A new model concrete for reduced-scale model tests of energy geo-structures

Davide Vitali, Anthony K. Leung*, Andrew Minto, Jonathan A. Knappett

*Corresponding author for this work

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

Abstract

Concrete energy geo-structures such as piles and diaphragm walls exhibit complex thermomechanical behaviour and interaction with the surrounding soil. Small-scale physical model tests including the use of geotechnical centrifuges have been utilised to study such soil-structure interaction. However, existing materials used to model concrete energy geo-structures do not simultaneously scale both the mechanical and thermal properties. This study attempts to develop a new material that could have representative thermal and mechanical behaviour of concrete. The new material is a plaster-based mortar with the addition of fine copper powder. It is revealed that adding copper powder from 0 to 6% (by volume) to the mortar resulted in a 90% increase in thermal conductivity. More importantly, such an addition was not found to cause significant increase or reduction of the mechanical strength, including both the unconfined compressive strength and modulus of rupture. These findings suggest that while the thermal properties of concrete can be properly scaled, the new type of mortar can maintain its ability to also correctly scale the mechanical behaviour of concrete simultaneously. This will allow the study of a range of geotechnical problems, where thermal properties and structural strength are important, such as slope reinforcement using concrete energy piles.
Original languageEnglish
Title of host publicationGeo-Chicago 2016
Subtitle of host publicationgeotechnics for sustainable energy: selected papers from sessions of Geo-Chicago 2016
EditorsArvin Farid, Anirban De, Krishna R. Reddy, Nazli Yesiller, Dimitrios Zekkos
Place of PublicationReston
PublisherAmerican Society of Civil Engineers (ASCE)
Chapter19
Pages185-194
Number of pages10
ISBN (Electronic)9780784480137 (PDF)
DOIs
Publication statusPublished - 11 Aug 2016
Externally publishedYes
EventGeo Sustainability & GeoEnvironment Conference 2016: Sustainability, Energy, and the Geoenvironment - Sheraton Chicago Hotel & Towers, Chicago, United States
Duration: 14 Aug 201618 Aug 2016

Publication series

NameGeotechnical special publication
PublisherAmerican Society of Civil Engineers (ASCE)
Number270

Conference

ConferenceGeo Sustainability & GeoEnvironment Conference 2016
Abbreviated titleGEO Chicago 2016
CountryUnited States
CityChicago
Period14/08/1618/08/16
OtherThe theme of Geo-Chicago 2016 is Sustainability, Energy, and the Geoenvironment and it will feature the latest research advances and engineering practice innovations with a focus on characterization, modeling, design, construction, and field performance. The conference will include a wide range of knowledge-enhancing technical sessions, short courses, workshops, and technical tours. Around 600 U.S. and international participants from academia, industry, and government agencies are expected to attend the conference.

Fingerprint

Concretes
Mortar
Copper powder
Thermodynamic properties
Piles
Concrete reinforcements
Plaster
Soil structure interactions
Centrifuges
Diaphragms
Compressive strength
Strength of materials
Thermal conductivity
Soils
Mechanical properties

Cite this

Vitali, D., Leung, A. K., Minto, A., & Knappett, J. A. (2016). A new model concrete for reduced-scale model tests of energy geo-structures. In A. Farid, A. De, K. R. Reddy, N. Yesiller, & D. Zekkos (Eds.), Geo-Chicago 2016: geotechnics for sustainable energy: selected papers from sessions of Geo-Chicago 2016 (pp. 185-194). (Geotechnical special publication; No. 270). Reston: American Society of Civil Engineers (ASCE). https://doi.org/10.1061/9780784480137.019
Vitali, Davide ; Leung, Anthony K. ; Minto, Andrew ; Knappett, Jonathan A. / A new model concrete for reduced-scale model tests of energy geo-structures. Geo-Chicago 2016: geotechnics for sustainable energy: selected papers from sessions of Geo-Chicago 2016. editor / Arvin Farid ; Anirban De ; Krishna R. Reddy ; Nazli Yesiller ; Dimitrios Zekkos. Reston : American Society of Civil Engineers (ASCE), 2016. pp. 185-194 (Geotechnical special publication; 270).
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title = "A new model concrete for reduced-scale model tests of energy geo-structures",
abstract = "Concrete energy geo-structures such as piles and diaphragm walls exhibit complex thermomechanical behaviour and interaction with the surrounding soil. Small-scale physical model tests including the use of geotechnical centrifuges have been utilised to study such soil-structure interaction. However, existing materials used to model concrete energy geo-structures do not simultaneously scale both the mechanical and thermal properties. This study attempts to develop a new material that could have representative thermal and mechanical behaviour of concrete. The new material is a plaster-based mortar with the addition of fine copper powder. It is revealed that adding copper powder from 0 to 6{\%} (by volume) to the mortar resulted in a 90{\%} increase in thermal conductivity. More importantly, such an addition was not found to cause significant increase or reduction of the mechanical strength, including both the unconfined compressive strength and modulus of rupture. These findings suggest that while the thermal properties of concrete can be properly scaled, the new type of mortar can maintain its ability to also correctly scale the mechanical behaviour of concrete simultaneously. This will allow the study of a range of geotechnical problems, where thermal properties and structural strength are important, such as slope reinforcement using concrete energy piles.",
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Vitali, D, Leung, AK, Minto, A & Knappett, JA 2016, A new model concrete for reduced-scale model tests of energy geo-structures. in A Farid, A De, KR Reddy, N Yesiller & D Zekkos (eds), Geo-Chicago 2016: geotechnics for sustainable energy: selected papers from sessions of Geo-Chicago 2016. Geotechnical special publication, no. 270, American Society of Civil Engineers (ASCE), Reston, pp. 185-194, Geo Sustainability & GeoEnvironment Conference 2016, Chicago, United States, 14/08/16. https://doi.org/10.1061/9780784480137.019

