Table 2.
Compressive strength of chosen vinyl-ester composites (ID: No. 3 and No. 7 acc. to Figure 5) with various types of fly ash (FAS, siliceous fly ash; FAF, fly ash from hard coal FBC; FAF2, fly ash from lignite FBC) obtained after 14 days, 7 years, and 9 years or after 14 days and 9.5 years.
| Fly Ash | ID | FA/M, % | FA/PC, kg/kg | Age: 14 Days |
Age: 7 Years |
Age: 9 or 9.5 Years |
Δ7/Δ9/9.5, % | |||
|---|---|---|---|---|---|---|---|---|---|---|
| fc, MPa |
CV, % |
fc, MPa |
CV, % |
fc, MPa |
CV, % |
|||||
| FAS | № 3 | 21 | 5.3 | 94.2 | 3.3 | 103.2 | 0.0 | 120.0 | 3.3 | 9.6/27.4 |
| FAF | 101.0 | 1.2 | 104.4 | 0.5 | 115.3 | 7.1 | 3.4/14.2 | |||
| FAF2 | 104.3 | 8.4 | - | - | 122.4 1 | 1.4 | - /17.4 | |||
| FAS | № 7 | 79 | 20.1 | 96.6 | 3.6 | - | - | 105.0 | 4.7 | - /8.7 |
| FAF | 90.7 | 4.8 | 110.8 | 0.0 | 107.5 | 1.9 | 22.2/18.5 | |||
| FAF2 | 94.0 | 3.5 | - | - | 105.2 1 | 9.7 | - /11.9 | |||
1 Specimens with fly ash from lignite FBC tested after 9.5 years.