Research Article
Experimental Investigation on Mechanical Properties of Hybrid Steel and Polyethylene Fiber-Reinforced No-Slump High-Strength Concrete
Table 5
Test results of compressive and flexural strength.
| | Compressive strength | Flexural strength | 7 days (MPa) | 28 days (MPa) | 28 days (MPa) | Toughness index | Mean | COV | Test results | Mean | COV | Test results | Mean | COV | Test results | | | |
| U16.4-NF | 90.9 | 4.0% | 92.9 | 85.9 | 94.1 | 120.9 | 4.3% | 126.8 | 114.3 | 121.5 | 6.0 | 29.0% | 8.3 | 5.6 | 4.1 | — | — | — | U16.8-NF | 89.1 | 2.3% | 90.9 | 86.2 | 90.2 | 109.1 | 2.3% | 109.2 | 105.9 | 112.1 | 3.6 | 18.6% | 4.3 | 3.7 | 2.7 | — | — | — | U17.2-NF | 91.9 | 0.6% | 92.1 | 91.2 | 92.4 | 122.0 | 1.8% | 125.0 | 119.7 | 121.3 | 5.7 | 15.7% | 5.3 | 4.9 | 6.9 | — | — | — | U16.4-18PE1.5 | 80.9 | 4.7% | 80.3 | 76.6 | 85.7 | 121.9 | 4.5% | 120.1 | 129.4 | 116.2 | 15.3 | 4.0% | 15.8 | 15.5 | 14.4 | 4.9 | 11.0 | 43.3 | U16.8-18PE1.5 | 79.0 | 4.2% | 83.3 | 75.2 | 78.5 | 120.8 | 3.1% | 125.0 | 116.0 | 121.4 | 15.2 | 15.4% | 18.2 | 14.7 | 12.6 | 5.2 | 11.2 | 41.9 | U17.2-18PE1.5 | 81.0 | 1.5% | 82.3 | 81.3 | 79.4 | 124.9 | 0.1% | 125.0 | 124.7 | 125.0 | 23.1 | 19.3% | 23.1 | 28.6 | 17.7 | 5.3 | 12.2 | 62.2 | U16.4-PP1.5 | 81.2 | 1.7% | 80.9 | 79.7 | 83.1 | 116.2 | 3.1% | 118.9 | 111.1 | 118.4 | 19.6 | 17.0% | 13.4 | 20.5 | 16.8 | 4.9 | 10.4 | 32.4 | U17.2-PP1.5 | 81.9 | 1.6% | 80.2 | 83.3 | 82.1 | 117.3 | 1.6% | 119.5 | 117.2 | 115.0 | 22.1 | 11.6% | 19.2 | 24.3 | 22.8 | 5.5 | 11.8 | 48.4 | U16.4-12SP0.5 | 86.0 | 3.9% | 82.5 | 85.0 | 90.6 | 123.2 | 0.7% | 122.9 | 124.5 | 122.3 | 19.0 | 8.6% | 20.3 | 28.1 | 19.5 | 5.5 | 17.1 | 71.1 | U17.2-12SP0.5 | 86.3 | 5.0% | 82.6 | 92.3 | 84.0 | 123.4 | 0.3% | 123.9 | 123.1 | 123.1 | 21.9 | 8.5% | 24.1 | 19.6 | 22.1 | 5.4 | 12.2 | 58.8 | U16.4-18SP1.0 | 85.9 | 1.5% | 80.9 | 79.7 | 83.1 | 123.3 | 0.7% | 122.0 | 123.9 | 123.9 | 14.7 | 5.1% | 13.9 | 14.3 | 15.8 | 4.8 | 11.2 | 51.5 | U17.2-18SP1.0 | 86.0 | 1.6% | 80.2 | 83.3 | 82.1 | 122.9 | 3.5% | 128.4 | 122.2 | 118.1 | 18.5 | 10.5% | 21.0 | 18.3 | 16.3 | 5.3 | 15.7 | 59.3 |
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Note: mean = mean value of test strength; COV = coefficient of variation.
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