Hierarchical Order of Influence of Mix Variables Affecting Compressive Strength of Sustainable Concrete Containing Fly Ash, Copper Slag, Silica Fume, and Fibres

Table 4

Experimental results from the references (Poon 2009, [2, 13]).

Reference	% of FA	28-day compressive strength, N/mm^2	Ratio	w/b
[8]	Control mix	37.2	—	0.41
	40	26.7	1.00	0.40
	45	24.7	1.08	0.41
	50	23.1	1.16	0.40
	Control mix	97.4	—	0.24
	25	105.9	0.92	0.24
[6]	45	89.4	1.09	0.24
	Control mix	96.8	—	0.19
	25	102.3	0.95	0.19
	45	88.5	1.09	0.19
	Control mix	86.8	—	0.30
	15	86.0	1.01	0.30
	25	85.4	1.02	0.30
	45	71.8	1.21	0.30
[9]	55	57.4	1.51	0.30
	Control concrete	50.8	—	0.50
	15	48.9	1.04	0.50
	25	41.7	1.22	0.50
	45	35.6	1.43	0.50
	55	24.0	2.12	0.50

Ratio = Compressive strength of control mix/compressive strength of fly ash concrete.