Table 1.
Characteristics of raw materials.
| Property | Value | |||||
|---|---|---|---|---|---|---|
| Portland cement CEM I 52.5N | ||||||
| Specific surface area (m2/kg) | 339 | |||||
| Soundness (mm) | 0.5 | |||||
| Fineness, passage through sieve No. 008 (%) | 97.5 | |||||
| Setting times (min): - Start - End |
170 240 |
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| Compressive strength (MPa): - 2 days - 28 days |
25.7 58.5 |
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| Crushed sandstone | ||||||
| Particle size (mm) | 5–20 | |||||
| Bulk density (kg/m3) | 1429 | |||||
| Apparent density (kg/m3) | 2553 | |||||
| Resistance to fragmentation (wt %) | 11.8 | |||||
| Content of lamellar and acicular grains (wt %) | 9.7 | |||||
| Quartz sand | ||||||
| Sieve diameter (mm) | Content (% by weight) of grains with a particle size of less than 0.16 mm | Fineness modulus | ||||
| Partial residues on sieves (%) | ||||||
| Total residues on sieves (%) | ||||||
| 2.5 | 1.25 | 0.63 | 0.315 | 0.16 | ||
| 3.2 | 10.1 | 14.3 | 16.6 | 54.7 | 1.0 | 1.87 |
| 3.2 | 13.3 | 27.6 | 44.2 | 99.0 | ||
| Bulk density (kg/m3) | 1255 | |||||
| The content of dust and clay particles (%) | 0.09 | |||||
| Content of clay in lumps (%) | 0.12 | |||||
| Organic and contaminant content (%) | No | |||||
| Coal dust (CD) | ||||||
| Bulk density (kg/m3) | 345 | |||||
| Loss on ignition (%) | 37.34 | |||||
| Silicon oxide SiO2 (%) | 30.83 | |||||
| Aluminum oxide Al2O3 (%) | 15.74 | |||||
| Iron oxide Fe2O3 total (%) | 6.22 | |||||
| Calcium oxide CaO (%) | 2.92 | |||||
| Magnesium oxide MgO (%) | 3.43 | |||||
| Titanium oxide TiO2 (%) | 0.64 | |||||
| Phosphorus oxide P2O5 (%) | 0.07 | |||||
| Total sulfur oxide SO3 (%) | 2.81 | |||||