Research Article
Smart Aggregate-Based Concrete Stress Monitoring via 1D CNN Deep Learning of Raw Impedance Signals
Table 3
Material properties of components for SA sensor.
| Properties | PZT 5A | Epoxy layer | Concrete |
| Mass density, (kg/m3) | 7750 | 1090 | 2400 | Young’s modulus, (GPa) | 62.1 | 0.75 | 25.43 | Poisson’s ratio, | 0.35 | 0.3 | 0.2 | Compressive strength, (MPa) | | 32.3 | 25.3 | Damping loss factor, | 0.0125 | | | Dielectric constant, (F/m) | 1.53 × 10−8 | | | Coupling constant, (m/V) | −1.71 × 10−10 | | | Dielectric loss factor, | 0.015 | | |
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Compressive strength was determined by a uniaxial compressive test on three standard concrete cylinders (100 × 200 mm). |