使用不同类型再生剂评估再生热拌沥青混合料的抗车辙性能

Evaluating Rutting Resistance of Rejuvenated Recycled Hot-Mix Asphalt Mixtures Using Different Types of Recycling Agents.

作者信息

Hashim Tameem Mohammed, Nasr Mohammed Salah, Jebur Yasir Mohammed, Kadhim Abdullah, Alkhafaji Zainab, Baig Mirza Ghouse, Adekunle Saheed Kolawole, Al-Osta Mohammed A, Ahmad Shamsad, Yaseen Zaher Mundher

机构信息

Department of Building and Construction Techniques Engineering, Al-Mustaqbal University College, Hillah 51001, Iraq.

Technical Institute of Babylon, Al-Furat Al-Awsat Technical University (ATU), Najaf 51015, Iraq.

出版信息

Materials (Basel). 2022 Dec 8;15(24):8769. doi: 10.3390/ma15248769.

DOI:10.3390/ma15248769

PMID:36556575

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9788129/

Abstract

Growing environmental pollution worldwide is mostly caused by the accumulation of different types of liquid and solid wastes. Therefore, policies in developed countries seek to support the concept of waste recycling due to its significant impact on the environmental footprint. Hot-mix asphalt mixtures (HMA) with reclaimed asphalt pavement (RAP) have shown great performance under rutting. However, incorporating a high percentage of RAP (>25%) is a challenging issue due to the increased stiffness of the resulting mixture. The stiffness problem is resolved by employing different types of commercial and noncommercial rejuvenators. In this study, three types of noncommercial rejuvenators (waste cooking oil (WCO), waste engine oil (WEO), and date seed oil (DSO)) were used, in addition to one type of commercial rejuvenator. Three percentages of RAP (20%, 40%, and 60%) were utilized. Mixing proportions for the noncommercial additives were set as 0−10% for mixtures with 20% RAP, 12.5−17.5% for mixtures with 40% RAP, and 17.5−20% for mixtures with 60% RAP. In addition, mixing proportions for the commercial additive were set as 0.5−1.0% for mixtures with 20% RAP, 1.0−1.5% for mixtures with 40% RAP, and 1.5−2.0% for mixtures with 60% RAP. The rutting performance of the generated mixtures was indicated first by using the rutting index (G*/sin δ) for the combined binders and then evaluated using the Hamburg wheel-track test. The results showed that the rejuvenated mixtures with the commercial additive at 20 and 60% RAP performed well compared to the control mixture, whereas the rejuvenated ones at 40% RAP performed well with noncommercial additives in comparison to the control mixture. Furthermore, the optimum percentages for each type of the used additives were obtained, depending on their respective performance, as 10%, 12.5%, and 17.5% of WCO, 10%, 12.5−17.5%, and 17.5% of WEO, <10%, 12.5%, and 17.5% of DSO, and 0.5−1.0%, 1.0%, and 1.5−2.0% of the commercial rejuvenator, corresponding to the three adopted percentages of RAP.

摘要

全球范围内日益严重的环境污染主要是由不同类型的液体和固体废弃物的积累造成的。因此，发达国家的政策旨在支持废物回收利用的理念，因为其对环境足迹有重大影响。含有再生沥青路面（RAP）的热拌沥青混合料（HMA）在抗车辙性能方面表现出色。然而，由于所得混合料刚度增加，掺入高比例的RAP（>25%）是一个具有挑战性的问题。通过使用不同类型的商业和非商业再生剂来解决刚度问题。在本研究中，除了一种商业再生剂外，还使用了三种非商业再生剂（废食用油（WCO）、废机油（WEO）和椰枣籽油（DSO））。使用了三种RAP比例（20%、40%和60%）。对于含20%RAP的混合料，非商业添加剂的混合比例设定为0−10%；对于含40%RAP的混合料，为12.5−17.5%；对于含60%RAP的混合料，为17.5−20%。此外，对于含20%RAP的混合料，商业添加剂的混合比例设定为0.5−1.0%；对于含40%RAP的混合料，为1.0−1.5%；对于含60%RAP的混合料，为1.5−2.0%。首先通过使用结合料的车辙指数（G*/sin δ）来表明所生成混合料的车辙性能，然后使用汉堡轮辙试验进行评估。结果表明，与对照混合料相比，含20%和60%RAP且添加商业添加剂的再生混合料表现良好，而含40%RAP且添加非商业添加剂的再生混合料与对照混合料相比表现良好。此外，根据各自的性能，得出了每种所用添加剂的最佳比例，分别为WCO的10%、12.5%和%，WEO的10%、12.5−17.5%和17.5%，DSO的<10%、12.5%和17.5%，以及商业再生剂的0.5−1.0%、1.0%和1.5−2.0%，对应于所采用的三种RAP比例。