Research Article
NSF (Nylon Synthetic Fiber) Effectiveness in Stabilizing Weak Subgrade Soil: An Experimental Investigation
Table 4
Percentage increase in CBR values due to reinforcement of fibers.
| Fiber length (L (mm)) | Percentage of fiber by dry weight of soil | Fiber diameter = 0.3 mm | Fiber diameter = 0.4 mm | AR = (L/D) | CBR value (%) | % increase in CBR value | Soaked CBR swell (%) | AR = (L/D) | CBR value (%) | % increase in CBR value | Soaked CBR swell (%) |
| | 0 | | 1.80 | — | 8.95 | | 1.80 | — | 8.95 |
| 10 | 0.5 | 33.33 | 5.03 | 179.4 | 8.22 | 25 | 5.21 | 189.4 | 6.19 | 1 | 5.83 | 223.9 | 7.09 | 6.39 | 255.0 | 6.03 | 1.5 | 6.575 | 265.3 | 5.84 | 6.89 | 282.8 | 5.06 | 2.5 | 6.52 | 262.2 | 3.87 | 6.81 | 278.3 | 4.11 |
| | 0 | — | 1.80 | — | 8.95 | | 1.80 | — | 8.95 |
| 20 | 0.5 | 66.67 | 5.45 | 202.8 | 8 | 50 | 6.01 | 233.9 | 6.07 | 1 | 6.2 | 244.4 | 6.13 | 6.87 | 281.7 | 5.66 | 1.5 | 7.38 | 310.0 | 4.23 | 7.96 | 342.2 | 5.65 | 2.5 | 7.3 | 305.6 | 3.87 | | 8.02 | 345.6 | 5.5 |
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Making these values bold is just to see the CBR value of the natural (unreinforced) soil and compare it with other percentages of reinforcement.
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