Table 6. Technical performance of the asphalt under different biochar contents.

mass percentage of carbon powder content in asphalt binder/%		0	2	4	6	8	10	12
biochar powder made from straw	Penetration (25°C, 100 g, 5 s)/0.1 mm)	75.2	62.5	56.6	52.4	51.2	49.6	47.5
	Softening point/°C	45.6	47.5	48.5	50.4	51.2	52.4	53.6
	Ductility at 15°C/(cm)	110.4	56.6	32.8	24.5	21.8	18.2	14.6
Commercial charcoal powder	Penetration (25°C, 100 g, 5 s)/0.1 mm)	75.2	63.2	57.6	53.5	51.9	49.2	48.1
	Softening point/°C	45.6	46.9	48.2	49.5	50.8	51.7	52.6
	Ductility at 15°C/(cm)	110.4	57.2	33.5	25.3	22.4	20.1	16.5