Lee Sang-Yum, Le Tri Ho Minh
Faculty of Civil Engineering, Induk University, 12 Choansan-ro Nowon-gu, Seoul 01878, Republic of Korea.
Faculty of Civil Engineering, Nguyen Tat Thanh University, 300A Nguyen Tat Thanh Street, District 4, Ho Chi Minh City 70000, Vietnam.
Polymers (Basel). 2023 Aug 3;15(15):3293. doi: 10.3390/polym15153293.
This research addresses the urgent need for sustainable and durable asphalt mixtures by quantitatively investigating the effects of incorporating waste plastic aggregate (WPA) and magnesium-based additives. This study explores WPA content levels of 3%, 5%, and 7% wt of aggregate in combination with a fixed 3% wt epoxy resin content to the asphalt binder, supplemented with the 1.5% wt magnesium-based additive. The novelty of this research lies in its comprehensive analysis of various performance parameters, including deformation strength, indirect tensile strength (ITS), rut depth, and dynamic stability, to assess the impact of WPA, epoxy resin, and the magnesium-based additive on asphalt mixture properties. The results demonstrate significant improvements in key performance aspects with increasing WPA content. The WPA mixtures exhibit enhanced deformation strength, with values of 4.01, 3.7, and 3.32 MPa for 3, 5, and 7% wt WPA content, respectively, compared to the control mixture. Furthermore, the inclusion of WPA and epoxy resin, along with the magnesium-based additive, contributes to improved adhesion, cohesion, and resistance to stripping damage. Notably, the 7% wt WPA mixture showcases exceptional performance, characterized by a final rut depth of 2.66 mm and a dynamic stability of 7519 passes per millimeter, highlighting its superior rutting resistance and load-bearing capacity. This study also reveals the influence of WPA content on ITS and stiffness properties, with the 5% wt WPA mixture achieving an optimal balance between strength and stiffness. Overall, this research highlights the potential of incorporating WPA, epoxy resin, and magnesium-based additives in asphalt mixtures to enhance their performance and durability. By utilizing plastic waste materials and optimizing their combination with epoxy reinforcement, along with the innovative use of magnesium-based additive, the findings contribute to the development of sustainable infrastructure materials and pave the way for further advancements in the field.
本研究通过定量研究掺入废塑料集料（WPA）和镁基添加剂的效果，满足了对可持续和耐用沥青混合料的迫切需求。本研究探索了集料重量的3%、5%和7%的WPA含量水平，并与沥青结合料中固定的3%重量的环氧树脂含量相结合，同时添加1.5%重量的镁基添加剂。本研究的新颖之处在于对各种性能参数进行了全面分析，包括变形强度、间接拉伸强度（ITS）、车辙深度和动稳定度，以评估WPA、环氧树脂和镁基添加剂对沥青混合料性能的影响。结果表明，随着WPA含量的增加，关键性能方面有显著改善。与对照混合料相比，WPA混合料的变形强度有所提高，WPA含量为3%、5%和7%重量时，其值分别为4.01、3.7和3.32MPa。此外，WPA、环氧树脂以及镁基添加剂的加入有助于提高粘结性、内聚力和抗剥落损伤能力。值得注意的是，7%重量的WPA混合料表现出卓越的性能，最终车辙深度为2.66mm，动稳定度为每毫米7519次，突出了其优异的抗车辙性能和承载能力。本研究还揭示了WPA含量对ITS和刚度性能的影响，5%重量的WPA混合料在强度和刚度之间实现了最佳平衡。总体而言，本研究突出了在沥青混合料中掺入WPA、环氧树脂和镁基添加剂以提高其性能和耐久性的潜力。通过利用塑料废料并优化其与环氧增强材料的组合，以及创新性地使用镁基添加剂，这些发现有助于可持续基础设施材料的开发，并为该领域的进一步发展铺平道路。
