Study on the Interaction between Low-Viscosity High-Permeability Pregrouting Sealing Material and Coal and Its Application

Table 6

Comparison between bending strengths of CPCP and CNMCP.

Mass of the added pulverized coal (g)		100	90	80	70	60	50
Bending strength (MPa)	Coal-polyurethane	2.94	2.13	5.32	3.50	4.34	2.77
	Coal-new material	3.86	3.17	3.31	5.00	6.76	7.25
Percent of enhancement (%)		31.3	48.8	−37.8	42.9	55.8	161