Anwar Muhammad Kashif, Shah Syyed Adnan Raheel, Alhazmi Hatem
Department of Civil Engineering, Pakistan Institute of Engineering and Technology, Multan 66000, Pakistan.
National Center for Environmental Technology (NCET), Life Science and Environment Research Institute (LSERI), King Abdulaziz City for Science and Technology (KACST), Riyadh 11442, Saudi Arabia.
Polymers (Basel). 2021 Apr 19;13(8):1330. doi: 10.3390/polym13081330.
Numerous environmental issues arise as a result of a linear economy strategy: reserves become scarce and end up in landfills and as greenhouse gases. Utilizing waste as a resource or shifting towards a circular economy are among the effective strategies for addressing these issues. To track this shift, appropriate measures that concentrate on sustainable development while taking practical contexts into consideration are required. In this paper, we utilize plastic wastes as a replacement for bitumen for reuse aiming at a circular economy. The use of plastic waste materials, i.e., plastic bottles (PET) and gas pipes (PE) in asphalt materials as a bitumen modifier was studied through series of experimental lab test methods. Marshall samples were prepared using a conventional Marshall method containing five different percentages (0%, 5%, 10%, 15%, and 20%) of plastic content by total weight of bitumen. Samples were tested after 1 and 30 days and the result shows that the stability of plastic-modified asphalt concrete was increased after 30 days, while still meeting standard criteria with plastic contents up to 20%. Moreover, the addition of waste plastic in road construction is a very effective strategy for reusing plastic waste, which also provides economic and social benefits for a sustainable approach to road pavements.
资源储备变得稀缺，最终被填埋或排放为温室气体。将废物作为资源利用或转向循环经济是解决这些问题的有效策略之一。为了追踪这一转变，需要采取适当措施，在考虑实际情况的同时专注于可持续发展。在本文中，我们以循环经济为目标，利用塑料废物替代沥青进行再利用。通过一系列实验室试验方法，研究了塑料废料，即塑料瓶（PET）和燃气管道（PE）作为沥青材料中的沥青改性剂的使用情况。采用传统马歇尔方法制备马歇尔试件，其中塑料含量占沥青总重量的五个不同百分比（0%、5%、10%、15%和20%）。试件在1天和30天后进行测试，结果表明，30天后塑料改性沥青混凝土的稳定性有所提高，同时塑料含量高达20%时仍符合标准要求。此外，在道路建设中添加废塑料是一种非常有效的塑料废物再利用策略，这也为可持续的道路路面方法带来了经济和社会效益。
