Experimental Study on the Concrete with Compound Admixture of Iron Tailings and Slag Powder under Low Cement Clinker System

Table 5

Compressive strength at different ages of concrete (MPa).

Group	3 d	7 d	28 d	Group	3 d	7 d	28 d
A1	19.2	33.3	45.3	B1	32.1	46.2	65.4
A2	15.6	27.8	43.3	B2	34.5	51.9	69.7
A3	15.5	25.5	40.9	B3	34.6	47.1	63.4
A4	13.6	23.3	36.0	B4	33.5	47.5	58.3
A5	12.2	19.2	30.5	B5	31.4	41.2	52.4