| 胶粉表面氧化机理及对改性沥青储存稳定性的影响 |
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| 引用本文： | 程勇,刘玉梅,鞠健,郑木莲,潘希峰,朱月明.胶粉表面氧化机理及对改性沥青储存稳定性的影响[J].硅酸盐通报,2021,40(12):4178-4186. |
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| 作者姓名： | 程勇 刘玉梅 鞠健 郑木莲 潘希峰 朱月明 |
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| 作者单位： | 1.济宁市鸿翔公路勘察设计研究院有限公司,济宁 272002;2.长安大学特殊地区公路工程教育部重点实验室,西安 710064;3.天津市北辰区公路建设养护中心,天津 300499 |
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| 基金项目： | 国家自然科学基金(52078051);山东省技术创新项目(鲁工信技[2020]8号) |
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| 摘 要： | 为了增强胶粉表面活性,改善胶粉改性沥青的储存稳定性,分别采用H2O2溶液和NaClO溶液对废旧胶粉进行表面氧化处理,并考察了FeSO4·7H2O对H2O2溶液氧化过程的催化作用。通过傅里叶红外光谱(FTIR)、扫描电子显微镜(SEM)以及电子能谱(EDS)研究了胶粉氧化前后的微观结构,并采用48 h离析试验对胶粉氧化前后改性沥青的储存稳定性进行了表征。试验结果表明:在两种氧化剂的作用下,胶粉表面活性含氧基团增加,微观形貌发生改变;胶粉氧化前后的主要元素均为C、O、S,且氧化胶粉表面O元素的相对含量显著增加;此外,H2O2-FeSO4溶液氧化的胶粉改性沥青储存稳定性显著提高,满足了我国对聚合物改性沥青的要求。
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| 关 键 词： | 氧化处理 胶粉 NaClO H2O2 微观结构 胶粉改性沥青 储存稳定性 |
Surface Oxidation Mechanism of Crumb Rubber and Its Effect on Storage Stability of Crumb Rubber-Modified Asphalt |
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| CHENG Yong,LIU Yumei,JU Jian,ZHENG Mulian,PAN Xifeng,ZHU Yueming.Surface Oxidation Mechanism of Crumb Rubber and Its Effect on Storage Stability of Crumb Rubber-Modified Asphalt[J].Bulletin of the Chinese Ceramic Society,2021,40(12):4178-4186. |
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| Authors: | CHENG Yong LIU Yumei JU Jian ZHENG Mulian PAN Xifeng ZHU Yueming |
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| Affiliation: | 1. Jining Hongxiang Highway Survey and Design Research Institute Co. , Ltd. , Jining 272002, China;2. Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an 710064, China;3. Tianjin Beichen Road Construction and Maintenance Center, Tianjin 300499, China |
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| Abstract: | In order to enhance the surface activity of crumb rubber and improve the storage stability of crumb rubber-modified asphalt, H2O2 and NaClO solutions were used to oxidize waste crumb rubber powder and the catalytic effect of FeSO4·7H2O on the oxidation process of H2O2 solution was investigated. The microstructures of crumb rubber before and after oxidation were studied by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The storage stability of crumb rubber-modified asphalt was characterized by 48 h segregation test. The results show that the surface active oxygen-containing groups of crumb rubber increase and the microstructures change under the action of two oxidants. The main elements of the powder before and after oxidation are C, O and S. The relative content of O on the surface of oxidized crumb rubber increases significantly. Besides, the storage stability of crumb rubber-modified asphalt oxidized by H2O2-FeSO4 solution is significantly improved, which meets the requirements of polymer-modified asphalt in China. |
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| Keywords: | oxidation treatment crumb rubber NaClO H2O2 microstructure crumb rubber-modified asphalt storage stability |
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