Improvement of Engineering Properties of Asphalt Binder and Mixture by Using SBS Additive Material

Table 2

Aggregate test results.

Type of materials	Test	Symbol	Value	Note	Superpave specifications
Gravel	Apparent specific gravity	GA	2.725	Crushed gravel
	Bulk specific gravity	GB	2.671
	Effective specific gravity	GE	2.693
	Water absorption	W.a %	0.747
	Abrasions value	A.V %	22.56
	Gravel angularity	P %	96.6	20% round edge, 80% sharp edge, and all rough surface	95/90%
	Flat and elongated	P %	0.4		max. 10%
Sand	Apparent specific gravity	GA	2.699	Crushed sand
	Bulk specific gravity	GB	2.535
	Effective specific gravity	GE	2.617
	Water absorption	W.a %	2.399
	Uncompacted air void %	U %	48		min. 45
	Sand equivalent value %	Nil	75		min. 45
Filler	Apparent specific gravity	GA	2.523	Brown filler
	Bulk specific gravity	GB	2.435
	Effective specific gravity	GE	2.479
	Water absorption	W.a %	1.422