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| 引用本文: | 栾轶博,李志刚,刘聪,张庆成,邓思奇.纳米二氧化硅乳化沥青的制备与Pickering乳化机理分析[J].建筑材料学报,2020,23(1):150-155 |
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| 纳米二氧化硅乳化沥青的制备与Pickering乳化机理分析 |
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栾轶博1, 李志刚2, 刘聪3, 张庆成1, 邓思奇1
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1.陆军工程大学野战工程学院，江苏南京210007;2.东南大学交通学院，江苏南京211189;3.联勤保障部队第五工程代建办公室，河南郑州450000
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| 摘要: |
| 为了提高乳化沥青的路用性能，实现乳化剂与改性剂的统一，在分析Pickering乳化机理与传统乳化沥青乳化机理的基础上，制备了性质良好的新型乳化沥青——纳米SiO2乳化沥青，并通过微观手段分析了乳液稳定机理，最后按照道路用乳化沥青检测方法对纳米SiO2乳化沥青进行了检测.结果表明：除蒸发残留物延度有所降低外，纳米SiO2乳化沥青基本满足道路用乳化沥青技术标准，同时乳液稳定性、蒸发残留物软化点和针入度都得到了改善；在Pickering乳液稳定机理下，用于改性沥青的纳米SiO2可以直接作为乳化剂. |
| 关键词: 乳化沥青 Pickering乳液 纳米SiO2 乳化机理 |
| DOI：103969/j.issn.1007 9629202001023 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(51778621) |
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| Preparation of Nano SiO2 Emulsified Asphalt and Pickering Emulsification Mechanism |
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LUAN Yibo1, LI Zhigang2, LIU Cong3, ZHANG Qingcheng1, DENG Siqi1
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1.School of Field Engineering, Army Engineering University, Nanjing 210007, China;2.School of Transportation, Southeast University, Nanjing 211189, China;3.Acting Construction Office of the Fifth Project of Joint Logistic Support Force, Zhengzhou 450000, China
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| Abstract: |
| In order to improve the performance of emulsified asphalt, a particle emulsifier was introduced. It served both as the emulsifier and modifier for asphalt. A new type of emulsified asphalt, the nano silicon dioxide(SiO2) emulsified asphalt, was prepared successfully. The following steps were conducted in the study. First, a comparison was made regarding the emulsification mechanism between the Pickering and traditional emulsification. Then, the stable nano SiO2 emulsified asphalt was prepared. The stability mechanism of the emulsion was examined through a microscopic approach. Finally, the engineering indexes were tested on the nano SiO2 emulsified asphalt. It is revealed that except the slightly reduced ductility, the nano SiO2 emulsified asphalt can meet the Chinese emulsified asphalt specification with improved stability, penetration, and softening point of the residual after evaporation. In summary, this study verifies the feasibility of using the nano SiO2 as asphalt emulsifier based on Pickering emulsion stability. |
| Key words: emulsified asphalt Pickering emulsion nano SiO2 emulsification mechanism |
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