Remisova Eva, Briliak Dusan, Holy Michal
Department of Highway and Environmental Engineering, Faculty of Civil Engineering, University of Zilina, Univerzitna 8215/1, 010 01 Zilina, Slovakia.
Zilina City Office, Namestie obeti komunizmu 1, 011 31 Zilina, Slovakia.
Materials (Basel). 2023 Feb 7;16(4):1379. doi: 10.3390/ma16041379.
The quality of bitumen is standardized by conventional tests. With the development of new techniques, rotational and oscillatory measuring systems are applied to evaluate bitumen under defined geometric, temperature, frequency, stress, and strain conditions that correspond to loads during asphalt production and service. Several studies have focused on determining the effect of composition on bitumen properties at service temperatures. However, there is a lack of information related to the effect of composition on viscosity at higher temperatures, which influences production processes. The different types of bitumen, samples of 50/70, 35/50, 45/80-75, and 25/55-60 bitumen, had different viscosity values in intervals corresponding to a confidence level of 95%. The viscosity-temperature relationship in temperature range of 120 to 180 °C was observed in values of 3.87 and 3.70 for unmodified bitumen and 3.09 and 3.22 for modified bitumen. The effect of differences in SARA fractions content on the variation in viscosity using regression analysis showed the importance of asphaltenes (direct correlation) and aromates (negative correlation) contents for 50/70 bitumen with a coefficient of linear regression above 0.7. In comparison, the strong effect of saturates and asphaltenes (negative correlation) and resins was identified for 45/80-75 bitumen samples with correlation of 0.5 to 0.7.
沥青的质量通过传统测试进行标准化。随着新技术的发展，旋转和振荡测量系统被应用于在与沥青生产和使用过程中的荷载相对应的特定几何、温度、频率、应力和应变条件下评估沥青。几项研究集中于确定在使用温度下成分对沥青性能的影响。然而，缺乏关于在较高温度下成分对粘度影响的信息，而这会影响生产过程。不同类型的沥青，即50/70、35/50、45/80 - 75和25/55 - 60沥青样品，在对应95%置信水平的区间内具有不同的粘度值。在120至180°C温度范围内，未改性沥青的粘度 - 温度关系值为3.87和3.70，改性沥青为3.09和3.22。使用回归分析研究SARA组分含量差异对粘度变化的影响表明，对于50/70沥青，沥青质（正相关）和芳烃（负相关）含量很重要，线性回归系数高于0.7。相比之下，对于45/80 - 75沥青样品，确定了饱和烃、沥青质（负相关）和树脂的强烈影响，相关性为0.5至0.7。
