Characterization of concrete properties from dielectric properties using ground penetrating radar

Abstract This paper presents the 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 (GPR). The former (LWAC) refers to compressive strength, apparent porosity and saturated density, while the latter (NAC) refers to real part of dielectric permittivity ( e ' 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, we compare the characteristics of how much and how fast free water was turned to absorbed water in LWAC and NAC. The underlying mechanisms and a mechanistic model are then developed.

[1]  V. M. Malhotra,et al.  CRC Handbook on Nondestructive Testing of Concrete , 1990 .

[2]  M. A. K. Hamid,et al.  Monitoring of Concrete Curing Process by Microwave Terminal Measurements , 1972, IEEE Transactions on Industrial Electronics and Control Instrumentation.

[3]  W. L. Lai,et al.  Experimental determination of bulk dielectric properties and porosity of porous asphalt and soils using GPR and a cyclic moisture variation technique , 2006 .

[4]  Wai-lok Wallace Lai.  Characterization of porous construction materials using electromagnetic radar wave , 2006 .

[5]  J. Rhazi,et al.  Non-destructive evaluation of concrete moisture by GPR: Experimental study and direct modeling , 2005 .

[6]  Steve Millard,et al.  Dielectric properties of concrete and their influence on radar testing , 2000 .

[7]  Steve Millard,et al.  RADAR ASSESSMENT OF POST-TENSIONED CONCRETE , 1997 .

[8]  Rosemary Knight,et al.  Hysteresis in the electrical resistivity of partially saturated sandstones , 1991 .

[9]  Johan Alexander Huisman,et al.  Measuring soil water content with ground penetrating radar , 2003 .

[10]  J. Rhazi,et al.  Influence of concrete relative humidity on the amplitude of Ground-Penetrating radar (GPR) signal , 2002 .

[11]  W. L. Lai,et al.  Characterization of pore systems of air/water-cured concrete using ground penetrating radar (GPR) through continuous water injection , 2008 .

[12]  Ping Gu,et al.  Dielectric behaviour of hardened cementitious materials , 1997 .

[13]  C. Balanis.  Advanced Engineering Electromagnetics , 1989 .

[14]  Michael David Knoll,et al.  A petrophysical basis for ground penetrating radar and very early time electromagnetics : electrical properties of sand-clay mixtures , 1996 .

[15]  Leif Berntsson,et al.  Lightweight aggregate concrete : science, technology, and applications , 2003 .

[16]  A. P. Annan,et al.  Measuring Soil Water Content with Ground Penetrating Radar: A Review , 2003 .

[17]  Fawwaz T. Ulaby,et al.  Dielectric properties of soils in the 0.3-1.3-GHz range , 1995, IEEE Trans. Geosci. Remote. Sens..

[18]  D. Daniels.  Ground Penetrating Radar , 2005 .

[19]  J. H. Bungey,et al.  SUB-SURFACE RADAR TESTING OF CONCRETE: A REVIEW , 2004 .

[20]  S. Chandra,et al.  10th International congress on the chemistry of cement , 1997 .

[21]  T. Schmugge,et al.  An Empirical Model for the Complex Dielectric Permittivity of Soils as a Function of Water Content , 1980, IEEE Transactions on Geoscience and Remote Sensing.

[22]  İbrahim Türkmen,et al.  Effects of expanded perlite aggregate and different curing conditions on the physical and mechanical properties of self-compacting concrete , 2007 .

[23]  Allan J. Delaney,et al.  Dielectric properties of soils at UHF and microwave frequencies 36R. J. Geophys. Res. V79, N11, Apr. 1974, P1699–1708 , 1974 .

[24]  Mk Meint Smit,et al.  Microwave study of hydrating cement paste at early age , 1982 .

[25]  Hong C. Rhim.  Condition monitoring of deteriorating concrete dams using radar , 2001 .

[26]  R. Knight,et al.  Geometrical Effects In The Dielectric Response Of Partially Saturated Sandstones , 1987 .

[27]  A. Neville.  Properties of Concrete , 1968 .

[28]  Doreen Streicher,et al.  Results of reconstructed and fused NDT-data measured in the laboratory and on-site at bridges , 2006 .