Skip to main content

2025 | OriginalPaper | Buchkapitel

Early-Age Properties of Cement Pastes Incorporating Aqueous Dispersions of Carbon Nanofibers

verfasst von : Ali Teymouri, Alireza Haji Hossein, Rahil Khoshnazar

Erschienen in: Proceedings of the Canadian Society for Civil Engineering Annual Conference 2023, Volume 6

Verlag: Springer Nature Switzerland

Aktivieren Sie unsere intelligente Suche, um passende Fachinhalte oder Patente zu finden.

search-config
loading …

Abstract

Cementitious mixtures incorporating carbon nanofibers (CNFs) have emerged as new construction materials with enhanced mechanical and electrical performance. Due to their high strength, small size, and high aspect ratio, CNFs have the potential to bridge the cracks, limit their propagation, and fill the pores inside cementitious mixtures. Therefore, there has been a growing interest in the utilization of CNFs in the concrete industry, especially for the production of ultra-high-performance concretes (UHPCs) and self-sensing cementitious mixtures for structural health monitoring applications. Thus far, several studies have focused on the compressive strength of cementitious mixtures incorporating various nanomaterials including CNFs at the age of 28 days. The enhancing effect of CNFs on the early-age compressive strength of cementitious mixtures (i.e., up to 7 days of age), however, has not been largely investigated. Such early-age mechanical performance improvements are important to promote wider applications of CNFs in the concrete industry, for example, to compensate for the delays in the strength development of concretes made with large volumes of supplementary cementitious materials (SCMs). To fill this gap, the current paper aims to evaluate the effect of incorporating CNFs in various concentrations on the heat of hydration and compressive strength development of cement pastes in the first 7 days after production. Aqueous dispersions containing different concentrations of CNFs and a polycarboxylate ether (PCE)-based superplasticizer were prepared, subjected to ultrasound energy, and added to cement pastes at the time of mixing. The superplasticizer content in each mixture was adjusted so that all the cement pastes had a similar flow. The cement pastes were tested for isothermal calorimetry and compressive strength at the ages of 1, 3, and 7 days. Furthermore, scanning electron microscopy (SEM) was used to evaluate the dispersion of CNFs in the cement pastes.

Sie haben noch keine Lizenz? Dann Informieren Sie sich jetzt über unsere Produkte:

Springer Professional "Wirtschaft+Technik"

Online-Abonnement

Mit Springer Professional "Wirtschaft+Technik" erhalten Sie Zugriff auf:

  • über 102.000 Bücher
  • über 537 Zeitschriften

aus folgenden Fachgebieten:

  • Automobil + Motoren
  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Elektrotechnik + Elektronik
  • Energie + Nachhaltigkeit
  • Finance + Banking
  • Management + Führung
  • Marketing + Vertrieb
  • Maschinenbau + Werkstoffe
  • Versicherung + Risiko

Jetzt Wissensvorsprung sichern!

Springer Professional "Technik"

Online-Abonnement

Mit Springer Professional "Technik" erhalten Sie Zugriff auf:

  • über 67.000 Bücher
  • über 390 Zeitschriften

aus folgenden Fachgebieten:

  • Automobil + Motoren
  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Elektrotechnik + Elektronik
  • Energie + Nachhaltigkeit
  • Maschinenbau + Werkstoffe




 

Jetzt Wissensvorsprung sichern!

Springer Professional "Wirtschaft"

Online-Abonnement

Mit Springer Professional "Wirtschaft" erhalten Sie Zugriff auf:

  • über 67.000 Bücher
  • über 340 Zeitschriften

aus folgenden Fachgebieten:

  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Finance + Banking
  • Management + Führung
  • Marketing + Vertrieb
  • Versicherung + Risiko




Jetzt Wissensvorsprung sichern!

Literatur
2.
Zurück zum Zitat D’Alessandro A, Pisello AL, Sambuco S, Ubertini F, Asdrubali F, Materazzi AL, Cotana F (2016) Self-sensing and thermal energy experimental characterization of multifunctional cement-matrix composites with carbon nano-inclusions. In: Goulbourne NC (ed) Behavior and mechanics of multifunctional materials and composite. p 98000Z. https://doi.org/10.1117/12.2218680 D’Alessandro A, Pisello AL, Sambuco S, Ubertini F, Asdrubali F, Materazzi AL, Cotana F (2016) Self-sensing and thermal energy experimental characterization of multifunctional cement-matrix composites with carbon nano-inclusions. In: Goulbourne NC (ed) Behavior and mechanics of multifunctional materials and composite. p 98000Z. https://​doi.​org/​10.​1117/​12.​2218680
12.
Zurück zum Zitat ASTM C305 (2020) Standard practice for mechanical mixing of hydraulic cement pastes and mortars of plastic consistency. ASTM Stand ASTM C305 (2020) Standard practice for mechanical mixing of hydraulic cement pastes and mortars of plastic consistency. ASTM Stand
13.
Zurück zum Zitat ASTM C1437 (2020) Standard test method for flow of hydraulic cement mortar. ASTM Stand ASTM C1437 (2020) Standard test method for flow of hydraulic cement mortar. ASTM Stand
14.
Zurück zum Zitat ASTM C109 (2021) Standard test method for compressive strength of hydraulic cement mortars (Using 2-in. or [50 mm] cube specimens). ASTM Stand ASTM C109 (2021) Standard test method for compressive strength of hydraulic cement mortars (Using 2-in. or [50 mm] cube specimens). ASTM Stand
Metadaten
Titel
Early-Age Properties of Cement Pastes Incorporating Aqueous Dispersions of Carbon Nanofibers
verfasst von
Ali Teymouri
Alireza Haji Hossein
Rahil Khoshnazar
Copyright-Jahr
2025
DOI
https://doi.org/10.1007/978-3-031-61507-8_12