Research Article
Effects of Heating Rate on the Dynamic Tensile Mechanical Properties of Coal Sandstone during Thermal Treatment
Table 4
Main components of sandstone.
| Substance
(chemical composition) | Heating rates/(°C/min) | | Room temperature | 5 | 10 | 20 | 30 | 40 | 50 |
| | Quartz (SiO2) (%) | 10.80 | 4.00 | 4.20 | 3.20 | 1.80 | 11.50 | 7.50 | | Kaolinite (Al2Si2O5(OH)4) (%) | 11.60 | 0 | 0 | 0 | 0 | 0 | 0 | | Microcline (KAlSi3O8) (%) | 4.50 | 2.70 | 5.10 | 3.30 | 3.70 | 6.50 | 29.70 | | Anorthite (CaAl2Si2O8) (%) | 73.00 | 93.30 | 90.70 | 93.50 | 94.50 | 80.10 | 60.90 | | Calcium carbonate (CaCO3) (%) | 0 | 0 | 0 | 0 | 0 | 1.90 | 1.90 |
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