Crack Propagation Phenomenon in Gangue Concrete Using the Digital Image Correlation (DIC) Method

Table 2

Mix proportioning.

Design strength	Water-cement ratio	Water (kg/m^3)	Cement (kg/m^3)	Coarse aggregate (natural crushed stone + coal gangue) (kg/m^3)	Fine aggregate (kg/m^3)	Sand/coarse aggregate ratio (kg/m^3)	Additive (kg/m^3)	Polypropylene fiber (kg/m^3)
C30	0.53	180	337	1041 + 0	852	0.45	1.36	21
M30C30	0.53	180	337	711.9 + 305.1	831	0.45	1.36	21
M50C30	0.53	180	337	497.5 + 497.5	814	0.45	1.36	21
M70C30	0.53	180	337	291.8 + 681.1	796	0.45	1.36	21
M100C30	0.53	180	337	0 + 941	770	0.45	1.36	21