Study on the Compressive Properties and Factors of Recycled Mixture with High Content of Iron Tailings Sand

Table 3

Technical Indexes of Curing agent.

Apparent density	Specific surface area	Setting time		Strength
		Initial-set time	Final-set time	Compressive strength of 7 days	Rupture strength of 7 days	Compressive strength of 28 days	Rupture strength of 28 days
(g/cm3)	(m3/kg)	min	min	MPa	MPa	MPa	MPa
2.85	350	246	531	31.9	6.7	61.2	8.8