基于低含量岩沥青的复合改性技术研究

Research on Composite Modification Based on Low Content Rock Asphalt

基于相似相容、优化设计、成本控制原则,对传统低含量岩沥青成分、有效物质含量、性能指标进行稳定化控制,复合改性形成高性能岩沥青HBRA。将有效沥青物质含量稳定控制在45%,提高了岩沥青混合料高温稳定性,使动稳定度提高至6 000次/mm以上,达到规范要求。该方法并实现了较高沥青物质含量条件下岩沥青的干拌生产,拓宽了岩沥青工程应用范围。

Based on the principle of similarity and compatibility, optimal design and cost control, the effective material content and performance index of traditional low content rock asphalt are stabilized and modified to form high-performance rock asphalt HBRA. The effective asphalt content is stably controlled at 45%, which improves the high-temperature stability of rock asphalt mixture, the dynamic stability is increased to more than 6 000 times/mm, and the requirements of the code are met, the dry mixing production of rock asphalt under the condition of high asphalt content is realized by the method, which widens the application scope of rock asphalt engineering.