Investigation of Waste Electrical Power Plant Oil as a Rejuvenating Agent for Reclaimed Asphalt Binders and Mixtures

One of the main difficulties with employing recycled asphalt pavement (RAP) in hot mix asphalt (HMA) is bitumen aging; hence, the percentage of RAP in the HMA is limited. This research evaluates the rheological properties of the RAP binder and the performance of HMA containing high RAP content using...

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Main Authors: Eman M. El-labbad, Usama Heneash, Sherif M. El-Badawy
Format: Article
Language:English
Published: MDPI AG 2022-07-01
Series:Materials
Subjects:
Online Access:https://www.mdpi.com/1996-1944/15/14/4811
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author Eman M. El-labbad
Usama Heneash
Sherif M. El-Badawy
author_facet Eman M. El-labbad
Usama Heneash
Sherif M. El-Badawy
author_sort Eman M. El-labbad
collection DOAJ
description One of the main difficulties with employing recycled asphalt pavement (RAP) in hot mix asphalt (HMA) is bitumen aging; hence, the percentage of RAP in the HMA is limited. This research evaluates the rheological properties of the RAP binder and the performance of HMA containing high RAP content using waste engine oil (WEO) from an Electrical Power Plant as a rejuvenator. The rheological and microstructural properties of the RAP binder and rejuvenated RAP binder were determined in the laboratory. Both the recycled and rejuvenated recycled mixes were tested for Marshall stability, indirect tensile strength, dynamic modulus (E*), and flow number tests. The RAP binder was recovered using two different processes: rotavapor distillation followed by centrifugation (RCRD) and column distillation without centrifugation (RNCCD). The optimal WEO percentages for the RCRD and RNCCD recovery procedures were 0.5% and 3%, respectively. The Marshall test results revealed that adding WEO to the recycled mix enhanced its stability and flow compared to the control mix. The rejuvenated mix containing recovered binder from the RCRD recovery process was found to be better than the rejuvenated mix containing recovered binder from the RNCCD recovery process. The rejuvenated recycled mixes outperformed the recycled mix in terms of moisture resistance, which was evidenced by tensile strength ratio values of 0.88, 0.90, and 0.91 for the control and 0.5% and 3% WEO modified mixes, respectively. Finally, the results of dynamic modulus and flow number testing revealed that the rejuvenated mixes had a modest drop in both the dynamic modulus and flow number compared to the non-rejuvenated mix.
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spelling doaj.art-97e2f15eb473416ab4280202d9d10dcd2023-12-01T22:22:47ZengMDPI AGMaterials1996-19442022-07-011514481110.3390/ma15144811Investigation of Waste Electrical Power Plant Oil as a Rejuvenating Agent for Reclaimed Asphalt Binders and MixturesEman M. El-labbad0Usama Heneash1Sherif M. El-Badawy2Civil Engineering Department, Faculty of Engineering, KafrEl Sheikh University, Kafr El Sheikh 33516, EgyptCivil Engineering Department, Faculty of Engineering, KafrEl Sheikh University, Kafr El Sheikh 33516, EgyptHighway and Airport Engineering Laboratory, Public Works Engineering Department, Faculty of Engineering, Mansoura University, 60 Elgomhoria St., Mansoura 35516, EgyptOne of the main difficulties with employing recycled asphalt pavement (RAP) in hot mix asphalt (HMA) is bitumen aging; hence, the percentage of RAP in the HMA is limited. This research evaluates the rheological properties of the RAP binder and the performance of HMA containing high RAP content using waste engine oil (WEO) from an Electrical Power Plant as a rejuvenator. The rheological and microstructural properties of the RAP binder and rejuvenated RAP binder were determined in the laboratory. Both the recycled and rejuvenated recycled mixes were tested for Marshall stability, indirect tensile strength, dynamic modulus (E*), and flow number tests. The RAP binder was recovered using two different processes: rotavapor distillation followed by centrifugation (RCRD) and column distillation without centrifugation (RNCCD). The optimal WEO percentages for the RCRD and RNCCD recovery procedures were 0.5% and 3%, respectively. The Marshall test results revealed that adding WEO to the recycled mix enhanced its stability and flow compared to the control mix. The rejuvenated mix containing recovered binder from the RCRD recovery process was found to be better than the rejuvenated mix containing recovered binder from the RNCCD recovery process. The rejuvenated recycled mixes outperformed the recycled mix in terms of moisture resistance, which was evidenced by tensile strength ratio values of 0.88, 0.90, and 0.91 for the control and 0.5% and 3% WEO modified mixes, respectively. Finally, the results of dynamic modulus and flow number testing revealed that the rejuvenated mixes had a modest drop in both the dynamic modulus and flow number compared to the non-rejuvenated mix.https://www.mdpi.com/1996-1944/15/14/4811RAPWEOmaster curveFTIRdynamic modulusflow number
spellingShingle Eman M. El-labbad
Usama Heneash
Sherif M. El-Badawy
Investigation of Waste Electrical Power Plant Oil as a Rejuvenating Agent for Reclaimed Asphalt Binders and Mixtures
Materials
RAP
WEO
master curve
FTIR
dynamic modulus
flow number
title Investigation of Waste Electrical Power Plant Oil as a Rejuvenating Agent for Reclaimed Asphalt Binders and Mixtures
title_full Investigation of Waste Electrical Power Plant Oil as a Rejuvenating Agent for Reclaimed Asphalt Binders and Mixtures
title_fullStr Investigation of Waste Electrical Power Plant Oil as a Rejuvenating Agent for Reclaimed Asphalt Binders and Mixtures
title_full_unstemmed Investigation of Waste Electrical Power Plant Oil as a Rejuvenating Agent for Reclaimed Asphalt Binders and Mixtures
title_short Investigation of Waste Electrical Power Plant Oil as a Rejuvenating Agent for Reclaimed Asphalt Binders and Mixtures
title_sort investigation of waste electrical power plant oil as a rejuvenating agent for reclaimed asphalt binders and mixtures
topic RAP
WEO
master curve
FTIR
dynamic modulus
flow number
url https://www.mdpi.com/1996-1944/15/14/4811
work_keys_str_mv AT emanmellabbad investigationofwasteelectricalpowerplantoilasarejuvenatingagentforreclaimedasphaltbindersandmixtures
AT usamaheneash investigationofwasteelectricalpowerplantoilasarejuvenatingagentforreclaimedasphaltbindersandmixtures
AT sherifmelbadawy investigationofwasteelectricalpowerplantoilasarejuvenatingagentforreclaimedasphaltbindersandmixtures