Moisture stability enhancement of open-graded friction courses filling with oil shale waste based on interface linkage modification

IF 7.9 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials & Design Pub Date : 2025-03-01 Epub Date: 2025-02-02 DOI:10.1016/j.matdes.2025.113684

Yingsong Li , Wei Guo , Xiaoming Huang , Zeqi Chen , Ziyue Zhou , Ying Gao

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Abstract

Oil shale waste (OSW), exhibits a high moisture absorption, which poses a potential moisture damage when filled in asphalt pavement. This study aims to enhance the moisture stability of Open-Graded Friction Courses (OGFC) filling with OSW based on the interface linkage of silane coupling agent (SCA). The moisture sensitivity test showed that the SCA effectively improved the moisture stability of OGFC filling with OSW. After linkage modification, its immersion Marshall stability and spring-thawing Marshall stability increased by about 36 % and 20 %, respectively. Dynamic shear rheometer test exhibited that SCA modified OSW asphalt mortar had the lowest complex modulus aging index of 1.12 %, which indicated that SCA inhibits the water intrusion. The consolidation of asphalt- SCA- OSW interface was 24.32 % higher than that of asphalt- OSW interface after 48 h immersion. After linkage modification, the adhesion rate between OSW and asphalt increased by 14.1 %, the surface energy of OSW decreased by 32.83 %, and the polar component decreased by 85.53 %. Molecular simulation experiments showed that the SCA could increase the adhesion energy between asphalt and OSW under wet condition by 34.5 %. The research findings can expand the application scenarios of OSW in pavement construction and diversify the methods for its utilization.

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基于界面链接改性的油页岩废填料开级配摩擦层湿稳定性增强研究

油页岩废弃物具有较高的吸湿性，填入沥青路面会造成潜在的水分损害。本研究旨在基于硅烷偶联剂（SCA）的界面链接，提高OSW填充的开级配摩擦层（OGFC）的湿稳定性。水分敏感性试验表明，SCA有效提高了OSW填充OGFC的水分稳定性。经过联动改造后，其浸渍马歇尔稳定性和春融马歇尔稳定性分别提高了约36%和20%。动态剪切流变仪试验表明，SCA改性OSW沥青砂浆复合模量老化指数最低，为1.12%，表明SCA抑制了水侵。浸泡48 h后，沥青- SCA- OSW界面固结率比沥青- OSW界面固结率高24.32%。改性后OSW与沥青的粘附率提高了14.1%，OSW表面能降低了32.83%，极性组分降低了85.53%。分子模拟实验表明，在湿态条件下，SCA可使沥青与OSW之间的粘附能提高34.5%。该研究成果可以拓展OSW在路面施工中的应用场景，丰富其利用方法。

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来源期刊

Materials & Design Engineering-Mechanical Engineering

CiteScore

14.30

自引率

7.10%

发文量

1028

审稿时长

85 days

期刊介绍： Materials and Design is a multi-disciplinary journal that publishes original research reports, review articles, and express communications. The journal focuses on studying the structure and properties of inorganic and organic materials, advancements in synthesis, processing, characterization, and testing, the design of materials and engineering systems, and their applications in technology. It aims to bring together various aspects of materials science, engineering, physics, and chemistry. The journal explores themes ranging from materials to design and aims to reveal the connections between natural and artificial materials, as well as experiment and modeling. Manuscripts submitted to Materials and Design should contain elements of discovery and surprise, as they often contribute new insights into the architecture and function of matter.