Optimization of Concrete Containing Polyethylene Terephthalate Powder and Rice Husk Ash Using Response Surface Methodology

Table 5

Summary of ANOVA results of responses.

Response	Slump (mm)	Compressive strength (N/mm^2)	Flexural strength (N/mm^2)
R ^2	0.9657	0.9719	0.9530
Adjusted R^2	0.9085	0.9252	0.8746
SD	1.50	0.8553	0.1643
Mean	46.22	18.44	2.03
CV (%)	3.25	4.64	8.10
Adequate precision	10.8643	12.649	9.9643