[Retracted] Experimental Study on Mineral Solid Waste Green Grouting Material Based on Electromagnetic Characteristic Detection

Table 3

Modified phosphogypsum powder (CaSO4·1/2H2O) properties.

Inspection items		Unit	Index requirements			Experimental data	Single evaluation
			3.0	2.0	1.6
Β-CaSO4·1/2H2O		%	>60.0			68.7	Standard
Fineness (0.2 mm square hole sieve residue)		%	≤10			3	Standard
Setting time	Initial setting time	min	≥3			4	Standard
	Final setting time	min	≤30			8	Standard
2 h flexural strength		Mpa	≥3.0	≥2.0	≥1.6	3.4	Standard
2 h compressive strength		Mpa	≥6.0	≥4.0	≥3.0	7.0	Standard
Radioactivity	IRa	—	≤1.0			—	—
	Ir	—	≤1.0			—	—
Restricting element	K2O	%	Agreed by both parties			0.16	—
	Na2O	%	Agreed by both parties			0.11	—
	MgO	%	Agreed by both parties			0.96	—
	P2O5	%	Agreed by both parties			1.80	—
	F	%	Agreed by both parties			0.10	—