A new model concrete for reduced-scale model tests of energy geo-structures. / Vitali, Davide; Leung, Anthony K.; Minto, Andrew; Knappett, Jonathan A.

Geo-Chicago 2016: geotechnics for sustainable energy: selected papers from sessions of Geo-Chicago 2016. ed. / Arvin Farid; Anirban De; Krishna R. Reddy; Nazli Yesiller; Dimitrios Zekkos. Reston : American Society of Civil Engineers (ASCE), 2016. p. 185-194 (Geotechnical special publication; No. 270).

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

TY - GEN

T1 - A new model concrete for reduced-scale model tests of energy geo-structures

AU - Vitali, Davide

AU - Leung, Anthony K.

AU - Minto, Andrew

AU - Knappett, Jonathan A.

PY - 2016/8/11

Y1 - 2016/8/11

N2 - Concrete energy geo-structures such as piles and diaphragm walls exhibit complex thermomechanical behaviour and interaction with the surrounding soil. Small-scale physical model tests including the use of geotechnical centrifuges have been utilised to study such soil-structure interaction. However, existing materials used to model concrete energy geo-structures do not simultaneously scale both the mechanical and thermal properties. This study attempts to develop a new material that could have representative thermal and mechanical behaviour of concrete. The new material is a plaster-based mortar with the addition of fine copper powder. It is revealed that adding copper powder from 0 to 6% (by volume) to the mortar resulted in a 90% increase in thermal conductivity. More importantly, such an addition was not found to cause significant increase or reduction of the mechanical strength, including both the unconfined compressive strength and modulus of rupture. These findings suggest that while the thermal properties of concrete can be properly scaled, the new type of mortar can maintain its ability to also correctly scale the mechanical behaviour of concrete simultaneously. This will allow the study of a range of geotechnical problems, where thermal properties and structural strength are important, such as slope reinforcement using concrete energy piles.

AB - Concrete energy geo-structures such as piles and diaphragm walls exhibit complex thermomechanical behaviour and interaction with the surrounding soil. Small-scale physical model tests including the use of geotechnical centrifuges have been utilised to study such soil-structure interaction. However, existing materials used to model concrete energy geo-structures do not simultaneously scale both the mechanical and thermal properties. This study attempts to develop a new material that could have representative thermal and mechanical behaviour of concrete. The new material is a plaster-based mortar with the addition of fine copper powder. It is revealed that adding copper powder from 0 to 6% (by volume) to the mortar resulted in a 90% increase in thermal conductivity. More importantly, such an addition was not found to cause significant increase or reduction of the mechanical strength, including both the unconfined compressive strength and modulus of rupture. These findings suggest that while the thermal properties of concrete can be properly scaled, the new type of mortar can maintain its ability to also correctly scale the mechanical behaviour of concrete simultaneously. This will allow the study of a range of geotechnical problems, where thermal properties and structural strength are important, such as slope reinforcement using concrete energy piles.

U2 - 10.1061/9780784480137.019

DO - 10.1061/9780784480137.019

M3 - Conference contribution

T3 - Geotechnical special publication

SP - 185

EP - 194

BT - Geo-Chicago 2016

A2 - Farid, Arvin

A2 - De, Anirban

A2 - Reddy, Krishna R.

A2 - Yesiller, Nazli

A2 - Zekkos, Dimitrios

PB - American Society of Civil Engineers (ASCE)

CY - Reston

ER -

Vitali D, Leung AK, Minto A, Knappett JA. A new model concrete for reduced-scale model tests of energy geo-structures. In Farid A, De A, Reddy KR, Yesiller N, Zekkos D, editors, Geo-Chicago 2016: geotechnics for sustainable energy: selected papers from sessions of Geo-Chicago 2016. Reston: American Society of Civil Engineers (ASCE). 2016. p. 185-194. (Geotechnical special publication; 270). https://doi.org/10.1061/9780784480137.019