Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/8571
Title: Characterization of pore systems of air/water-cured concrete using ground penetrating radar (GPR) through continuous water injection
Authors: Lai, WL
Tsang, WF 
Keywords: Curing history of concrete
Ground penetrating radar
Pore system of concrete
Water
Issue Date: 2008
Publisher: Elsevier
Source: Construction and building materials, 2008, v. 22, no. 3, p. 250-256 How to cite?
Journal: Construction and building materials 
Abstract: This paper describes a series of experiments in characterizing the pore systems of mature and hardened air-cured and water-cured concrete specimens. The characterization was achieved by measuring the real part of complex permittivity (ε′) and energy attenuation (dB/m) through continuous injection of pressurized fresh water over a period of 48 h in each test run. The measurements were based on coupling a 1 GHz Ground Penetrating Radar (GPR) on the surfaces of concrete specimens. At different degrees of water saturation (S w) received by the specimens, the air-cured and water-cured concrete specimens were characterized by recognizing different patterns depicted in the plots of ε′ vs S w and dB/m vs S w. These differences in patterns are attributed to the pore size distributions, as a result of different curing histories.
URI: http://hdl.handle.net/10397/8571
ISSN: 0950-0618
DOI: 10.1016/j.conbuildmat.2006.08.021
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