Hydration Behaviour, Structure and Morphology of Hydration Phases in Advanced Cement-based Systems Containing Micro and Nanoscale Pozzolanic Additives

This paper deals with the early hydration and structural development aspects of advanced cement-based systems that contain micro and nanoscale pozzolanic additives. The authors used highly reactive colloidal silica produced by pyrogenic route (pyrogene oxides) as representative of nanoscale pozzolanic additives. Colloidal silica shortens the induction period to an extent that can be qualitatively correlated to the size of its primary silica particles and the specific surface area. Colloidal silica accelerates the early hydration reactions by providing large amounts of reactive siliceous surface, which serves as a site for the early C-S-H precipitation. Additionally the use of pozzolanic additives as cement replacement smooths and reduces the heat of hydration evolved. The high performance specimens that contain microscale additives and especially those that contain both micro and nanoscale additives are characterized by very tight structure and are made up of finer structures in closer contact than the normal performance specimen without pozzolanic additive.

• Record URL:
  • https://doi.org/10.1016/j.cemconres.2008.02.010
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00088846
• Supplemental Notes:
  • Abstract reprinted with permission from Elsevier
• Authors:
  • Korpa, A
  • Kowald, T
  • Trettin, R
• Publication Date: 2008-7

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 955-962
• Serial:
  • Cement and Concrete Research
  • Volume: 38
  • Issue Number: 7
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Cement; Heat of hydration; Microstructure; Nanostructured materials; Pozzolan
• Uncontrolled Terms: Colloidal silica
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01103746
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 30 2008 8:27AM