UHF antenna design for the estimation of fiber density of Steel Fiber Reinforced Concrete

Steel Fiber Reinforced Concrete arises when steel fibers are included during the mixture process of the conventional concrete, improving some characteristics of the material as the resistance capacity against heavy efforts. Since this feature of the material depends on the quantity and distribution of fibers inside it, an accurate characterization of these parameters is needed. This paper describes an UHF antenna design for carrying out an estimation of the SFRC fiber density. Details of its characteristics as well as the results obtained from its use in a non-destructive measurement system of the SFRC fiber density are given in the following sections.