Table 2 Sample codes for GS1.

From: Estimation of re-refined engine oil bottom content in bitumen and its chemo-rheological effects as an additive and rejuvenator

Sample code

Description

Neat

60/70 neat bitumen

R1

REOB No. 1 from source 1

R2

REOB No. 2 from source 2

R3

REOB No. 3 from source 3

N-5R1

Neat + 5 wt% R1

N-5R2

Neat + 5 wt% R2

N-5R3

Neat + 5 wt% R3

N-7R1

Neat + 7 wt% R1

N-7R2

Neat + 7 wt% R2

N-7R3

Neat + 7 wt% R3

N-9R1

Neat + 9 wt% R1

N-9R2

Neat + 9 wt% R2

N-9R3

Neat + 9 wt% R3

A(Neat)

Neat sample after short- and long-term aging

A(N-9R1)

N-9R1 sample after short- and long-term aging

A(N-9R2)

N-9R2 sample after short- and long-term aging

A(N-9R3)

N-9R3 sample after short- and long-term aging