Table 3 Number of sliding tests (of 5 in total in each case) where failure occurred through sliding within the tephra rather than at the base of the deposit. For all other tests, sliding occurred between the tephra and the roofing material
From: Laboratory tests to understand tephra sliding behaviour on roofs
Test | Tephra thickness | |
|---|---|---|
20 cm | 30 cm | |
Dry-dry | Ash: 2 on tile | Pumice: 1 on fibre cement Ash: 5 on tile |
Dry-wet | Ash: 3 on tile | Ash: 5 on tile |
Wet-wet | Pumice: 3 on fibre cement; 4 on tile Scoria: 1 on fibre cement; 5 on tile Ash: 2 on fibre cement; 1 on tile | |