Table 3.

Test program (L₁₆ orthogonal array).

Test No.	Factors
	A	B	C	D	E
	Cement (kg/m3)	CDG (kg/m3)	Water-Material Ratio	Fine Content	Gravel Content
1	1 (200)	1 (400)	1 (0.35)	1 (0%)	1 (10%)
2		2 (500)	2 (0.40)	2 (15%)	2 (20%)
3		3 (600)	3 (0.45)	3 (30%)	3 (30%)
4		4 (700)	4 (0.50)	4 (45%)	4 (40%)
5	2 (250)	1 (400)	2 (0.40)	3 (30%)	4 (40%)
6		2 (500)	1 (0.35)	4 (45%)	3 (30%)
7		3 (600)	4 (0.50)	1 (0%)	2 (20%)
8		4 (700)	3 (0.45)	2 (15%)	1 (10%)
9	3 (300)	1 (400)	3 (0.45)	4 (45%)	2 (20%)
10		2 (500)	4 (0.50)	3 (30%)	1 (10%)
11		3 (600)	1 (0.35)	2 (15%)	4 (40%)
12		4 (700)	2 (0.40)	1 (0%)	3 (30%)
13	4 (350)	1 (400)	4 (0.50)	2 (15%)	3 (30%)
14		2 (500)	3 (0.45)	1 (0%)	4 (40%)
15		3 (600)	2 (0.40)	4 (45%)	1 (10%)
16		4 (700)	1 (0.35)	3 (30%)	2 (20%)