Preparation Parameter Analysis and Optimization of Sustainable Asphalt Binder Modified by Waste Rubber and Diatomite

Table 1

Actual and coded values of the independent variables.

Coded value	Actual value
	(%)	(%)	(min)	(rpm)	(°C)	(min)
−1	5	5	30	3000	160	30
0	10	10	45	4500	175	45
+1	15	15	60	6000	190	60