Monitoring of concrete segregation using AC impedance spectroscopy

Teemu Ojala; Hassan Ahmed; Petri Kuusela; Aku Seppänen; Jouni Punkki

doi:10.1016/j.conbuildmat.2023.131453

Monitoring of concrete segregation using AC impedance spectroscopy

Teemu Ojala^*, Hassan Ahmed, Petri Kuusela, Aku Seppänen, Jouni Punkki

^*Tämän työn vastaava kirjoittaja

University of Eastern Finland

Tutkimustuotos: Lehtiartikkeli › Article › Scientific › vertaisarvioitu

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24 Lataukset (Pure)

Abstrakti

Segregation is one of the major phenomena decreasing the durability of concrete and increasing its risk of failure. This paper investigates the feasibility of AC Impedance Spectroscopy (ACIS) to serve as a monitoring technique for the concrete segregation during compaction. The impedances of fresh concrete were determined between compaction intervals. Changes in the calculated bulk resistivities were compared to hardened densities of the drilled cores, as well as to aggregate segregation obtained via digital image analysis of the hardened concrete sections. During the compaction process, a significant difference in the bulk resistivity was observed between the top and bottom parts of segregated specimens in comparison to unsegregated specimens. By inspecting the relationship between the measurement methods, it was found that ACIS provides a reliable approach (r=-0.948) for estimating the segregation level in cases where the resistivity is mostly affected by the movement of aggregates.

Alkuperäiskieli	Englanti
Artikkeli	131453
Sivumäärä	11
Julkaisu	Construction and Building Materials
Vuosikerta	384
DOI - pysyväislinkit	https://doi.org/10.1016/j.conbuildmat.2023.131453
Tila	Julkaistu - 27 kesäk. 2023
OKM-julkaisutyyppi	A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

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10.1016/j.conbuildmat.2023.131453Lisenssi: CC BY

1-s2.0-S0950061823011662-mainFinal published version, 6,22 MBLisenssi: CC BY

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Studies Conducted at Aalto University on Building and Construction Recently Reported (Monitoring of Concrete Segregation Using Ac Impedance Spectroscopy)
Jouni Punkki
05/07/2023
1 kohde/ Medianäkyvyys
Lehdistö/media: Esiintyminen mediassa

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@article{cc688b61668541e49927904c3f8c4852,

title = "Monitoring of concrete segregation using AC impedance spectroscopy",

abstract = "Segregation is one of the major phenomena decreasing the durability of concrete and increasing its risk of failure. This paper investigates the feasibility of AC Impedance Spectroscopy (ACIS) to serve as a monitoring technique for the concrete segregation during compaction. The impedances of fresh concrete were determined between compaction intervals. Changes in the calculated bulk resistivities were compared to hardened densities of the drilled cores, as well as to aggregate segregation obtained via digital image analysis of the hardened concrete sections. During the compaction process, a significant difference in the bulk resistivity was observed between the top and bottom parts of segregated specimens in comparison to unsegregated specimens. By inspecting the relationship between the measurement methods, it was found that ACIS provides a reliable approach (r=-0.948) for estimating the segregation level in cases where the resistivity is mostly affected by the movement of aggregates.",

keywords = "Concrete compaction, Impedance spectroscopy, Segregation, Vibration time",

author = "Teemu Ojala and Hassan Ahmed and Petri Kuusela and Aku Sepp{\"a}nen and Jouni Punkki",

note = "Funding Information: This study was financially supported by Co-operation agreement with the Finnish concrete industry (project number 700721) and the Academy of Finland (Finnish Centre of Excellence in Inverse Modelling and Imaging, project number 336795). Publisher Copyright: {\textcopyright} 2023 The Authors",

year = "2023",

month = jun,

day = "27",

doi = "10.1016/j.conbuildmat.2023.131453",

language = "English",

volume = "384",

journal = "Construction and Building Materials",

issn = "0950-0618",

publisher = "Elsevier Science Ltd.",

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TY - JOUR

T1 - Monitoring of concrete segregation using AC impedance spectroscopy

AU - Ojala, Teemu

AU - Ahmed, Hassan

AU - Kuusela, Petri

AU - Seppänen, Aku

AU - Punkki, Jouni

N1 - Funding Information: This study was financially supported by Co-operation agreement with the Finnish concrete industry (project number 700721) and the Academy of Finland (Finnish Centre of Excellence in Inverse Modelling and Imaging, project number 336795). Publisher Copyright: © 2023 The Authors

PY - 2023/6/27

Y1 - 2023/6/27

N2 - Segregation is one of the major phenomena decreasing the durability of concrete and increasing its risk of failure. This paper investigates the feasibility of AC Impedance Spectroscopy (ACIS) to serve as a monitoring technique for the concrete segregation during compaction. The impedances of fresh concrete were determined between compaction intervals. Changes in the calculated bulk resistivities were compared to hardened densities of the drilled cores, as well as to aggregate segregation obtained via digital image analysis of the hardened concrete sections. During the compaction process, a significant difference in the bulk resistivity was observed between the top and bottom parts of segregated specimens in comparison to unsegregated specimens. By inspecting the relationship between the measurement methods, it was found that ACIS provides a reliable approach (r=-0.948) for estimating the segregation level in cases where the resistivity is mostly affected by the movement of aggregates.

AB - Segregation is one of the major phenomena decreasing the durability of concrete and increasing its risk of failure. This paper investigates the feasibility of AC Impedance Spectroscopy (ACIS) to serve as a monitoring technique for the concrete segregation during compaction. The impedances of fresh concrete were determined between compaction intervals. Changes in the calculated bulk resistivities were compared to hardened densities of the drilled cores, as well as to aggregate segregation obtained via digital image analysis of the hardened concrete sections. During the compaction process, a significant difference in the bulk resistivity was observed between the top and bottom parts of segregated specimens in comparison to unsegregated specimens. By inspecting the relationship between the measurement methods, it was found that ACIS provides a reliable approach (r=-0.948) for estimating the segregation level in cases where the resistivity is mostly affected by the movement of aggregates.

KW - Concrete compaction

KW - Impedance spectroscopy

KW - Segregation

KW - Vibration time

UR - http://www.scopus.com/inward/record.url?scp=85152902593&partnerID=8YFLogxK

U2 - 10.1016/j.conbuildmat.2023.131453

DO - 10.1016/j.conbuildmat.2023.131453

M3 - Article

AN - SCOPUS:85152902593

SN - 0950-0618

VL - 384

JO - Construction and Building Materials

JF - Construction and Building Materials

M1 - 131453

ER -

Monitoring of concrete segregation using AC impedance spectroscopy

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Studies Conducted at Aalto University on Building and Construction Recently Reported (Monitoring of Concrete Segregation Using Ac Impedance Spectroscopy)

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