Composite Strain Hardening Properties of High Performance Hybrid Fibre Reinforced Concrete
Table 4
Compressive and flexural properties of various mono- and hybrid fibre concretes.
Mechanical properties
Fibre types
Monofibre types
Hybrid fibre types
PP 47 mm
PP 23.5 mm
SF 60 mm
SF 35 mm
PP 47 mm and PP 23.5 mm
SF 60 mm and SF 35 mm
PP 47 mm and SF 60 mm
PP 23.5 mm and SF 60 mm
PP 47 mm and SF 35 mm
PP 23.5 mm and SF 35 mm
Compressive strength (Mpa)
35.74
28.5
34.25
47.8
31.3
46.21
38.03
40.1
43.25
48.56
Flexural strength (Mpa)
5.67
5.95
5.41
6.08
5.75
7.78
6.81
6.63
6.78
7.52
Residual strength (KN)
3.78
3.12
3.94
4.12
4.45
6.28
5.13
5.35
5.89
6.56
Absolute toughness (N-m)
62.45
13.2
112.4
51.5
25.6
104.2
121.4
80.12
110.4
98.5
Postcrack toughness (N-m)
51.3
8.42
50.9
59.45
24.7
84.2
110.45
75.2
108.9
95.3
Residual toughness (N-m)
48.3
7.4
34.95
17.3
18.1
82.35
112.45
72.41
95.52
86.15
Note. PP: polypropylene fibres; SF: steel fibres. Test results denote average of 5 concrete samples for each concrete mix. Standard deviation of compressive strength: 6.75 MPa; coefficient of variance: 0.172. Standard deviation of flexural strength: 3.12 MPa; coefficient of variance: 0.135.
