Table 5 Compressive strength and pozzolanic active strength indexes of Tuff samples.
From: Valorification of Egyptian volcanic tuff as eco-sustainable blended cementitious materials
Sample | Tuff content, % | Compressive strength N/mm2 | Pozzolanic active strength indexes (PASI), % | ||
|---|---|---|---|---|---|
28 days | 90 days | 28 d ≥ 75 | 90 d ≥ 85 | ||
Reference mortar sample | 0 | 52.60 | 65.80 | 100 | 100 |
TF1 | 25 | 43.7 | 52.7 | 83.1 | 80.1 |
TF2 | 25 | 39.0 | 49.0 | 74.1 | 74.5 |
TF3 | 25 | 37.4 | 49.5 | 71.1 | 75.2 |
TF4 | 25 | 35.7 | 48.3 | 67.9 | 73.4 |
TF5 | 25 | 41.6 | 51.9 | 79.1 | 78.9 |
TF6 | 25 | 43.8 | 53.9 | 83.3 | 81.9 |
TF7 | 25 | 44 | 54.3 | 83.7 | 82.5 |
