Dispersion of CaCO3 nanoparticles by sonication and surfactant treatment for application in fly ash-cement systems

Shiho Kawashima, Jung Woo Ted Seo, David Corr, Mark C Hersam, Surendra P. Shah

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

This research aims to offset the negative effects of fly ash on the early-age properties of cementitious materials with the use of calcium carbonate (CaCO3) nanoparticles. The main focus is to enhance the effect of the nanoparticles by improving dispersion through ultrasonication and use of surfactants. CaCO3 aqueous suspensions with various surfactant types and concentrations are prepared and subjected to different sonication protocols (varying duration and amplitude). Dispersion and stability are quantitatively measured by comparing their absorbance spectra through spectrophotometry and qualitatively evaluated through SEM imaging. The effectiveness of sonicated CaCO3 nanoparticle additions in accelerating setting and improving early-age compressive strength gain of fly ash-cement pastes is investigated. The sonication protocol is optimized and the most effective dispersion is achieved with polycarboxylate-based superplasticizer. Good agreement is found between the dispersion measurements and mechanical performance.

Original languageEnglish
Pages (from-to)1011-1023
Number of pages13
JournalMaterials and Structures/Materiaux et Constructions
Volume47
Issue number6
DOIs
Publication statusPublished - 2014

Fingerprint

Coal Ash
Sonication
Fly ash
Surface-Active Agents
Cements
Surface active agents
Nanoparticles
Calcium Carbonate
Spectrophotometry
Calcium carbonate
Ointments
Compressive strength
Suspensions
Imaging techniques
Scanning electron microscopy

Keywords

  • Calcium carbonate
  • Cement and Concrete
  • Dispersion
  • Fly ash
  • Nanoparticles
  • Sonication

ASJC Scopus subject areas

  • Building and Construction
  • Civil and Structural Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

Dispersion of CaCO3 nanoparticles by sonication and surfactant treatment for application in fly ash-cement systems. / Kawashima, Shiho; Seo, Jung Woo Ted; Corr, David; Hersam, Mark C; Shah, Surendra P.

In: Materials and Structures/Materiaux et Constructions, Vol. 47, No. 6, 2014, p. 1011-1023.

Research output: Contribution to journalArticle

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