THE USE OF MICROWAVES TO DETERMINE THE FREE WATER CONTENT IN A CEMENT PASTE DURING HYDRATION

DETERMINATION PAR MICROONDES DE LA TENEUR EN EAU LIBRE, DANS UNE PATE DE CIMENT EN COURS D'HYDRATATION

The hydration of cement is a phenomenon which can be evaluated by means of hyperfrequency dielectric measurements, but the various methods which have been developed for other types of study are not well adapted to this kind of material. A new method is proposed, that uses a parallel piped resonant cavity of varying length. The samples consist of small glass or rigid plastic tubes which have been filled with fresh cement paste to be studied. Complex dielectric constant measurements were made on three types of cement paste at 3000 mhz. They show that variations in the dielectric constant as a function of the time passed since mixing accurately reflect the cement hydration rate. This method could be applied to the control of the setting of mortar and fresh concrete. /TRRL/

  • Corporate Authors:

    Masson

    120 Boulevard Saint-Germain
    75280 Paris Cedex 06,   France 
  • Authors:
    • Reboul, J P
  • Publication Date: 1976-10

Language

  • French

Media Info

  • Features: Figures; References;
  • Pagination: p. 373-377
  • Serial:
    • Analysis
    • Volume: 4
    • Issue Number: 8
    • Publisher: Masson

Subject/Index Terms

Filing Info

  • Accession Number: 00179946
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Sep 27 1978 12:00AM