Study on Preparation of Coal Gangue-Based Geopolymer Concrete and Mechanical Properties

Table 8

Compressive strength and flexural strength of each specimen cured at 60°C for 7 days.

Numbers	G1	G2	G3	G4	G5	G6	G7	C
Compressive strength (MPa)	68.3	71.1	54.2	59.2	86.5	52.3	45.7	38.8
Flexural strength (MPa)	4.72	4.26	4.19	4.03	5.52	3.94	3.54	3.33