PSI - Issue 67

Daniel A. Triana-Camacho et al. / Procedia Structural Integrity 67 (2025) 47–52 D.A. Triana-Camacho et al. / Structural Integrity Procedia 00 (2024) 000–000

50

4

EDS Element Wt% CK 51.08

At% 68.68 14.58 00.44 03.14 05.19 00.89 00.22 06.65 00.21 ZAF

14.44 00.67 05.25 09.02 01.77 00.54 16.51 00.73

OK

MgK

AlK SiK

SK KK

CaK FeK

Correction

Matrix

Graphene sheets

Fig. 2. SEM and EDS characterization of rGO-cement-based composites.

Fig. 3. Capacitance as a function of electrochemical voltage ϕ for specimens elaborated by Method 1 (M1-sonicator dispersion) and Method 2 (M2-ultrasonic tip set).

to the M1 specimens, ranging between 269 µ F and 346 µ F, and stabilizing at 326 µ F with a compressive load close to 2500 N. Conversely, in Figure 4(b), M1 reveals a decrease in capacitance and also follows a nonlinear behavior. Additionally, M2 achieves a sensitivity exceeding 20% when the deformation exceeds 5000 µ ε , and maintains a linear behavior for low deformations indicating better rGO dispersion (under percolation threshold) despite the amount of rGO in both methodologies being the same.