Changes in geotechnical properties of urban soils during carbonation

Ehsan M. Jorat; Ben W. Kolosz; Saran P. Sohi; Elisa Lopez-Capel; David A. C. Manning

doi:10.3233/978-1-61499-603-3-912

Changes in geotechnical properties of urban soils during carbonation

Ehsan M. Jorat, Ben W. Kolosz, Saran P. Sohi, Elisa Lopez-Capel, David A. C. Manning

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Urban soils that contain materials derived from demolition undergo carbonation as a consequence of a reaction between Ca derived from cement and concrete, and carbonate ultimately derived from the atmosphere. Estimated rates of CaCO₃ accumulation are equivalent to the removal of 150T CO₂ ha^-1 yr^-1. Although this process has benefits for carbon capture, the formation of CaCO₃ within the soil potentially affects the geotechnical properties. Trial pits at a number of locations have consistently yielded CaCO₃ contents of 20 wt% from 0-1m depth. Carbonate has formed in intergranular space within the soil, possibly with improvements in strength but also with changes in permeability that may affect through drainage. This paper investigates the limits to CaCO₃ formation imposed by soil porosity for a number of artificial soils: 'well sorted sand or gravel', 'sand and grave, mixed', 'silt' and 'clay'. Calculated values for CaCO₃ for the various soil types are used to determine limits to CaCO₃ formation within the first 1 m of sediments at the Science Central Site in Newcastle upon Tyne, UK, using information derived from five trial pits within made ground.

Original language	English
Title of host publication	From fundamentals to applications in geotechnics
Subtitle of host publication	proceedings of the 15th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, 15-18 November 2015, Buenos Aires, Argentina
Editors	Diego Manzanal, Alejo O. Sfriso
Place of Publication	Amsterdam
Publisher	IOS Press
Pages	912-918
Number of pages	7
ISBN (Electronic)	9781614996033
ISBN (Print)	9781614996026
DOIs	https://doi.org/10.3233/978-1-61499-603-3-912
Publication status	Published - 11 Dec 2015
Externally published	Yes

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Jorat, E. M., Kolosz, B. W., Sohi, S. P., Lopez-Capel, E., & Manning, D. A. C. (2015). Changes in geotechnical properties of urban soils during carbonation. In D. Manzanal, & A. O. Sfriso (Eds.), From fundamentals to applications in geotechnics: proceedings of the 15th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, 15-18 November 2015, Buenos Aires, Argentina (pp. 912-918). IOS Press. https://doi.org/10.3233/978-1-61499-603-3-912

Jorat, Ehsan M. ; Kolosz, Ben W. ; Sohi, Saran P. ; Lopez-Capel, Elisa ; Manning, David A. C. / Changes in geotechnical properties of urban soils during carbonation. From fundamentals to applications in geotechnics: proceedings of the 15th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, 15-18 November 2015, Buenos Aires, Argentina. editor / Diego Manzanal ; Alejo O. Sfriso. Amsterdam : IOS Press, 2015. pp. 912-918

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title = "Changes in geotechnical properties of urban soils during carbonation",

abstract = "Urban soils that contain materials derived from demolition undergo carbonation as a consequence of a reaction between Ca derived from cement and concrete, and carbonate ultimately derived from the atmosphere. Estimated rates of CaCO3 accumulation are equivalent to the removal of 150T CO2 ha-1 yr-1. Although this process has benefits for carbon capture, the formation of CaCO3 within the soil potentially affects the geotechnical properties. Trial pits at a number of locations have consistently yielded CaCO3 contents of 20 wt% from 0-1m depth. Carbonate has formed in intergranular space within the soil, possibly with improvements in strength but also with changes in permeability that may affect through drainage. This paper investigates the limits to CaCO3 formation imposed by soil porosity for a number of artificial soils: 'well sorted sand or gravel', 'sand and grave, mixed', 'silt' and 'clay'. Calculated values for CaCO3 for the various soil types are used to determine limits to CaCO3 formation within the first 1 m of sediments at the Science Central Site in Newcastle upon Tyne, UK, using information derived from five trial pits within made ground.",

author = "Jorat, {Ehsan M.} and Kolosz, {Ben W.} and Sohi, {Saran P.} and Elisa Lopez-Capel and Manning, {David A. C.}",

