Experimental Study on Dynamic Mechanical Properties of Coal Gangue Concrete

Table 5

Compressive strength of concrete after conversion.

Group	Numbering	Compressive strength (MPa)					Compressive strength growth rate
		3 days	7 days	28 days	60 days	90 days	3–7 days	7–28 days	28–60 days	60–90 days
C30	NAC	26.45	31.50	39.94	43.42	46.42	0.191	0.268	0.087	0.069
	N-SFC	24.34	31.08	44.67	49.10	52.94	0.277	0.437	0.099	0.078
	N-SAC	23.30	31.12	39.07	42.47	43.91	0.336	0.255	0.087	0.034
	N-SC	22.39	31.35	41.83	45.67	47.43	0.400	0.334	0.092	0.039
C40	NAC	36.14	41.87	48.62	53.04	55.92	0.159	0.161	0.091	0.053
	N-SFC	31.29	40.32	54.42	59.42	60.96	0.289	0.35	0.092	0.053
	N-SAC	29.46	41.74	47.34	50.11	52.50	0.417	0.134	0.059	0.034
	N-SC	27.89	42.00	49.79	53.65	55.69	0.506	0.185	0.078	0.038