Studies on early stage hydration of tricalcium silicate incorporating silica nanoparticles: Part I

L. P. Singh*, S. K. Bhattacharyya, S. P. Shah, G. Mishra, S. Ahalawat, U. Sharma

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

47 Scopus citations

Abstract

Hydration of tricalcium silicate (C3S) in presence of nano silica at early stage has been investigated and formation of addition calcium silicate hydrate (C-S-H) has been quantitatively estimated. Prepared C3S was hydrated in the presence of powder nanosilica (30-70 nm) using w/b ratio 0.4 for paste study and 5.0 for aqueous phase study. Results of ICP and XRD showed that the stage of supersaturation of Ca2+ is delayed by 30 min and formation of secondary/additional C-S-H starts at the early stages of C3S hydration in the presence of nano silica. This additional C-S-H is responsible for higher dissolution of C3S as observed by FTIR. SEM/EDX results show the formation of denser C-S-H with low C/S ratio in the presence of nano silica, whereas TG analysis revealed the formation of additional C-S-H (∼50%) in nano silica incorporated C3S system which is accountable for the higher specific surface area as obtained by N2-adsorption.

Original languageEnglish (US)
Pages (from-to)278-286
Number of pages9
JournalConstruction and Building Materials
Volume74
DOIs
StatePublished - Jan 15 2015

Keywords

  • C-S-H
  • Hydration
  • Nano silica
  • Tricalcium silicate

ASJC Scopus subject areas

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

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