Mechanism on Activation of Coal Gangue Admixture

Table 1

Physical and mechanical performance of cement.

Cement	Specific surface area (m^2·kg^−1)	Setting time (min)		Stability	Loss on ignition (%)	3 d compressive strength (MPa)	28 d compressive strength (MPa)
		Initial setting	Final setting
P.O42.5	369	220	260	Qualified	3.22	26.4	43.0