Research Article
Effect of Expansive Admixtures on the Shrinkage and Mechanical Properties of High-Performance Fiber-Reinforced Cement Composites
Table 7
Summary of direct tensile test results.
| | EXA (type) | Mixture type | Maximum strength (MPa) |
Tensile strain at peak load (%), (strain at 80% maximum
strength after maximum strength (%)) | | 1 | 2 | 3 | 4 | 5 | Ave. | 1 | 2 | 3 | 4 | 5 | Ave. |
| | None | PE1.5-0 | 6.16 | 6.67 | 5.49 | 5.58 | 4.61 | 5.70 | 3.30
(3.82) | 3.80
(4.32) | 2.16
(2.83) | 2.27
(2.80) | 1.03
(1.55) | 2.51
(3.06) |
| | CSA-K (Type 1) | PE1.5-8 | 2.90 | 3.19 | 6.94 | 4.03 | 5.35 | 4.48 | 0.22
(0.41) | 0.10
(0.33) | —
(−) | 0.40
(0.77) | —
(−) | 0.24
(0.50) | | PE1.5-10 | 4.47 | 6.17 | 7.29 | 5.36 | 6.05 | 5.87 | 2.53
(2.77) | 2.23
(3.08) | 2.30
(2.65) | 1.53
(1.99) | 2.18
(3.19) | 2.16
(2.74) | | PE1.5-12 | 4.41 | 4.85 | 4.58 | 5.81 | 5.81 | 5.09 | 0.53
(0.82) | 1.09
(1.67) | 0.57
(1.27) | 0.97
(1.35) | 1.66
(2.04) | 0.96
(1.43) | | PE1.5-14 | 6.30 | 5.24 | 5.48 | 5.80 | 6.59 | 5.88 | 1.20
(1.28) | 1.86
(2.22) | 1.44
(1.64) | 1.67
(1.83) | —
(−) | 1.54
(1.74) |
| | CSA-J (Type 2) | PE1.5-8 | 4.27 | 6.22 | 5.20 | 4.08 | — | 4.94 | 0.39
(0.54) | 1.53
(2.15) | 0.02
(1.06) | 0.29
(0.91) | — | 0.56
(1.165) | | PE1.5-10 | 6.74 | 4.59 | 3.88 | 5.44 | 5.44 | 5.22 | 2.33
(2.76) | 0.36
(0.86) | 0.82
(1.10) | 0.58
(1.33) | 0.88
(1.43) | 1.00
(1.45) | | PE1.5-12 | 5.23 | 6.48 | 5.72 | 4.86 | 5.62 | 5.58 | 0.4
(1.07) | 2.03
(2.38) | 0.78
(1.32) | 1.33
(2.16) | 1.15
(1.77) | 1.14
(1.74) | | PE1.5-14 | 4.27 | 4.5 | 4.75 | 4.20 | 3.26 | 4.20 | 0.47
(0.90) | 0.91
(1.16) | 0.69
(1.18) | 0.32
(0.63) | —
(−) | 0.60
(0.97) |
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