Study on Mechanical Properties of Recycled Mixture with High Content of Iron Tailings Sand

Table 4

Technical indexes of special cementitious material.

Apparent density (g/cm^3)	Specific surface area (m^2/kg)	Setting time (min)		Strength of 7 d (MPa)		Strength of 28 d (MPa)
		Initial set	Final set	Compressive strength	Rupture strength	Compressive strength	Rupture strength
2.85	350	246	531	31.9	6.7	61.2	8.8