Polyvinyl Alcohol Fiber Length Optimization for High Ductility Cementitious Composites with Different Compressive Strength Grades
Table 4
Mechanical properties of the HDCCs with different fiber lengths.
HDCCs series
(mm)
(MPa)
Four-point bending properties
Tensile properties
(MPa)
(MPa)
(mm)
(MPa)
(MPa)
(%)
0.30–80%
6
36.7 ± 1.9
4.47 ± 0.32
11.9 ± 0.2
5.03 ± 0.16
43.50 ± 16
—
—
9
35.4 ± 1.3
5.15 ± 0.15
12.3 ± 0.5
6.84 ± 0.5
67.0 ± 5
4.91 ± 0.51
2.52 ± 0.31
12
35.9 ± 1.0
4.48 ± 0.15
11.8 ± 0.8
8.43 ± 1.1
76.17 ± 12
4.92 ± 0.41
2.34 ± 0.43
18
35.4 ± 1.5
4.71 ± 0.15
10.9 ± 0.3
4.71 ± 1.0
40.14 ± 10
—
—
24
36.1 ± 1.3
4.35 ± 0.35
11.7 ± 1.0
5.79 ± 0.4
52.60 ± 2
—
—
0.30–60%
6
52.9 ± 3.8
5.82 ± 0.9
14.3 ± 0.7
3.1 ± 0.4
33.08 ± 5
—
—
9
51.5 ± 3.5
5.86 ± 0.43
15.4 ± 0.5
4.23 ± 0.4
50.50 ± 5
4.69 ± 0.28
2.05 ± 0.17
12
52.2 ± 2.8
5.72 ± 0.49
14.6 ± 1.8
3.57 ± 0.6
40.43 ± 6
4.91 ± 0.27
1.74 ± 0.43
18
51.1 ± 1.6
5.64 ± 0.9
13.1 ± 0.8
2.94 ± 0.6
30.12 ± 6
—
—
24
51.8 ± 3.5
5.45 ± 0.44
13.4 ± 1.0
2.90 ± 0.6
28.09 ± 5
—
—
0.25–60%
6
66.6 ± 3.3
7.16 ± 0.4
14.4 ± 0.3
1.89 ± 0.1
19.39 ± 1.8
—
—
9
64.3 ± 3.2
7.00 ± 0.16
15.3 ± 1.1
2.47 ± 0.3
27.04 ± 4.5
4.74 ± 0.15
1.67 ± 0.25
12
64.3 ± 4.3
6.93 ± 0.73
15.8 ± 0.2
2.47 ± 0.2
28.46 ± 1.5
5.87 ± 0.31
1.05 ± 0.25
18
62.5 ± 2.2
6.50 ± 0.48
15.2 ± 0.5
2.10 ± 0.2
21.36 ± 0.7
—
—
24
62.7 ± 2.8
6.68 ± 0.35
15.2 ± 0.8
2.00 ± 0.3
23.09 ± 2.2
—
—
0.22–60%
6
77.9 ± 5.1
8.37 ± 0.15
13.4 ± 1.0
1.75 ± 0.4
18.08 ± 4
—
—
9
76.2 ± 4.2
9.39 ± 0.5
14 ± 0.4
1.66 ± 0.2
16.73 ± 2.3
6.08 ± 0.4
0.40 ± 0.03
12
75.9 ± 3.7
8.60 ± 1.5
13.8 ± 0.6
2.50 ± 0.3
26.58 ± 3.7
5.67 ± 0.11
0.39 ± 0.08
18
76.9 ± 5.0
8.80 ± 1.4
11.5 ± 0.4
0.98 ± 0.4
7.98 ± 3.6
—
—
24
76.3 ± 4.5
8.92 ± 0.7
12.8 ± 0.9
1.13 ± 0.4
10.67 ± 4.2
—
—
is the compressive strength, is the initial cracking flexural strength, is the ultimate flexural strength, and is the ultimate midspan deflection. is the fiber bridging energy dissipation under four-point bending. is the ultimate tensile strength, and is the ultimate tensile ductility.
