Microstructural Characterization of Leaching Effects in Cement Pastes Due to Neutralisation of their Alkaline Nature. Part I: Portland Cement Pastes

When concrete is exposed to the elements, its underlying microstructure can be attacked by a variety of aggressive agents (e.g., rainwater and groundwater. The knowledge of concrete resistance to long term water aggression is necessary for predictions of their performance in different environments. This study aims to analyze the effects of leaching on the microstructure of Portland cement binders. Leaching of cement pastes was performed by an accelerated extraction leaching test that produces significant degradation and helps to achieve equilibrium or near-equilibrium conditions between the leachant medium and cement paste. FTIR spectroscopy, TG-DTA thermal analysis, low temperature nitrogen gas sorption, and geochemical modeling were used to characterize the microstructural changes produced in cement pastes at different equilibrium pHs reached during the leaching process.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00088846
• Supplemental Notes:
  • Abstract reprinted with permission from Elsevier
• Authors:
  • Hidalgo, A
  • Petit, S
  • Domingo, C
  • Alonso, Cruz
  • Andrade, Carmen
• Publication Date: 2007-1

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 63-70
• Serial:
  • Cement and Concrete Research
  • Volume: 37
  • Issue Number: 1
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Alkalinity; Binders; Cement paste; Concrete construction; Corrosion; Durability; Leaching; Microstructure; Portland cement concrete; Structural deterioration and defects
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01042213
• Record Type: Publication
• Files: TRIS
• Created Date: Mar 1 2007 8:37AM