Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Monitoring temperature and hydration by mortar sensors made of nanomodified Portland cement
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0000-0003-0459-7433
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0000-0001-5136-9412
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0000-0001-7279-6528
The Institute of Engineering Materials and Biomaterials, Silesian University of Technology, 44-100, Gliwice, Poland.
Show others and affiliations
2024 (English)In: Materials and Structures, ISSN 1359-5997, E-ISSN 1871-6873, Vol. 57, article id 1Article in journal (Refereed) Published
Abstract [en]

Mortar beams incorporating carbon nanofibers (CNFs), which were synthesized in situ on Portland cement particles, were used to produce nanomodified Portland cement sensors (SmartCem sensors). SmartCem sensors exhibited an electrical response comparable to a thermistor with a temperature coefficient of resistivity of − 0.0152/ °C. The highest temperature sensing was obtained for the SmartCem sensor, which contained ~ 0.271 wt.% of CNFs. The calculated temperature sensitivity was approximately 11.76% higher in comparison with the mortar beam containing only unmodified Portland cement. SmartCem sensors were used to monitor the cement hydration in large-scale self-compacting concrete beams. The measurements were conducted after casting for 7 days. Additionally, commercially available thermocouple and humidity sensors were used as references. The results showed that changes in electrical resistivity measured by the SmartCem sensor were well aligned with the ongoing hydration processes.

Place, publisher, year, edition, pages
Springer Nature, 2024. Vol. 57, article id 1
Keywords [en]
Nanomodified Portland cement, Carbon nanofibers, CNFs, Temperature sensing, Temperature sensitivity, Temperature sensor, Hydration temperature, Hydration monitoring, Cement-based sensor
National Category
Building Technologies Composite Science and Engineering
Research subject
Building Materials
Identifiers
URN: urn:nbn:se:ltu:diva-97278DOI: 10.1617/s11527-023-02275-wOAI: oai:DiVA.org:ltu-97278DiVA, id: diva2:1758619
Funder
VinnovaSwedish Transport AdministrationSvenska Byggbranschens Utvecklingsfond (SBUF)
Note

Validerad;2023;Nivå 2;2023-12-04 (joosat);

Full text license: CC BY

This article has previously appeared as a manuscript in a thesis.

Available from: 2023-05-23 Created: 2023-05-23 Last updated: 2023-12-04Bibliographically approved
In thesis
1. Sensing capability of nanomodified Portland cement composites
Open this publication in new window or tab >>Sensing capability of nanomodified Portland cement composites
2023 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Sensing cement-based composites refer to composites that have sensing functionality that can measure several physical and chemical parameters. Sensing cement-based composites are fabricated by incorporating some functional fillers, such as conductive fibers (CFs), carbon nanofibers (CNFs), carbon nanotubes (CNTs), and graphene, into conventional concrete. The self-sensing phenomenon in a material is based on the property of an electrically conductive material to show a change in its electrical resistivity. Several factors affect the electrical resistivity of cement-based composites. These include, for example, the type of added conductive phases, their concentration, the microstructure of the surrounding binder matrix, and its composition or moisture content. Variable stress, strains, relative humidity, temperature, or crack development can all affect conductivity.

A novel material, so-called "nanomodified Portland cement," is an in situ synthesis of carbon-based materials on untreated Portland cement particles. The synthesized method is based on the application of a chemical vapor deposition process (CVD). The nanomodified Portland cement was produced and used as a conductive filler in a sensing cement-based composite to improve the dispersion issue of the carbon-based materials, which have a hydrophobic nature and the tendency to agglomerate in the cement-based composites.

The sensing capability of the nanomodified Portland cement composites was studied and compared with other conductive materials, revealing the percolation threshold and tunneling phenomena as possible explanations for the sensing mechanism with and without mechanical deformation.

The achieved results of this study suggest that nanomodified Portland cement is a promising material for use in sensing cement-based composites as it exhibits high sensitivity to compressive stress and strain, humidity, and temperature. Furthermore, it has the potential to be utilized in the development of integrated monitoring systems for concrete structures.

Place, publisher, year, edition, pages
Luleå: Luleå University of Technology, 2023
Series
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544
Keywords
Sensing cementitious composites, nanomodified Portland cement, Carbon nanofibers, CNF, piezoresistive materials, sensor, cement-based sensor, self-monitoring, sensing capability
National Category
Building Technologies Composite Science and Engineering
Research subject
Building Materials
Identifiers
urn:nbn:se:ltu:diva-97288 (URN)978-91-8048-337-7 (ISBN)978-91-8048-338-4 (ISBN)
Public defence
2023-10-11, F 1031, Luleå tekniska universitet, Luleå, 10:00 (English)
Opponent
Supervisors
Funder
VinnovaSwedish Transport AdministrationSvenska Byggbranschens Utvecklingsfond (SBUF)
Available from: 2023-05-23 Created: 2023-05-23 Last updated: 2023-09-22Bibliographically approved

Open Access in DiVA

fulltext(1561 kB)84 downloads
File information
File name FULLTEXT01.pdfFile size 1561 kBChecksum SHA-512
01bb7e5ba7baa3c65c89bcbdcf7827353d05a801f4ec91a36048a8f493fde84cf9ed13e4942c221307ac8baac2e394585d53c91df8a2c348254469a3c9c2baa4
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Authority records

Buasiri, ThanyaratKothari, AnkitHabermehl-Cwirzen, KarinCwirzen, Andrzej

Search in DiVA

By author/editor
Buasiri, ThanyaratKothari, AnkitHabermehl-Cwirzen, KarinCwirzen, Andrzej
By organisation
Structural and Fire Engineering
In the same journal
Materials and Structures
Building TechnologiesComposite Science and Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 86 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 234 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf