Detecting flaws in Portland cement concrete using TEM horn antennae

Imad L. Al-Qadi; Sedki M. Riad; Wansheng Su; Rami H. Haddad

doi:10.1117/12.259150

13 November 1996 Detecting flaws in Portland cement concrete using TEM horn antennae

Imad L. Al-Qadi, Sedki M. Riad, Wansheng Su, Rami H. Haddad

Proceedings Volume 2946, Nondestructive Evaluation of Bridges and Highways; (1996) https://doi.org/10.1117/12.259150
Event: Nondestructive Evaluation Techniques for Aging Infrastructure and Manufacturing, 1996, Scottsdale, AZ, United States

Abstract

To understand the dielectric properties of PCC and better correlate them with type and severity of PCC internal defects, a study was conducted to evaluate PCC complex permittivity and magnetic permeability over a wideband of frequencies using both time domain and frequency domain techniques. Three measuring devices were designed and fabricated: a parallel plate capacitor, a coaxial transmission line, and transverse electromagnetic (TEM) horn antennae. The TEM horn antenna covers the microwave frequencies. The measurement technique involves a time domain setup that was verified by a frequency domain measurement. Portland cement concrete slabs, 60 by 75 by 14 cm, were cast; defects include delamination, delamination filled with water, segregation, and chloride contamination. In this paper, measurements using the TEM horn antennae and the feasibility of detecting flaws at microwave frequency are presented.

Citation Download Citation

Imad L. Al-Qadi, Sedki M. Riad, Wansheng Su, and Rami H. Haddad "Detecting flaws in Portland cement concrete using TEM horn antennae", Proc. SPIE 2946, Nondestructive Evaluation of Bridges and Highways, (13 November 1996); https://doi.org/10.1117/12.259150

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