Characteristics of Waste Oil-rejuvenated RAP Bitumen: An Experimental Study

IF 1 Q4 ENGINEERING, CIVIL Jordan Journal of Civil Engineering Pub Date : 2023-07-10 DOI:10.14525/jjce.v17i3.07

Vishal Kumar, P. Aggarwal

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Abstract

In recent years, Reclaimed Asphalt Pavement (RAP) has become very popular in pavement construction due to its benefits to the economy and the environment. The present study investigates the feasibility of employing Waste Cooking Oil (WCO) and Waste Engine Oil (WEO) as rejuvenators blended with reusable asphalt binder through physical and rheological properties at high and intermediate temperatures. Examined conventional properties of WCO-and WEO-modified bitumen include softening point, penetration, ductility and viscosity. In addition to these rheological properties, they also include Amplitude Sweep, Frequency Sweep, Multiple Stress Creep Recovery (MSCR), Linear Amplitude Sweep (LAS) and High-temperature Performance Grading (HTPG) tests carried out by Dynamic Shear Rheometer (DSR). The experimental outcomes revealed that both WCO and WEO could reduce deformation resistance and improve stiffness, workability and viscous behavior of aged bitumen. Moreover, the addition of waste oils improves the fatigue lives of rejuvenated bitumen and enhance fatigue cracking resistance, but at the cost of rutting resistance. Overall, WCO performs better in restoring stiff binder properties than WEO as per rheological testing. KEYWORDS: Dynamic shear rheometer (DSR), Reclaimed asphalt pavement (RAP), Rejuvenators, Waste cooking oil (WCO), Waste engine oil (WEO).

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废油再生RAP沥青特性的试验研究

近年来，再生沥青路面（RAP）因其具有良好的经济效益和环境效益，在路面施工中得到了广泛的应用。本研究通过高温和中等温度下的物理和流变特性，研究了使用废弃食用油（WCO）和废弃机油（WEO）作为再生剂与可重复使用的沥青粘合剂混合的可行性。WCO和WEO改性沥青的常规性能包括软化点、渗透性、延展性和粘度。除了这些流变特性外，它们还包括通过动态剪切流变仪（DSR）进行的振幅扫描、频率扫描、多重应力蠕变恢复（MSCR）、线性振幅扫描（LAS）和高温性能分级（HTPG）测试。试验结果表明，WCO和WEO均能降低老化沥青的变形阻力，改善老化沥青的刚度、工作性和粘性。此外，废油的添加提高了再生沥青的疲劳寿命，提高了抗疲劳开裂性，但代价是抗车辙性。总的来说，根据流变学测试，WCO在恢复硬质粘合剂性能方面比WEO表现得更好。关键词：动态剪切流变仪（DSR），再生沥青路面（RAP），再生剂，废食用油（WCO），废机油（WEO）。

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来源期刊

Jordan Journal of Civil Engineering ENGINEERING, CIVIL-

CiteScore

2.10

自引率

27.30%

发文量

期刊介绍： I am very pleased and honored to be appointed as an Editor-in-Chief of the Jordan Journal of Civil Engineering which enjoys an excellent reputation, both locally and internationally. Since development is the essence of life, I hope to continue developing this distinguished Journal, building on the effort of all the Editors-in-Chief and Editorial Board Members as well as Advisory Boards of the Journal since its establishment about a decade ago. I will do my best to focus on publishing high quality diverse articles and move forward in the indexing issue of the Journal.