Experimental Study and Application of a Novel Foamed Concrete to Yield Airtight Walls in Coal Mines

Table 2

Comparison of target density and actual density.

Number	Target density (kg/m^3)	Actual mass (g)			Volume (mm^3)	Actual density (kg/m^3)
		Specimen 1	Specimen 2	Specimen 3
1	250	50.17	49.02	48.53	194877.8	252.7
2	450	89.90	86.67	88.41	195461.9	451.9
3	650	129.14	125.97	123.13	195267.2	645.7
4	850	167.56	166.02	171.81	195072.5	863.5