Characterization of Concrete Properties from Dielectric Properties Using Ground Penetrating Radar

This paper presents experimental results of a study of the relationships between light-weight (LWAC) and normal aggregate concrete (NAC) properties, as well as radar wave properties that are derived by using ground penetrating radar. The former (LWAC) refers to compressive strength, apparent porosity, and saturated density, while the latter (NAC) refers to real part of dielectric permittivity (ε' or real permittivity) and wave energy level (E). Throughout the test period of the newly cast concrete cured for 90 days, the above mentioned material properties gradually changed which can be attributed to the effects of cement hydration, different types of aggregates, and initial water to binder ratios. A number of plots describing various properties of concrete such as dielectric, strength, and porosity perspectives were established. From these plots, characteristics of how much/how fast free water was turned to absorbed water in LWAC and NAC are compared. The underlying mechanisms and a mechanistic model are then developed.

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  • English

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  • Accession Number: 01142300
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 20 2009 3:16PM