MONITORING HYDRATION OF ALKALI-ACTIVATED SLAG AND FLY ASH

This paper presents developments in electrical impedance methods to study hydration and reaction kinetics of alkali activated slags and fly ash at room temperature (i.e. 21 degrees C). To highlight the testing methodology, work focuses on monitoring the temporal change in both conductance and capacitance of a typical slag and low-lime fly ash activated with calcium hydroxide. It is also shown that the measured electrical parameters change markedly with frequency of applied electrical field. The latter was found particularly relevant to capacitance measurements.

• Corporate Authors:

  American Concrete Institute (ACI)

  38800 Country Club Drive
  Farmington Hills, MI  United States  48331
• Authors:
  • Ezirim, H C
  • McCarter, W J
• Conference:
  • Fly Ash, Silica Fume, Slag and Natural Pozzolans in Concrete
  • Location: Bangkok, Thailand
  • Date: 1998-5-31 to 1998-6-5
• Publication Date: 1998

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 821-836
• Serial:
  • Volume: 2

Subject/Index Terms

• TRT Terms: Alkali aggregate reactions; Calcium hydroxide; Capacitance; Fly ash; Hydration; Slag
• Uncontrolled Terms: Conductivity
• Old TRIS Terms: Electrical parameters
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00754896
• Record Type: Publication
• Report/Paper Numbers: SP 178-42
• Files: TRIS
• Created Date: Oct 9 1998 12:00AM