Preparation and Performance Assessment of Asphalt Emulsion Modified by the Fabricated SBS Latex

Table 4

Range analysis on the viscosity, mechanical stability, and zeta potential of SBS latex.

	Factor	A	B	C	D
Viscosity (mPa ⋅ s)	k1	3289.25	1192.75	1363.00	1383.50
	k2	1703.75	1384.50	1427.25	1427.25
	k3	862.75	1653.00	1592.75	1560.75
	k4	280.25	1905.75	1782.50	1764.50
	R	3009.00	713.00	419.5.00	381.00
	Order of factors^∗	A > B > C > D
	Optimization level	—	—	—	—
Mechanical stability %	k1	12.18	7.68	6.45	6.45
	k2	1.83	5.93	6.40	6.93
	k3	4.50	6.28	6.83	6.55
	k4	7.95	6.58	6.78	6.53
	R	10.35	1.75	0.43	0.48
	Order of factors	A > B > D > C
	Optimization level	A2	B2	C2	D1
Zeta potential mV	k1	44.93	47.80	51.18	51.85
	k2	61.90	53.93	52.73	52.98
	k3	58.45	53.93	51.73	51.10
	k4	42.73	52.35	52.38	52.08
	R	19.17	6.13	1.55	1.88
	Order of factors	A > B > D > C
	Optimization level	A2	B2	C2	D2

^∗There is no specific requirement for viscosity (no influence on AE preparation at later stage), so the optimization level is not proposed.