Experimental Study on Mechanical Properties of Polypropylene: Steel Fiber Concrete and Loading Characteristics of Shaft Lining

Table 1

Main properties of the P.O52.5R cement used in this study.

Chemical compositions of items	CaO	SiO2	Al2O3	Fe2O3	MgO	SO3	CL^−	Loss on ignition
	56.77%	20.86%	5.90%	3.61%	3.50%	2.43%	0.021%	1.16%
Physical properties property value	Specific surface area		Initial setting	Final setting	3d compressive strength	28d compressive strength	3d flexural strength	28d flexural strength
	381 m^2/kg		115 min	184 min	33.8 MPa	58.6 MPa	6.2 MPa	10.7 MPa