Drying Shrinkage Behaviour of Fibre Reinforced Concrete Incorporating Polyvinyl Alcohol Fibres and Fly Ash
Table 6
Compressive strength of control and FRC at 7, 28, and 56 days.
Mix designation
7-day strength—
28-day strength—
56-day strength—
Average strengtha
Strength effectiveness
Average strength
Strength effectiveness
Average strength
Strength effectiveness
[MPa ± SDb]
[%]
[MPa ± SD]
[%]
[MPa ± SD]
[%]
Control
46.0 ± 1.7
N/A
60.0 ± 3.2
N/A
72.5 ± 3.0
N/A
6-PVA-0.125
45.0 ± 0.5
−2.1
65.0 ± 4.6
+8.3
79.0 ± 2.1
+9.0
6-PVA-0.250
48.0 ± 4.1
+4.3
67.0 ± 3.2
+11.7
82.5 ± 4.2
+13.8
6-PVA-0.375
43.0 ± 1.8
−6.5
62.0 ± 2.3
+3.3
73.5 ± 2.6
+1.4
6-PVA-0.500
40.5 ± 3.5
−12.0
61.5 ± 2.5
+2.5
70.0 ± 3.8
−3.4
12-PVA-0.125
41.5 ± 1.0
−9.7
63.0 ± 1.8
+5.0
70.5 ± 2.8
−2.8
12-PVA-0.250
43.5 ± 3.6
−5.4
64.5 ± 3.2
+7.5
73.0 ± 2.9
+0.7
12-PVA-0.375
41.0 ± 2.6
−10.9
60.0 ± 1.7
0.00
67.5 ± 1.5
−6.9
12-PVA-0.500
39.5 ± 2.4
−14.1
58.5 ± 2.8
−2.5
64.0 ± 4.2
−11.7
Average compressive strength of the test specimens calculated to the nearest 0.5 MPa in accordance with AS 1012.9.
bSD: standard deviation (reported out of 3 specimens tested for each age).
