DETERMINATION OF MOISTURE CONTENT OF CONCRETE BY MICROWAVE- RESONANCE METHOD

A NEW METHOD OF MEASURING THE MOISTURE CONTENT OF CONCRETE AND OTHER BUILDING MATERIALS IS DESCRIBED. THE METHOD IS BASED ON THE MEASUREMENT OF THE DIELECTRIC CONSTANT AT MICROWAVE FREQUENCIES. STUDIES ON CONCRETE HAVE SHOWN THAT A LINEAR RELATION EXISTS BETWEEN THE EVAPORABLE WATER CONTENT OF CONCRETE AND THE INSTRUMENT READING. THE MAIN ADVANTABES OF THIS METHOD ARE THAT IT IS NONDESTRUCTIVE, THE RESPONSE OF THE INSTRUMENT IS RAPID, HUMIDITY GRADIENTS IN THE SPECIMEN CAN BE STUDIED, MEASUREMENTS ARE INDEPENDENT OF THE DIELECTRIC LOSSES AND THE CONDUCTIVITY OF THE MATERIAL, AND THE SHARP RESONANCE PEAK OF THE MICROWAVES ALLOWS VERY ACCURATE MEASUREMENTS. /DOT/

• Authors:
  • Bhargava, J
  • LUNDBERG, K
• Publication Date: 1972-5

Media Info

• Pagination: p. 165-8
• Serial:
  • Matls & Structures, Res & Testing /Fr/
  • Volume: 5
  • Issue Number: 27

Subject/Index Terms

• TRT Terms: Accuracy; Concrete; Dielectric properties; Measurement; Microwaves; Moisture content; Nondestructive tests
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00214207
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 30 1973 12:00AM