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doi = "10.3233/978-1-61499-603-3-912",

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Jorat, EM, Kolosz, BW, Sohi, SP, Lopez-Capel, E & Manning, DAC 2015, Changes in geotechnical properties of urban soils during carbonation. in D Manzanal & AO Sfriso (eds), From fundamentals to applications in geotechnics: proceedings of the 15th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, 15-18 November 2015, Buenos Aires, Argentina. IOS Press, Amsterdam, pp. 912-918. https://doi.org/10.3233/978-1-61499-603-3-912

Changes in geotechnical properties of urban soils during carbonation. / Jorat, Ehsan M.; Kolosz, Ben W.; Sohi, Saran P.; Lopez-Capel, Elisa; Manning, David A. C.

From fundamentals to applications in geotechnics: proceedings of the 15th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, 15-18 November 2015, Buenos Aires, Argentina. ed. / Diego Manzanal; Alejo O. Sfriso. Amsterdam : IOS Press, 2015. p. 912-918.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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T1 - Changes in geotechnical properties of urban soils during carbonation

AU - Jorat, Ehsan M.

AU - Kolosz, Ben W.

AU - Sohi, Saran P.

AU - Lopez-Capel, Elisa

AU - Manning, David A. C.

PY - 2015/12/11

Y1 - 2015/12/11

N2 - Urban soils that contain materials derived from demolition undergo carbonation as a consequence of a reaction between Ca derived from cement and concrete, and carbonate ultimately derived from the atmosphere. Estimated rates of CaCO3 accumulation are equivalent to the removal of 150T CO2 ha-1 yr-1. Although this process has benefits for carbon capture, the formation of CaCO3 within the soil potentially affects the geotechnical properties. Trial pits at a number of locations have consistently yielded CaCO3 contents of 20 wt% from 0-1m depth. Carbonate has formed in intergranular space within the soil, possibly with improvements in strength but also with changes in permeability that may affect through drainage. This paper investigates the limits to CaCO3 formation imposed by soil porosity for a number of artificial soils: 'well sorted sand or gravel', 'sand and grave, mixed', 'silt' and 'clay'. Calculated values for CaCO3 for the various soil types are used to determine limits to CaCO3 formation within the first 1 m of sediments at the Science Central Site in Newcastle upon Tyne, UK, using information derived from five trial pits within made ground.

AB - Urban soils that contain materials derived from demolition undergo carbonation as a consequence of a reaction between Ca derived from cement and concrete, and carbonate ultimately derived from the atmosphere. Estimated rates of CaCO3 accumulation are equivalent to the removal of 150T CO2 ha-1 yr-1. Although this process has benefits for carbon capture, the formation of CaCO3 within the soil potentially affects the geotechnical properties. Trial pits at a number of locations have consistently yielded CaCO3 contents of 20 wt% from 0-1m depth. Carbonate has formed in intergranular space within the soil, possibly with improvements in strength but also with changes in permeability that may affect through drainage. This paper investigates the limits to CaCO3 formation imposed by soil porosity for a number of artificial soils: 'well sorted sand or gravel', 'sand and grave, mixed', 'silt' and 'clay'. Calculated values for CaCO3 for the various soil types are used to determine limits to CaCO3 formation within the first 1 m of sediments at the Science Central Site in Newcastle upon Tyne, UK, using information derived from five trial pits within made ground.

U2 - 10.3233/978-1-61499-603-3-912

DO - 10.3233/978-1-61499-603-3-912

M3 - Conference contribution

SN - 9781614996026

SP - 912

EP - 918

BT - From fundamentals to applications in geotechnics

A2 - Manzanal, Diego

A2 - Sfriso, Alejo O.

PB - IOS Press

CY - Amsterdam

ER -

Jorat EM, Kolosz BW, Sohi SP, Lopez-Capel E, Manning DAC. Changes in geotechnical properties of urban soils during carbonation. In Manzanal D, Sfriso AO, editors, From fundamentals to applications in geotechnics: proceedings of the 15th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, 15-18 November 2015, Buenos Aires, Argentina. Amsterdam: IOS Press. 2015. p. 912-918 https://doi.org/10.3233/978-1-61499-603-3-912