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. 2021 Sep 16;11:18447. doi: 10.1038/s41598-021-98049-x

Table 5.

Main raw material parameters for simulated coal walls.

Coal (particle size) Ordinary silicate cement
Fine aggregates Coarse aggregates Strength grade Extra coefficient
 ≤ 5 mm 5–50 mm 32.5 MPa 1.05 [–]