Ballester-Ramos Mireia, Miera-Dominguez Helena, Lastra-González Pedro, Castro-Fresno Daniel
BECSA SAU Edificio Simetría, Paseo Buenavista s/n, 12100 El Grao de Castellón, Spain.
GITECO Research Group, Universidad de Cantabria, Avda. de Los Castros s/n, 39005 Santander, Spain.
Materials (Basel). 2023 Jan 19;16(3):948. doi: 10.3390/ma16030948.
In previous studies, different additives and modifiers have been studied to improve the properties of asphalt concrete mixtures, whose main failures are plastic deformation and cracking. In this research, the improvement of the properties of asphalt concrete mixtures were investigated by introducing residual plastics as a substitute for virgin bitumen, which improves the sustainability of the mixtures. Furthermore, the results obtained from these new mixtures were compared with a mixture designed with polymer-modified bitumen (PMB). Ten experimental designs were tested with three types of waste fibre plastics from a municipal solid waste treatment plant and two percentages of bitumen replacement (15% and 25%). The experimental testing plan included air void characterization, moisture sensitivity, stiffness and fatigue resistance, among others. An increase of approximately 5% in voids could be observed when introducing the plastic material and therefore some tests were carried out to over-compact the specimens. The results showed an improvement in the mechanical performance of the experimental mixtures, highlighting the resistance against plastic deformations, which even reached similar values to the mixtures made with PMB.
在先前的研究中，已经对不同的添加剂和改性剂进行了研究，以改善沥青混凝土混合料的性能，其主要失效形式为塑性变形和开裂。在本研究中，通过引入残余塑料替代原生沥青来研究沥青混凝土混合料性能的改善情况，这提高了混合料的可持续性。此外，将这些新混合料的结果与用聚合物改性沥青（PMB）设计的混合料进行了比较。用来自城市固体废物处理厂的三种类型的废弃纤维塑料和两种沥青替代率（15%和25%）进行了十个实验设计测试。实验测试计划包括空隙率表征、水分敏感性、刚度和疲劳抗性等。引入塑料材料时可观察到空隙率增加约5%，因此进行了一些试验以对试件进行过度压实。结果表明，实验混合料的力学性能有所改善，突出了其抗塑性变形能力，甚至达到了与用PMB制成的混合料相似的值。
