20000–100000 {\AA}, which is missing in the non-carbonated specimens and even greater than the one found at untreated soil. Such an observation confirmed the loss of cementitious compounds due to carbonation, thus, converting the mesopores developed due to lime treatment to macropores of larger pore diameter.",

keywords = "Atmospherically exposed, Calcium carbonates, Carbonation, Lime-treated soil, Macropores, Soil pH",

author = "Geetanjali Das and Andry Razakamanantsoa and Lucile Saussaye and Francesca Losma and Dimitri Deneele",

note = "Funding Information: This work was financially supported by Association Nationale de la Recherche et de la Technologie with grant N˚ 2018/0219 and Lhoist Southern Europe with grant N˚ RP2-E18114 . The authors are very thankful to the research team of Lhoist Belgium, and CEREMA Blois, France for their great support in performing field sampling, laboratory experiments, and technical support. Publisher Copyright: {\textcopyright} 2022 The Authors",

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doi = "10.1016/j.cscm.2022.e01222",

language = "English",

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TY - JOUR

T1 - Carbonation investigation on atmospherically exposed lime-treated silty soil

AU - Das, Geetanjali

AU - Razakamanantsoa, Andry

AU - Saussaye, Lucile

AU - Losma, Francesca

AU - Deneele, Dimitri

N1 - Funding Information: This work was financially supported by Association Nationale de la Recherche et de la Technologie with grant N˚ 2018/0219 and Lhoist Southern Europe with grant N˚ RP2-E18114 . The authors are very thankful to the research team of Lhoist Belgium, and CEREMA Blois, France for their great support in performing field sampling, laboratory experiments, and technical support. Publisher Copyright: © 2022 The Authors

PY - 2022/12/1

Y1 - 2022/12/1

N2 - The effect of carbonation on a one-year atmospherically exposed lime-treated soil structure is investigated. The investigation involves analyzing the chemical characteristics and pore-structure modifications of several specimens sampled up to 12 cm depth perpendicular to the surface. On comparing the analysis with untreated and lime-treated core-sampled specimens, carbonation is found to have occurred on specimens sampled up to 4.2 cm depth perpendicular to the surface. The decrease in soil pH to a value 9 or lower than that and the presence of carbonates confirmed the carbonation effect. At the pore-structure level, carbonation mechanism is found to increase macropores of diameter 20000–100000 Å, which is missing in the non-carbonated specimens and even greater than the one found at untreated soil. Such an observation confirmed the loss of cementitious compounds due to carbonation, thus, converting the mesopores developed due to lime treatment to macropores of larger pore diameter.

AB - The effect of carbonation on a one-year atmospherically exposed lime-treated soil structure is investigated. The investigation involves analyzing the chemical characteristics and pore-structure modifications of several specimens sampled up to 12 cm depth perpendicular to the surface. On comparing the analysis with untreated and lime-treated core-sampled specimens, carbonation is found to have occurred on specimens sampled up to 4.2 cm depth perpendicular to the surface. The decrease in soil pH to a value 9 or lower than that and the presence of carbonates confirmed the carbonation effect. At the pore-structure level, carbonation mechanism is found to increase macropores of diameter 20000–100000 Å, which is missing in the non-carbonated specimens and even greater than the one found at untreated soil. Such an observation confirmed the loss of cementitious compounds due to carbonation, thus, converting the mesopores developed due to lime treatment to macropores of larger pore diameter.

KW - Atmospherically exposed

KW - Calcium carbonates

KW - Carbonation

KW - Lime-treated soil

KW - Macropores

KW - Soil pH

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U2 - 10.1016/j.cscm.2022.e01222

DO - 10.1016/j.cscm.2022.e01222

M3 - Article

AN - SCOPUS:85131678404

VL - 17

JO - Case Studies in Construction Materials

JF - Case Studies in Construction Materials

SN - 2214-5095

M1 - e01222

ER -

Carbonation investigation on atmospherically exposed lime-treated silty soil

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