Table 1:
Concrete Mix Design.
| Group | Mix | Cement [Kg/m3] | W/C | Fine Aggregate [Kg/m3] | Corse Aggregate [Kg/m3] | SP [Kg/m3] | Go [Kg/m3] |
|---|---|---|---|---|---|---|---|
| Group 1 | Mix 1 | 450 | 0.3 | 800 | 1000 | 9 | 0 |
| Mix 2 | 450 | 0.3 | 800 | 1000 | 9 | 45 | |
| Mix 3 | 450 | 0.3 | 800 | 1000 | 9 | 225 | |
| Group 2 | Mix 4 | 380 | 0.35 | 950 | 950 | 7.6 | 0 |
| Mix 5 | 380 | 0.35 | 950 | 950 | 7.6 | 38 | |
| Mix 6 | 380 | 0.35 | 950 | 950 | 7.6 | 190 |
Table 2:
Mechanical Characteristic of the Concrete.
| Mix | Slump [mm] | Compressive Strength [MPa] | Tensile Strength [MPa] | ||
|---|---|---|---|---|---|
| 7 days | 28 days | 7 days | 28 days | ||
| 1 | 55 | 38 | 53 | 1.81 | 2.33 |
| 2 | 59 | 40 | 58 | 1.93 | 2.62 |
| 3 | 50 | 45 | 62 | 2.14 | 2.83 |
| 4 | 62 | 26 | 41 | 1.4 | 1.89 |
| 5 | 66 | 31 | 48 | 1.61 | 2.15 |
| 6 | 58 | 36 | 55 | 1.87 | 2.68 |
Table 3:
Beams Designations and Reinforcement Details.
| Beams Designation | GO [%] | Reinforcement Ratio [%] |
|---|---|---|
| B1- CO | 0 | 0.45 |
| B2- 0.01% GO | 0.01 | 0.45 |
| B3- 0.05% GO | 0.05 | 0.45 |
| B4- CO | 0 | 0.45 |
| B5- 0.01% GO | 0.01 | 0.45 |
| B6- 0.05% GO | 0.05 | 0.45 |
Fig. 1:
Beam Details and Cross Section (all dimensions are in mm).
Fig. 2:
Influence of GO Content on Compressive Strength at (a) 7 Days and (b) 28 Days.
Fig. 3:
Influence of GO Content on Splitting Tensile Strength at (a) 7 Days and (b) 28 Days.
Fig. 4:
Load-Deflection Behaviour (a) Group 1 (b) Group 2.
Fig. 5:
Effect of Graphene Oxide Content on Deflection and Ultimate Load Capacity of Reinforced Concrete Beams.
Table 4:
Cracking Load, Ultimate Load, Deflections, and Ductility of Reinforced Concrete Beams with Different Graphene Oxide Contents.
| Parameter | B1-CO | B2-0.01% GO | B3-0.05% GO | B4-CO | B5-0.01% GO | B6-0.05% GO |
|---|---|---|---|---|---|---|
| Pcr [kN] | 35 | 40 | 45 | 25 | 30 | 35 |
| Δcr [mm] | 1.5 | 1.2 | 1.0 | 1.8 | 1.5 | 1.2 |
| Pu [kN] | 64 | 68 | 75 | 42 | 54 | 61 |
| Δu[mm] | 6.2 | 5 | 4.8 | 7.5 | 8 | 9 |
| Ductility* | 4.1 | 4.2 | 4.8 | 4.2 | 5.3 | 7.5 |