Effect of Recycled Rubber on the Properties of Road Bitumen

Table 1

Bitumen modification at 190°C.

Sample no.	Modifiers (%)				Modification time (h)	Residue after devulcanization (%)
	Rubber 0.4	Rubber 0.8	PB solution	Sulfur donor
1	10	—	3	0.07	2	7.2
2	10	—	3	0.07	4	5.9
3	—	10	3	0.07	8	6.1
4	10	—	3	0.07	16	4.5
5	—	—	3	0.07	2	1.8
6	—	—	10	0.07	2	2.6