MEASURING DIELECTRIC PROPERTIES OF PORTLAND CEMENT CONCRETE: NEW METHODS

Electrical characterization of Portland cement concrete (PCC) is necessary for reliable operation of electromagnetic nondestructive evaluation (NDE) techniques. Examples of such techniques include ground penetration radar (GPR). To better understand the dielectric properties of PCC, a study was conducted to evaluate PCC complex permittivity and magnetic permeability over a wide band of frequencies (100 KHz-10 GHz) using both time domain and frequency domain techniques. To achieve this, three measuring devices were designed and built: a parallel plate capacitor, a coaxial line fixture and a TEM horn antenna. The parallel plate capacitor covers the low radio frequencies (RF) characterization (0.1- 40 MHz). The coaxial setup covers the frequency spectrum of 100-1000 MHz while the antenna covers the microwave frequencies (1-10 GHz). The PCC specimen under test assumes different geometry for different setups: a prism for capacitor setup, a cylinder for the coaxial setup, and a rectangular slab for the antenna setup. This paper presents the design of the three setups.

• Corporate Authors:

  Technomic Publishing Company, Incorporated

  851 New Holland Avenue, Box 3535
  Lancaster, PA  United States  17604
• Authors:
  • Al-Qadi, I L
  • Mostafa, R
  • SU, W
  • Riad, S M
• Conference:
  • Structural Materials Technology. An NDT Conference.
  • Location: San Diego, CA
  • Date: 1996-2-20 to 1996-2-23
• Publication Date: 1996

Language

• English

Media Info

• Features: Figures; References;
• Pagination: p. 16-27

Subject/Index Terms

• TRT Terms: Antennas; Design; Dielectric properties; Electromagnetic frequencies; Ground penetrating radar; Magnetic properties; Measurement; Methodology; Nondestructive tests; Permeability; Portland cement concrete; Prisms; Rectangles; Shape; Tests
• Uncontrolled Terms: Cylinders; Geometry (Shape)
• Old TRIS Terms: Magnetization
• Subject Areas: Design; Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00725849
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 10 1996 12:00AM