Kamarudin Siti Nur Naqibah, Warid Muhammad Naqiuddin Mohd, Mahmud Mohd Zul Hanif, Yaacob Haryati, Rogo Kabiru Usman, Lazi Mohd Khairul Afzan Mohd
Faculty of Civil Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia.
Department of Civil Engineering Technology, School of Engineering Technology, Nuhu Bamalli Polytechnic Zaria, P.M.B 1061, Zaria, Kaduna State, Nigeria.
Environ Sci Pollut Res Int. 2025 Jan 4. doi: 10.1007/s11356-024-35814-1.
Sustainable pavement is essential for country development, offering durable, environmentally friendly, and cost-effective infrastructure. For Malaysia, sustainable pavement supports Sustainable Development Goals (SDGs) 9 and 11 while addressing road deterioration caused by increasing traffic volumes and loads. This deterioration shortens pavement service life and necessitates frequent maintenance, driving the need for innovative solutions. To enhance pavement sustainability, researchers have explored additives like plastic waste, specifically low-density polyethylene (LDPE), a major component of packaging waste. LDPE improves durability but is prone to fatigue cracking. Addressing this, physical treatments of LDPE can improve its surface topography, compaction properties, and binder-aggregate adhesion, optimizing pavement performance. This study evaluated hot mix asphalt mixtures incorporating untreated plastic (UP) and treated plastic (TP) additives under varied compaction efforts and mixing temperatures. Performance tests, including Marshall stability, resilient modulus, creep, and tensile strength ratio (TSR), were conducted. Results showed that the TP50L mixture (with 25% fewer compaction blows and a mixing temperature reduced by 25 °C) performed better than the UP and control mixtures, demonstrating 30% greater fatigue resistance, 11% higher rutting resistance, and 12% improved moisture damage performance. The superior performance of TP additives is attributed to their rougher surface, enhancing the binder-aggregate bond and aggregate properties. The study concludes that treated plastic additives not only strengthen pavements against permanent deformation but also reduce compaction efforts and mixing temperatures, leading to lower energy use during construction. By incorporating plastic waste into pavements, this approach promotes environmental sustainability, reduces maintenance needs, and supports eco-friendly infrastructure development.
可持续路面对于国家发展至关重要，它提供了耐用、环保且经济高效的基础设施。对于马来西亚而言，可持续路面有助于实现可持续发展目标9和11，同时解决因交通流量和负荷增加而导致的道路恶化问题。这种恶化缩短了路面使用寿命，需要频繁维护，从而催生了对创新解决方案的需求。为了提高路面的可持续性，研究人员探索了诸如塑料废料等添加剂，特别是低密度聚乙烯（LDPE），它是包装废料的主要成分。LDPE可提高耐久性，但容易出现疲劳开裂。针对这一问题，对LDPE进行物理处理可以改善其表面形貌、压实性能以及粘结剂与集料的粘附性，从而优化路面性能。本研究评估了在不同压实力度和搅拌温度下掺入未处理塑料（UP）和处理过的塑料（TP）添加剂的热拌沥青混合料。进行了包括马歇尔稳定性、回弹模量、蠕变和抗拉强度比（TSR）在内的性能测试。结果表明，TP50L混合料（压实击数减少25%，搅拌温度降低25°C）的性能优于UP混合料和对照混合料，其抗疲劳性能提高了30%，抗车辙性能提高了11%，抗水损害性能提高了12%。TP添加剂的卓越性能归因于其更粗糙的表面，增强了粘结剂与集料的粘结以及集料性能。该研究得出结论，处理过的塑料添加剂不仅能增强路面抵抗永久变形的能力，还能减少压实力度和搅拌温度，从而降低施工期间的能源消耗。通过将塑料废料掺入路面，这种方法促进了环境可持续性，减少了维护需求，并支持了生态友好型基础设施的发展。
