谢娟,陈学儒,罗浩宸,赵勖丞,贺文.不同活化方式对橡胶沥青-集料黏附性的影响[J].表面技术,2023,52(9):322-330.
XIE Juan,CHEN Xue-ru,LUO Hao-chen,ZHAO Xu-cheng,HE Wen.Effect of Different Activation Methods on Adhesion Performance of Rubber Asphalt-aggregate[J].Surface Technology,2023,52(9):322-330 |
| 不同活化方式对橡胶沥青-集料黏附性的影响 |
| Effect of Different Activation Methods on Adhesion Performance of Rubber Asphalt-aggregate |
| 投稿时间：2022-07-29 修订日期：2023-01-06 |
| DOI：10.16490/j.cnki.issn.1001-3660.2023.09.028 |
| 中文关键词: 活化方式 表面能理论 黏附功 黏附性 红外光谱 水煮法 |
| 英文关键词:activation method surface energy theory adhesion work adhesion FTIR boiling method |
| 基金项目:国家自然科学基金(52178411);湖南省教育厅科学研究项目(22A0209);湖南省自然科学基金项目(2023JJ30042) |
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| Author | Institution |
| XIE Juan | School of Traffic and Transportation Engineering, Changsha University of Science & Technology, Changsha 410004, China |
| CHEN Xue-ru | School of Traffic and Transportation Engineering, Changsha University of Science & Technology, Changsha 410004, China |
| LUO Hao-chen | School of Traffic and Transportation Engineering, Changsha University of Science & Technology, Changsha 410004, China |
| ZHAO Xu-cheng | School of Traffic and Transportation Engineering, Changsha University of Science & Technology, Changsha 410004, China |
| HE Wen | School of Traffic and Transportation Engineering, Changsha University of Science & Technology, Changsha 410004, China |
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| 中文摘要: |
| 目的 通过对橡胶粉进行活化处理，提升橡胶沥青-集料的黏附性。研究不同活化方式对橡胶沥青黏附性的影响，探究橡胶沥青与集料的吸附方式。方法 用接枝活化和涂覆活化的方法对橡胶粉进行预处理，通过扫描电子显微镜(Scanning Electron Microscope, SEM)对活化橡胶粉进行表征。分析了橡胶粉经过活化预处理对橡胶沥青黏附性产生影响的原因。通过接触角试验、表面能理论和水煮法试验，分别评价了3种橡胶沥青的表面自由能(Surface Free Energy, SFE)、能量比(Energy Ratio, ER)和黏附等级，并通过红外光谱(Fourier Transform Infrared Spectroscopy, FTIR)对3种橡胶沥青与集料的吸附方式和黏附机理进行分析。结果 普通橡胶沥青(Crumb Rubber Modified Asphalt, CRMA)、涂覆活化橡胶沥青(Coating Activated Crumb Rubber Modified Asphalt, AC-CRMA)和接枝活化橡胶沥青(Grafting Activated Crumb Rubber Modified Asphalt, AM-CRMA)表面自由能分别为:13.28 mJ/m2、13.79 mJ/m2和15.77 mJ/m2;涂覆活化橡胶沥青能量比相较于普通橡胶沥青提高了4.0%，接枝活化橡胶沥青能量比相较于普通橡胶沥青提高了18.5%，接枝活化橡胶沥青能量比相较于涂覆活化橡胶沥青提高了13.9%;普通橡胶沥青的黏附等级为4级，接枝活化橡胶沥青和涂覆活化橡胶沥青的黏附等级均为5级。结论 对橡胶粉进行活化预处理可以有效改善橡胶沥青的黏附性，同时，接枝活化对橡胶沥青黏附性的提升要优于涂覆活化。 |
| 英文摘要: |
| Activated rubber powder modified asphalt can not only mitigate environmental pollution issues caused by waste rubber tire, but also ensure superior pavement performance. Currently, research works related to adhesion between activated rubber powder modified asphalt and aggregate are relatively limited. The weak adhesion between aggregate and asphalt is the main reason of asphalt pavement water damage. In order to promote the engineering application of rubber powder modified asphalt, the work aims to study the effect of adhesion of rubber asphalt with different activation methods based on the surface energy theory and assess the adsorption mode between rubber asphalt and aggregate. Firstly, the rubber powder was pretreated by two activation methods, namely grafting activation and coating activation. The affecting reasons of rubber asphalt adhesion performance after activation pretreatment of rubber powder were analyzed. Furthermore, the contact angle test, surface energy theory, and boiling test were conducted to comprehensively evaluate the contact angle, surface free energy (SFE), adhesion work, spalling work, energy ratio (ER), and adhesion grade. Additionally, the adsorption mode and adhesion mechanism between rubber asphalt and aggregate were evaluated by Fourier transform infrared spectroscopy (FTIR). The results showed that the water contact angles of Crumb Rubber Modified Asphalt (CRMA), Coating Activated Crumb Rubber Modified Asphalt (AC-CRMA) and Grafting Activated Crumb Rubber Modified Asphalt (AM-CRMA) were 105.31°, 103.88° and 99.45°, respectively. The SFE of CRMA, AC-CRMA, and AM-CRMA were 13.28 mJ/m2, 13.79 mJ/m2, and 15.77 mJ/m2 respectively, indicating that rubber powder with the process of activation pretreatment could promote the cohesion force of rubber asphalt. Accordingly, the adhesion work values related to CRMA, AC-CRMA, and AM-CRMA were 54.11 mJ/m2, 55.03 mJ/m2, and 58.27 mJ/m2, respectively. In the case of peeling work, the values were 7.68 mJ/m2, 7.52 mJ/m2 and 6.99 mJ/m2, respectively. Compared to the ER of CRMA, the ER of AC-CRMA and AM-CRMA increased by 4.0% and 18.5%, respectively, while the ER of AM-CRMA increased by 13.9% compared with that of AC-CRMA. The boiling test showed that the adhesion grade of CRMA was 4, while the adhesion grades of AM-CRMA and AC-CRMA were in both cases equal to 5. Activation could increase the specific surface area of rubber powder, and enabled rubber powder to better develop and swell in the matrix asphalt. This fact made the rubber powder crosslink to form a stable three-dimensional network structure, so the more stable rubber asphalt was obtained. After activation treatment, the rubber powder absorbed more light components of the matrix asphalt, which could improve the viscosity of the rubber asphalt. At the same time, it also absorbed part of paraffin which had bad effect on the adhesion of rubber asphalt. Overall, activation pretreatment of rubber powder could effectively improve the adhesion of rubber asphalt, and grafting activation performed much better than coating activation in terms of adhesion performance of rubber asphalt. Moreover, the boiling method test in specification was simple and easy to observe, but it was greatly affected by human subjective factors and macroscopic factors, which was not conducive to obtaining more accurate division results. Finally, the FTIR results showed that the characteristic peaks of rubber asphalt and rubber asphalt-limestone mastics were consistent, indicating that physical adsorption was the main adsorption mode between rubber asphalt and aggregate. |
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