Thermomechanical properties of a new small-scale reinforced concrete thermo-active pile for centrifuge testing

Andrew Minto*, A. K. Leung, D. Vitali, J. A. Knappett

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The use of thermo-active geo-structures has been recognised to be a suitable engineering solution that can reduce carbon emissions from civil infrastructure. Physical modelling in a geotechnical centrifuge has been increasingly used to study the beahviour of this kind of geo-structures and their interaction with the surrounding soil under cyclic heating/cooling loads. Previous studies have been limited by the choice of materials used to model thermo-active geo-structures (such as aluminium and conventional concrete), due to inaccurate scaling of the thermal properties and the inability to capture the quasi-brittleness and strength properties of reinforced concrete (RC) due to improper scaling of aggregate sizes. This paper aims to develop a new thermally-enhanced plaster-based model concrete which can realistically reproduce both the thermal and mechanical properties that are representative of concrete at prototype scale. The new model concrete, combined with steel wire reinforcement (i.e. geometrically scaled reinforcing bars and stirrups), was then used to create 1:20 scaled RC thermo-active piles. Effects of temperature on their thermomechanical behaviour, including the coefficient of thermal expansion, moment capacity and flexural stiffness, were investigated. The suitability of using the newly-developed RC thermo-active piles for future centrifuge testing is discussed.
Original languageEnglish
Title of host publicationEnergy Geotechnics
Subtitle of host publicationproceedings of the 1st International conference on energy geotechnics, ICEGT 2016, Kiel, Germany, 29-31 August 2016
EditorsFrank Wuttke, Sebastian Bauer, Marcelo Sanchez
Place of PublicationLeiden
PublisherCRC Press
Pages37-44
Number of pages8
ISBN (Electronic)9781315315249
ISBN (Print)9781138032996
DOIs
Publication statusPublished - 8 Aug 2016
Externally publishedYes
Event1st International Conference on Energy Geotechnics - Auditorium Maximum (Audimax) of Kiel University, Kiel, Germany
Duration: 29 Aug 201631 Aug 2016
Conference number: 1st
https://web.archive.org/web/20161019023418/http://www.iceg-2016.de/home.html

Conference

Conference1st International Conference on Energy Geotechnics
Abbreviated titleICEGT 2016
CountryGermany
CityKiel
Period29/08/1631/08/16
Internet address

Fingerprint

Centrifuges
Piles
Reinforced concrete
Concretes
Testing
Thermodynamic properties
Plaster
Brittleness
Thermal expansion
Reinforcement
Stiffness
Wire
Cooling
Aluminum
Soils
Heating
Mechanical properties
Carbon
Steel
Temperature

Cite this

Minto, A., Leung, A. K., Vitali, D., & Knappett, J. A. (2016). Thermomechanical properties of a new small-scale reinforced concrete thermo-active pile for centrifuge testing. In F. Wuttke, S. Bauer, & M. Sanchez (Eds.), Energy Geotechnics: proceedings of the 1st International conference on energy geotechnics, ICEGT 2016, Kiel, Germany, 29-31 August 2016 (pp. 37-44). Leiden: CRC Press. https://doi.org/10.1201/b21938
Minto, Andrew ; Leung, A. K. ; Vitali, D. ; Knappett, J. A. / Thermomechanical properties of a new small-scale reinforced concrete thermo-active pile for centrifuge testing. Energy Geotechnics: proceedings of the 1st International conference on energy geotechnics, ICEGT 2016, Kiel, Germany, 29-31 August 2016. editor / Frank Wuttke ; Sebastian Bauer ; Marcelo Sanchez. Leiden : CRC Press, 2016. pp. 37-44
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abstract = "The use of thermo-active geo-structures has been recognised to be a suitable engineering solution that can reduce carbon emissions from civil infrastructure. Physical modelling in a geotechnical centrifuge has been increasingly used to study the beahviour of this kind of geo-structures and their interaction with the surrounding soil under cyclic heating/cooling loads. Previous studies have been limited by the choice of materials used to model thermo-active geo-structures (such as aluminium and conventional concrete), due to inaccurate scaling of the thermal properties and the inability to capture the quasi-brittleness and strength properties of reinforced concrete (RC) due to improper scaling of aggregate sizes. This paper aims to develop a new thermally-enhanced plaster-based model concrete which can realistically reproduce both the thermal and mechanical properties that are representative of concrete at prototype scale. The new model concrete, combined with steel wire reinforcement (i.e. geometrically scaled reinforcing bars and stirrups), was then used to create 1:20 scaled RC thermo-active piles. Effects of temperature on their thermomechanical behaviour, including the coefficient of thermal expansion, moment capacity and flexural stiffness, were investigated. The suitability of using the newly-developed RC thermo-active piles for future centrifuge testing is discussed.",
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Minto, A, Leung, AK, Vitali, D & Knappett, JA 2016, Thermomechanical properties of a new small-scale reinforced concrete thermo-active pile for centrifuge testing. in F Wuttke, S Bauer & M Sanchez (eds), Energy Geotechnics: proceedings of the 1st International conference on energy geotechnics, ICEGT 2016, Kiel, Germany, 29-31 August 2016. CRC Press, Leiden, pp. 37-44, 1st International Conference on Energy Geotechnics, Kiel, Germany, 29/08/16. https://doi.org/10.1201/b21938

