Research Article
Mechanical Properties of SiO2-Coated Carbon Fiber-Reinforced Mortar Composites with Different Fiber Lengths and Fiber Volume Fractions
Table 5
Results of strength tests with different fiber lengths and fiber volume fractions.
| Type of mortar | Fiber volume fractions (%, in vol) | Fiber lengths (mm) | Mortar strength (MPa) | | | |
| SiO2-coated carbon fiber (CFRM) | 0.5 | 6 | 31.4 | 3.6 | 8.7 | 12 | 30.4 | 3.7 | 8.2 | 1.0 | 6 | 30.5 | 4.3 | 7.1 | 12 | 30.0 | 4.6 | 6.5 | 1.5 | 6 | 27.1 | 4.5 | 6.0 | 12 | 27.3 | 4.9 | 5.6 | 2.0 | 6 | 21.6 | 4.1 | 5.3 | 12 | 23.6 | 4.3 | 5.5 |
| Uncoated carbon fiber (CFRM) | 0.5 | 6 | 29.6 | 3.2 | 9.3 | 12 | 28.6 | 3.4 | 8.4 | 1.0 | 6 | 28.5 | 3.9 | 7.3 | 12 | 28.0 | 4.2 | 6.7 | 1.5 | 6 | 25.3 | 4.1 | 6.2 | 12 | 24.8 | 4.5 | 5.5 | 2.0 | 6 | 19.7 | 3.7 | 5.3 | 12 | 20.7 | 3.9 | 5.2 |
| Plain mortar | ā | ā | 30.6 | 3.1 | 9.9 |
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is the average of the compressive strength measured at 28 days, and is the average of the flexural strength measured at 28 days. |