Formation Factor Demystified and its Relationship to Durability

Details

• Creators:
  Tanesi, Jussara ; Ardani, Ahmad ; Montanari, Luca
• Corporate Creators:
  United States. Federal Highway Administration
• Corporate Contributors:
  Turner-Fairbank Highway Research Center
• Subject/TRT Terms:
  • Electrical resistivity
  • Durability
  • Pore space
  • Concrete
• Publication/ Report Number:
  FHWA-HRT-19-030
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  United States. Federal Highway Administration
• Abstract:
  Electrical resistivity is a property that indicates the material’s resistance to the passage of electrical charges at a defined temperature. In concrete, resistivity is directly proportional to the resistivity of the pore solution, and inversely proportional to the volume and connectivity of the pores. Formation factor is the ratio of concrete resistivity to its pore solution resistivity. When used instead of concrete resistivity, the formation factor provides an indication of the total pore volume and how the pores are interconnected among each other. This TechBrief covers: What the concrete resistivity test really measures; Why the formation factor should be used instead; Streamlining the formation factor calculation using the "bucket test"; and current formation factor research at the Turner-Fairbank Highway Research Center.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/40951/dot_40951_DS1.pdf
• File Type:
  [PDF - 1.46 MB]
• Collection(s):
  Federal Highway Administration
• Main Document Checksum:
  urn:sha-512:8c00b0ca397c9a593a7a851bd88922d07e5c81139c6d5f44bf9b83350515ab6d6252cb086b1296d1b76d1809a0c8c88e416f73efea537a007b7cf7a3998514bc