Mahdi Teyba Wedajo, Senadheera Sanjaya, Ghebrab Tewodros
Department of Transportation Engineering, Jimma Institute of Technology, Jimma University, Jimma P.O. Box 378, Ethiopia.
Department of Civil, Environmental and Construction Engineering, Texas Tech University, Lubbock, TX 79409, USA.
Materials (Basel). 2022 May 16;15(10):3565. doi: 10.3390/ma15103565.
The performance of asphalt binder reinforced with waste plastic polyethylene terephthalate (PET) was investigated. Penetration, ductility, softening point, and rotational viscosity tests were conducted to check the performance of the PET-reinforced pavement. The rheological properties of the binder were determined using amplitude sweep and frequency sweep tests and performance grade (PG) measurements of aged and unaged specimens. PET size, mix mechanism, and mix temperature significantly influenced the physical properties of the AB and the penetration index (). The size and content of PET had pronounced effects on the and softening point than the blending temperature. Increasing the size of PET particles from 75 to 150 μm and the content from 0% to 10% of the bitumen resulted in the reduction of the penetration and ductility values from 96 to 85 mm and 100 to 78 cm, respectively, whereas the softening point increased from 46 to 56.6 °C. As a result, the value of the binder increased, which indicates that the temperature susceptibility was improved. The addition of 10% PET increased the viscosity of the baseline bitumen by threefold upto a temperature of 135 °C and dropped it by fourfold when the temperature was raised to 165 °C. Increasing the PET from 0% to 10% and the temperature from 21.1 to 54.4 °C increased the critical strain value (LVER) by 96%.
对用废弃聚对苯二甲酸乙二酯（PET）增强的沥青结合料性能进行了研究。进行了针入度、延度、软化点和旋转粘度试验，以检验PET增强路面的性能。使用振幅扫描和频率扫描试验以及对老化和未老化试样的性能等级（PG）测量来确定结合料的流变性能。PET尺寸、混合机理和混合温度对沥青结合料（AB）的物理性能和针入度指数（）有显著影响。PET的尺寸和含量对和软化点的影响比对混合温度的影响更为显著。将PET颗粒尺寸从75μm增加到150μm，其含量从占沥青的0%增加到10%，导致针入度值从96mm降低到85mm，延度值从100cm降低到78cm，而软化点从46℃升高到56.6℃。结果，结合料的值增加，这表明温度敏感性得到改善。添加10%的PET使基准沥青的粘度在温度达到135℃时增加了三倍，而当温度升至165℃时降低了四倍。将PET含量从0%增加到10%，温度从21.1℃升高到54.4℃，临界应变值（LVER）增加了96%。
