Effect of Material Composition on Cohesion Characteristics of Styrene-Butadiene-Styrene-Modified Asphalt Using Surface Free Energy

Table 6

Contact angle and its variation coefficient for the SBS-modified asphalts.

	Distilled water		Glycerol		Formamide
	Average value (°)	Coefficient of variation (%)	Average value (°)	Coefficient of variation (%)	Average value (°)	Coefficient of variation (%)
Binder A	102.6	0.43	92.6	0.36	86.1	0.32
Binder B	100.6	0.48	93.8	0.28	86.9	0.63
Binder C	103.8	0.25	97.8	0.48	92.0	0.47
Binder A + linear SBS	94.0	0.29	89.6	0.39	82.0	0.18
Binder B + linear SBS	96.6	0.44	89.2	0.35	83.0	0.39
Binder C + linear SBS	95.4	0.50	90.6	0.50	84.1	0.29
Binder A + branched SBS	92.4	0.53	87.2	0.17	79.6	0.47
Binder B + branched SBS	95.6	0.35	88.0	0.57	80.9	0.48
Binder C + branched SBS	94.7	0.44	89.6	0.50	82.5	0.57
Binder A + 3.5% SBS	96.2	0.31	89.8	0.38	83.8	0.46
Binder A + 4.0% SBS	94.9	0.35	89.4	0.64	82.9	0.52
Binder A + 4.5% SBS	94.0	0.29	89.6	0.39	82.0	0.18
Binder A + 5.0% SBS	93.6	0.31	86.8	0.39	78.9	0.38
Binder A + 0% extraction oil	96.8	0.25	90.4	0.40	84.3	0.31
Binder A + 2.5% extraction oil	93.3	0.37	88.0	0.52	81.5	0.43
Binder A + 3.5% extraction oil	94.0	0.29	89.6	0.39	82.0	0.18
Binder A + 4.5% extraction oil	93.4	0.33	87.4	0.32	81.0	0.39
Binder A + 0% stabilizer	97.2	0.35	91.0	0.28	85.2	0.17
Binder A + 0.1% stabilizer	95.3	0.45	88.6	0.52	82.5	0.30
Binder A + 0.2% stabilizer	94.0	0.29	89.6	0.39	82.0	0.18
Binder A + 0.3% stabilizer	92.8	0.40	86.1	0.25	78.5	0.52