| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 6480846 | Construction and Building Materials | 2016 | 7 Pages |
â¢REOB can improve the AASHTO M320 grade span at reduced cost to producers.â¢REOB decreases ductile failure properties which makes binders prone to failure.â¢SB polymers improve strain tolerance and thus improve cracking performance.â¢REOB addition to SB-modified binders significantly deteriorates performance.â¢RAP addition to SB/REOB-modified binders further worsens cracking performance.
This paper presents a study on the effects of recycled engine oil bottoms (REOB) on ductile failure properties of asphalt cements. Binders were tested according to regular AASHTO M320 as well as double-edge-notched tension (DENT) test protocols. The DENT test determines essential work of failure (we, a measure of strength and toughness) and critical crack tip opening displacement (CTOD, a measure of strain tolerance). REOB was found to increase the AASHTO M320 grade span but worsen we and/or CTOD. Straight and polymer-modified binders were studied, with and without REOB and reclaimed asphalt pavement (RAP) binder, and significant decreases in we and CTOD were found, pointing to reduced cracking performance.
