1.河北工业大学 土木与交通学院，天津300401;2.长安大学 道路结构与材料交通运输 行业重点实验室，西安710064
李宁利（1977—），女，副教授，主要从事绿色环保型沥青材料的研究与开发，（E-mail）lnl808@hebut.edu.cn。
栗培龙，男，教授，（E-mail） lipeilong@chd.edu.cn。
U414
长安大学重点科研平台开放基金项目（300102210510）。
1.School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, P. R. China;2.Key Laboratory of Highway Structure and Materials, Chang’an University, Xi’an 710064, P. R. China
Supported by the Open Fund Project of Key Scientific Research Pratform of Chang’an University(30010220510).
为了提升生物沥青与集料的黏附性能、提高生物沥青在工程中的实际应用效果，采用硅藻土对生物沥青进行改性研究。通过三大指标试验和布氏旋转黏度试验对硅藻土改性生物沥青的物理性能进行评价；采用改进水煮法评价硅藻土改性生物沥青与石灰岩的黏附性；基于表面自由能理论，通过躺滴法测定硅藻土改性生物沥青与测试液体的接触角，计算表面能、黏聚功、黏附功与剥落功。结果表明，硅藻土能够改善生物沥青的物理性能，提高软化点并降低了针入度，延度先降低后略微提升；黏度随着硅藻土掺量的增加而增大，但掺量超过17%后，黏度几乎不再增大；水煮试验中的沥青质量损失率在硅藻土掺量为17%时达到最小，与原生物沥青相比下降了36.44%；硅藻土能有效提升生物沥青的表面能、黏附功与黏聚功并降低剥落功；无量纲能量参数(ER)在硅藻土掺量为17%时达到最大。
To enhance the adhesion of bio-asphalt to aggregates and improve its practical application in engineering, this study investigates the effects of diatomite modification on bio-asphalt. The physical properties of diatomite-modified bio-asphalt are evaluated using standard index tests and rotational viscosity experiments. Adhesion to limestone is evaluated using an improved boiling method, Based on surface free energy, contact angles between the diatomite-modified bio-asphalt and test liquids are measured by the lying drop method, enabling the calculation of surface energy, cohesion work, adhesion work and spalling work. The results show that diatomite improves the physical properties of bio-asphalt, increases the softening point, reducces needle penetration, initially decreases ductility, and then slightly increases. Viscosity increases with diatomite content but stabilizes when the content exceeds 17%. When diatomite content is 17%, the asphalt quality loss during the boiling test is minimized, showing a decrease of 36.44% compared with unmodified bio-asphalt. Additionally, diatomite significantly improves the surface energy, adhesion and cohesion of bio-asphalt, and reduces spalling work. The dimensionless energy parameter (ER) reaches its peak at a diatomite content of 17%.
李宁利,梁文鑫,栗培龙.硅藻土改性生物沥青的黏附性研究[J].重庆大学学报,2025,48(1):98-106.
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