Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Average of compressive strength, modulus of elasticity, and modulus of rupture
| Specimen | Average compressive strength (MPa) | Average modulus of elasticity (MOE) (GPa) | Average modulus of Rupture (MOE) (MPa) | |
|---|---|---|---|---|
| P2 | Precast beam | 40.95 | 30.697 | 4.03 |
| Precast column | 55.87 | 28.940 | 5.42 | |
| CIP-concrete | 50.86 | 31.518 | 5.99 | |
| P3 | Precast beam | 36.82 | 30.461 | 5.36 |
| Precast column | 42.83 | 28.009 | 5.21 | |
| CIP-concrete | 47.36 | 33.782 | 6.06 | |
| P4 | Precast beam | 50.58 | 31.304 | 5.88 |
| Precast column | 51.35 | 29.841 | 5.65 | |
| CIP-concrete | 60.26 | 42.679 | 7.76 | |
Properties of the steel fibers
| Brand | Dramix RC 65 35 BN |
| Length (lf) | 35 mm |
| Diameter (df) | 0.55 mm |
| Aspect ratio (lf/df) | 65 |
| Tensile strength | 1345 N/mm2 |
| Young's Modulus (Emod) | 210000 N/mm2 |
Material composition of precast elements and CIP-connection of specimens P2, P3, and P4
| Materials | Precast elements | CIP-connection of P2 | CIP-connection of P3 | CIP-connection of P4 |
|---|---|---|---|---|
| Coarse aggregate (kg/m3) | 1000.55 | 1028.4 | 1028.4 | 1028.4 |
| Fine aggregate (kg/m3) | 818.63 | 685.6 | 685.6 | 685.6 |
| Cement (kg/m3) | 335.82 | 441 | 441 | 441 |
| Water (kg/m3) | 208 | 210 | 213 | 213 |
| Steel fiber (kg/m3) | – | – | 39.25 | 78.5 |
| w/c | 0.62 | 0.47 | 0.52 | 0.52 |
| Slump (mm) | 150 | 140 | 125 | 85 |
Comparison of the mechanical properties of the CIP-concrete of the PCBC specimens
| (Vf = 0%) | (Vf = 0.5%) | (Vf = 1.0%) | Increase compared to (Vf = 0%) | ||
|---|---|---|---|---|---|
| (Vf = 0.5%) | (Vf = 1.0%) | ||||
| Average of compressive strength (MPa) | 50.86 | 47.36 | 60.26 | −6.88 | 18.48 |
| Average modulus of elasticity (GPa) | 31.518 | 33.782 | 42.679 | 7.18 | 35.41 |
| Average modulus of rupture (MPa) | 5.99 | 6.06 | 7.76 | 1.17 | 29.55 |