Effect of Gamma-Irradiated Recycled Low-Density Polyethylene on the High- and Low-Temperature Properties of Bitumen

Table 5

Creep stiffness and 𝑚-value of the binders at a loading time of 60 s and different temperatures.

Binder types	Creep stiffness (MPa)			m-value			Performance grading (PG)
	−16°C	−22°C	−28°C	−16°C	−22°C	−28°C
B	42.13	99.50	199.05	0.479	0.432	0.309	PG Y-28
B-1-γ-LDPER	40.71	139.69	219.12	0.381	0.343	0.281	PG Y-22
B-3-γ-LDPER	67.61	146.12	228.33	0.325	0.318	0.274	PG Y-22
B-5-γ-LDPER	66.93	156.68	248.98	0.324	0.301	0.285	PG Y-22
B-7-γ-LDPER	78.77	176.58	—	0.311	0.267	—	PG Y-16
B-9-γ-LDPER	79.39	143.8	—	0.310	0.263	—	PG Y-16