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

Figure 7

The variation of flexural strength of coal gangue-based polymer concrete with water-binder ratio. (a) Seven-day flexural strength (G1–G3). (b) Seven-days flexural strength (G4–G7). (c) 28-day flexural strength (G1–G3). (d) 28-day flexural strength (G4–G7).

(a)

(b)

(c)

(d)