In comparison with A600, A700 product has lower impurities level, stable hardening properties and rapid strength development, it is recommended mainly to be used in low cement castables.
| Item/Grade | CA50 | ||||
|---|---|---|---|---|---|
| A600 | A700 | A900 | |||
| Chemical Composition | ω (SiO2) ≤/% | 7.8 | 7.5 | 5.5 | |
| ω (Al2O3)/% | 50.0 | 51.0 | 53.5 | ||
| ω (Fe2O3) ≤/% | 2.5 | 2.5 | 2.5 | ||
| ω (CaO)/% | / | / | / | ||
| ω (MgO) ≤/% | / | / | / | ||
| ω (R2O) ≤/% | 0.4 | 0.4 | 0.4 | ||
| ω (S) ≤/% | 0.1 | 0.1 | 0.1 | ||
| ω (Cl) ≤/% | 0.1 | 0.1 | 0.1 | ||
| Fineness | d50/μm | / | / | / | |
| -45μm ≤/% | / | / | / | ||
| Setting Time | Initial Setting Time (min) | ≥45 | ≥60 | ≥90 | |
| Final Setting Time (min) | ≤360 | ≤360 | ≤360 | ||
| Strength (ISO) | Flexural Strength/Mpa | 24h | 6.0 | 6.5 | 8.0 |
| 72h | 7.0 | 7.5 | 10.0 | ||
| Compressive Strength/Mpa | 24h | 45 | 55 | 72 | |
| 72h | 55 | 65 | 82 | ||
| 325M ≤/% | 15 | 12 | 8 | ||
| Specific Surface Areas ≥/ (㎡/kg) | 300 | 320 | 350 | ||