Testing pH of Concrete: Need for a Standard Procedure

Carbonation in concrete describes the reaction between alkalis in the concrete and carbon dioxide in the atmosphere. Concrete fronts, which normally start with pH values of about 13, can advance below exposed surfaces with pH values of about 8.5 if carbonation occurs. The authors discuss the results of testing performed through assessing test standards and methods, informally surveying associations and professionals, and conducting a literature survey. Procedural variable influence on measured test results is also quantified. The authors argue that, although other factors do play a role, study results indicate that pH value is most greatly affected by temperature and dilution ratio. Measuring pH with a 1:2 dilution ratio seems practical. Since different testing methods produce significantly different results, the authors recommend different methods for field and laboratory testing and recommend procedures for each scenario.

  • Availability:
  • Authors:
    • Grubb, Jennifer A
    • Limaye, Hemant S
    • Kakade, Ashok M
  • Publication Date: 2007-4

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; Photos; References; Tables;
  • Pagination: pp 78-83
  • Serial:
    • Concrete International
    • Volume: 29
    • Issue Number: 4
    • Publisher: American Concrete Institute (ACI)
    • ISSN: 0162-4075

Subject/Index Terms

Filing Info

  • Accession Number: 01046912
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 16 2007 6:43PM