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

Table 6

Compressive strength and flexural strength of each specimen cured for 7 days at room temperature.

Numbers	G1	G2	G3	G4	G5	G6	G7	C
Compressive strength (MPa)	59.4	52.7	46.3	45.1	64.3	44.8	39.4	35.3
Flexural strength (MPa)	4.23	3.96	3.78	3.62	4.79	3.46	3.15	2.88