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A novel heterogeneous model of concrete for numerical modelling of ground penetrating radar

Abstract

The ground penetrating radar (GPR) method has increasingly been applied in the non-destructive testing of reinforced concrete structures. The most common approach to the modelling of radar waves is to consider concrete as a homogeneous material. This paper proposes a novel, heterogeneous, numerical model of concrete for exhaustive interpretation of GPR data. An algorithm for determining the substitute values of the material constants of concrete is developed, based on the modified complex refractive index method. Experimental surveys and numerical simulations are conducted on a concrete laboratory sample with a controlled degree of saturation, and on a real concrete slab with two different degrees of saturation. The results indicate that the proposed model is fully capable of realistic finite-difference time-domain modelling of concrete for ground penetrating radar diagnostics of civil engineering structures with changing water content.

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Details

Category:
Magazine publication
Type:
artykuły w czasopismach
Published in:
CONSTRUCTION AND BUILDING MATERIALS no. 227, pages 1 - 12,
ISSN: 0950-0618
Language:
English
Publication year:
2019
Bibliographic description:
Jacek L., Rucka M.: A novel heterogeneous model of concrete for numerical modelling of ground penetrating radar// CONSTRUCTION AND BUILDING MATERIALS -Vol. 227, (2019), s.1-12
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.conbuildmat.2019.116703
Verification:
Gdańsk University of Technology

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