Thermomechanical properties of a new small-scale reinforced concrete thermo-active pile for centrifuge testing. / Minto, Andrew; Leung, A. K.; Vitali, D.; Knappett, J. A.

Energy Geotechnics: proceedings of the 1st International conference on energy geotechnics, ICEGT 2016, Kiel, Germany, 29-31 August 2016. ed. / Frank Wuttke; Sebastian Bauer; Marcelo Sanchez. Leiden : CRC Press, 2016. p. 37-44.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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T1 - Thermomechanical properties of a new small-scale reinforced concrete thermo-active pile for centrifuge testing

AU - Minto, Andrew

AU - Leung, A. K.

AU - Vitali, D.

AU - Knappett, J. A.

PY - 2016/8/8

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N2 - The use of thermo-active geo-structures has been recognised to be a suitable engineering solution that can reduce carbon emissions from civil infrastructure. Physical modelling in a geotechnical centrifuge has been increasingly used to study the beahviour of this kind of geo-structures and their interaction with the surrounding soil under cyclic heating/cooling loads. Previous studies have been limited by the choice of materials used to model thermo-active geo-structures (such as aluminium and conventional concrete), due to inaccurate scaling of the thermal properties and the inability to capture the quasi-brittleness and strength properties of reinforced concrete (RC) due to improper scaling of aggregate sizes. This paper aims to develop a new thermally-enhanced plaster-based model concrete which can realistically reproduce both the thermal and mechanical properties that are representative of concrete at prototype scale. The new model concrete, combined with steel wire reinforcement (i.e. geometrically scaled reinforcing bars and stirrups), was then used to create 1:20 scaled RC thermo-active piles. Effects of temperature on their thermomechanical behaviour, including the coefficient of thermal expansion, moment capacity and flexural stiffness, were investigated. The suitability of using the newly-developed RC thermo-active piles for future centrifuge testing is discussed.

AB - The use of thermo-active geo-structures has been recognised to be a suitable engineering solution that can reduce carbon emissions from civil infrastructure. Physical modelling in a geotechnical centrifuge has been increasingly used to study the beahviour of this kind of geo-structures and their interaction with the surrounding soil under cyclic heating/cooling loads. Previous studies have been limited by the choice of materials used to model thermo-active geo-structures (such as aluminium and conventional concrete), due to inaccurate scaling of the thermal properties and the inability to capture the quasi-brittleness and strength properties of reinforced concrete (RC) due to improper scaling of aggregate sizes. This paper aims to develop a new thermally-enhanced plaster-based model concrete which can realistically reproduce both the thermal and mechanical properties that are representative of concrete at prototype scale. The new model concrete, combined with steel wire reinforcement (i.e. geometrically scaled reinforcing bars and stirrups), was then used to create 1:20 scaled RC thermo-active piles. Effects of temperature on their thermomechanical behaviour, including the coefficient of thermal expansion, moment capacity and flexural stiffness, were investigated. The suitability of using the newly-developed RC thermo-active piles for future centrifuge testing is discussed.

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DO - 10.1201/b21938

M3 - Conference contribution

SN - 9781138032996

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BT - Energy Geotechnics

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A2 - Bauer, Sebastian

A2 - Sanchez, Marcelo

PB - CRC Press

CY - Leiden

ER -

Minto A, Leung AK, Vitali D, Knappett JA. Thermomechanical properties of a new small-scale reinforced concrete thermo-active pile for centrifuge testing. In Wuttke F, Bauer S, Sanchez M, editors, Energy Geotechnics: proceedings of the 1st International conference on energy geotechnics, ICEGT 2016, Kiel, Germany, 29-31 August 2016. Leiden: CRC Press. 2016. p. 37-44 https://doi.org/10.1201/b21938