Mixture Ratio Design Optimization of Coal Gangue-Based Geopolymer Concrete Based on Modified Gravitational Search Algorithm

Table 7

Cost of different strength grades coal gangue-based geopolymer concrete based on traditional GSA (yuan/m³).

Strength grades	C30	C35	C40	C45	C50
Economic costs	189.37	218.92	238.28	251.31	275.75