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

Table 5

Comparison between compressive strengths of CPCP and CNMCP.

Mass of the added pulverized coal (g)		100	90	80	70	60	50
Compressive strength (MPa)	Coal-polyurethane	2.65	3.01	1.94	4.64	3.73	2.92
	Coal-new material	4.36	4.50	4.90	6.38	6.81	7.14
Percent of enhancement (%)		64.5	49.5	153	37.5	82.5	145