Table 5.
Score matrix for calculation of RD values including hole enlargement using Method 2
| Bursting Strength (kPa) | Lowest test value range from lab | Intermediate test value ranges | Highest test value range from lab | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bursting Strength Score | 1 | 2.5 | 5 | 7.5 | 10 | 12.5 | 15 | 17.5 | 20 | 22.5 | 25 | ||||||||||
| Snag Strength (N) | Lowest test value range from lab | Intermediate test value ranges | Highest test value range from lab | ||||||||||||||||||
| Snag Strength Score | 1 | 2.5 | 5 | 7.5 | 10 | 12.5 | 15 | 17.5 | 20 | 22.5 | 25 | ||||||||||
| Abrasion Resistance (rubs) | Lowest test value range from lab | Intermediate test value ranges | Highest test value range from lab | ||||||||||||||||||
| Abrasion Resistance Score | 1 | 3 | 6 | 9 | 13 | 16 | 19 | 22 | 25 | ||||||||||||
| Hole Enlargement (mm) | ≥ 21 mm | 20 − 6 mm | ≤ 5 mm | ||||||||||||||||||
| Hole Enlargement Resistance Score | 10 | 20 | 25 | ||||||||||||||||||
| Secondary Damage | Laddering | Unravelling | Tearing combined with Laddering or Unravelling | ||||||||||||||||||
| Secondary Damage Penalty | 10 | 20 | 30 | ||||||||||||||||||
| Penalty Score | Secondary damage penalty x Hole enlargement resistance score/100 | ||||||||||||||||||||