Ultrasonic Velocity and Attenuation in Epoxy Resin/Granite (Marble) Powder Composite

Comparative study of two biocomposites: Effect of date stone flour treated with potassium permanganate as a filler on the morphological and elastic properties

“…In the field of material characterization, ultrasonic testing is one of the NDT techniques widely used. 30,38 The evaluation of elastic properties by measuring the ultrasonic waves velocities in a given material requires prior knowledge of these characteristics. Two elastic constants are sufficient to completely define the elastic behavior in the case of isotropic materials.…”

“…The elastic properties of the samples were determined according to the following equations which are valid only for isotropic materials. 26,28,30,41–43 where ρe, L, G, K, E, µ, H, and Z are, respectively, the experimental density of the samples, the longitudinal modulus, shear modulus, bulk modulus, Young’s modulus of elasticity, Poisson’s ratio, ultrasonic micro-hardness, and acoustic impedance.…”

“…The elastic properties of the samples were determined according to the following equations which are valid only for isotropic materials. 26,28,30,[41][42][43]…”

“…In the same context, some researchers investigated the determination by ultrasonic testing of the different elastic properties of polymers such as, neat PMMA 25 as well as composites based on epoxy matrix loaded with particulate reinforcements or powders such as biochar, 26 andesite waste, 27 polyethylene carbon terephthalate (PET) powder, 28 olive wood flour (OWF), 29 and granite (marble) powder. 30…”

“…In the same context, some researchers investigated the determination by ultrasonic testing of the different elastic properties of polymers such as, neat PMMA 25 as well as composites based on epoxy matrix loaded with particulate reinforcements or powders such as biochar, 26 andesite waste, 27 polyethylene carbon terephthalate (PET) powder, 28 olive wood flour (OWF), 29 and granite (marble) powder. 30 In our previous study, 31 it was reported the effect of different chemical treatments such as alkali, benzoyl, and permanganate treatments on the elastic properties using the ultrasonic wave velocity measurement method in GER/DSF biocomposite, at a constant filler content of 30 wt%. Unlike the biocomposite based on the GER matrix and pre-treated DSF filler, the untreated DSF filler was not studied due to the settling phenomenon.…”