Response Surfaces for Fresh and Hardened Properties of Concrete with E-Waste (HIPS)

Table 3

Factor combinations as per the face-centred central composite response surface design.

Run	Coded factor levels		Actual factors		Space type
			HIPS (Vol %)	ratio
1			10	0.45	Factorial
2			10	0.49	Axial
3			10	0.53	Factorial
4			30	0.45	Axial
5			30	0.49	Center
6			30	0.53	Axial
7			50	0.45	Factorial
8			50	0.49	Axial
9	1	1	50	0.53	Factorial
10	0	0	30	0.49	Center
11	0	0	30	0.49	Center
12	0	0	30	0.49	Center
13	0	0	30	0.49	Center