纳米SiO 2在乳化沥青中的不同形态及对乳液存储稳定性的影响
作者:
作者单位:

(1.中交四公局第六工程有限公司 ,天津市 301700 ;2.江苏道智公路科学研究院有限公司 ,江苏 南京 210031 ;3.东南大学 交通学院 ,江苏 南京 211189 )

作者简介:

冀超,男,大学本科,工程师.E-mail:1340069047@qq.com

通讯作者:

李志刚,男,博士,研究员.E-mail:3532068860@qq.com

中图分类号:

U414

基金项目:

国家自然科学基金资助项目(编号:51778621)


Different Forms of Nano‑SiO2 in Emulsified Asphalt and Their Effects on Emulsion Storage Stability
Author:
Affiliation:

(1.Sixth Engineering Branch of CCCC Fourth Highway Engineering Co ., Ltd., Tianjin 301700 , China ;2.Jiangsu Daozhi Highway Research Institute Co ., Ltd., Nanjing , Jiangsu 210031 , China ;3.School o f Trans portation , Southeast University , Nanjing , Jiang su 211189 , China )

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    摘要:

    乳化沥青存储性能不足一直是影响其应用的较大问题,中国已有将纳米 SiO 2粒子作为添加剂来改善乳化沥青稳定性的研究,但其效果不明显。该文基于 Pickering 乳液原理将表面改性后的纳米 SiO 2作为乳化剂直接乳化基质沥青,探究是否比纳米 SiO 2作为改性添加剂对乳化沥青的稳定性改善效果更佳。首先分别制备了普通改性乳化沥青 A、纳米 SiO 2做改性添加剂的乳化沥青 B和基于新型纳米 SiO 2Pickering 乳液乳化的乳化沥青 C共3种乳化沥青,然后通过光学显微镜与SEM,探究纳米 SiO 2粒子分别作为乳化剂和改性剂时乳化沥青表面结构的微观形貌差异,分析 3种乳化沥青中乳液颗粒的不同形态;最后通过室内乳化沥青试验和乳液颗粒粒径分析,进一步论证纳米 SiO 2分别作为乳化剂与改性剂对于乳化沥青存储稳定性的差异及差异机理。微观与宏观试验均表明纳米 SiO 2作为乳化剂比作改性剂能使乳化沥青具备更好的稳定性。该文的研究说明纳米 SiO 2用作乳化剂能更好地解决乳化沥青稳定性不足的问题,具有很好的应用前景。

    Abstract:

    The insufficient storage performance of emulsified asphalt has always been a problem affecting its application,and there have been studies in China on nano-SiO2 particles as additives to improve the stability of emulsified asphalt,but the effect is not obvious.Based on the principle of Pickering emulsion,nano-SiO2 with surface modification was used as an emulsifier to directly emulsify matrix asphalt,and whether its stability improvement effect on emulsified asphalt is better than nano-SiO2 as a modified additive was explored.Firstly,three emulsified asphalt were prepared,namely ordinary modified emulsified asphalt A,emulsified asphalt B with nano-SiO2 as a modified additive,and emulsified asphalt C based on the new nano-SiO2 Pickering emulsion emulsification.Then,through optical microscopy and SEM,the microscopic morphological differences of the surface structure of the emulsified asphalt with nano-SiO2 particles as emulsifiers and modified additives were explored,and the different morphologies of emulsion particles in three emulsified asphalt were analyzed.Finally,the indoor emulsified asphalt test and particle size analysis of emulsion particles demonstrated the difference between nano-SiO2 as an emulsifier and a modified additive for the storage stability of emulsified asphalt and the mechanism of difference.Both microscopic and macroscopic experiments have shown that nano-SiO2 as an emulsifier can make emulsified asphalt have better stability compared with nano-SiO2 as a modified additive.The research indicates that nano-SiO2 as an emulsifier can better solve the problem of insufficient stability of emulsified asphalt and has good application prospects.

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冀超,曹元浩,李志刚.纳米SiO 2在乳化沥青中的不同形态及对乳液存储稳定性的影响[J].中外公路,2024,44(1):76-81.
JI Chao, CAO Yuanhao, LI Zhigang. Different Forms of Nano‑SiO2 in Emulsified Asphalt and Their Effects on Emulsion Storage Stability[J]. Journal of China and Foreign Highway,2024,44(1):76-81.

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  • 收稿日期:2022-05-31
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  • 在线发布日期: 2024-03-18
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