Preparation of Baking-Free Brick from Manganese Residue and Its Mechanical Properties

Table 4

Compressive strength of bricks under different forming pressures.

Forming pressure (MPa)	Compressive strength (MPa)
	7d	28d
20	10.6	16.3
25	13.5	17.4
30	14.7	21.3
35	15.3	21.7
40	16.2	22.3