疏水性纳米白炭黑对沥青胶结料低温性能的影响

doi:10.12141/j.issn.1000-565X.190717

华南理工大学学报（自然科学版） ›› 2020, Vol. 48 ›› Issue (5): 49-57.doi: 10.12141/j.issn.1000-565X.190717

疏水性纳米白炭黑对沥青胶结料低温性能的影响

戴文亭¹ 安胤¹ 郝如意¹ 郭威¹ 孙明志²

1．吉林大学交通学院，吉林长春 130022; 2．交通运输部公路科学研究院，北京 100088

收稿日期:2019-10-15 修回日期:2019-12-24 出版日期:2020-05-25 发布日期:2020-05-01
通信作者: 戴文亭(1964-)，男，博士，教授，主要从事道路建筑材料研究。 E-mail:daiwt@jlu.edu.cn
作者简介:戴文亭(1964-)，男，博士，教授，主要从事道路建筑材料研究。
基金资助:
国家自然科学基金面上项目 (51178204); 吉林省科技发展计划项目 (20190303033SF)

Effects of Hydrophobic Nano-Silica on the Low-Temperature Performance of Asphalt Binder

DAI Wenting¹ AN Yin¹ HAO Ruyi¹ GUO Wei¹ SUN Mingzhi²

1． College of Transportation，Jilin University，Changchun 130022，Jilin，China;2． Research Institute of Highway，Ministry of Transport，Beijing 100088，China

Received:2019-10-15 Revised:2019-12-24 Online:2020-05-25 Published:2020-05-01
Contact: 戴文亭(1964-)，男，博士，教授，主要从事道路建筑材料研究。 E-mail:daiwt@jlu.edu.cn
About author:戴文亭(1964-)，男，博士，教授，主要从事道路建筑材料研究。
Supported by:
Support by the General Program of the National Natural Science Foundation of China (51178204) and the Sci-ence and Technology Development Plan Project of Jilin Province (20190303033SF)

摘要/Abstract

摘要： 为研究疏水性纳米白炭黑对沥青胶结料低温性能的影响，应用常规沥青低温性能试验和胶浆小梁弯曲试验对比评价疏水性纳米白炭黑改性沥青、纳米白炭黑改性沥青和 90^# 基质沥青的低温性能，通过扫描电镜分析两种改性材料的特点与改性机理，基于微观分析结果，采用傅里叶红外光谱研究改性材料对沥青低温性能的增强机理。结果表明，疏水性纳米白炭黑改性沥青的针入度指数 PI 值最大，其低温脆点比纳米白炭黑改性沥青低 80%，－15℃时最大弯拉应变比基质沥青高 350%，比纳米白炭黑改性沥青高80%。- 15℃时极限弯拉强度比基质沥青高 69%，低温性能优异; 疏水性纳米白炭黑颗粒尺寸比纳米白炭黑小 11%，粒径分布更均匀，颗粒表面为有机性且更粗糙，拌合不易聚团，改性颗粒与沥青构成三维网格型受力结构，改善了沥青低温受力特性; 疏水性纳米白炭黑与沥青之间生成了 C—O 化学键，增强了改性材料颗粒与沥青的粘结，强化学粘结缩短了沥青拉伸链长度使变形能力增加。

关键词: 路面工程, 疏水性纳米白炭黑改性沥青, 微观分析, 低温性能, 影响机理

Abstract: The low-temperature performances of 90# asphalt，nano-silica modified asphalt and hydrophobic nano-silica modified asphalt were comparatively evaluated with low-temperature performance test of conventional asphalt and bending test of small mortar beam in order to investigate the effect of the hydrophobic nano-silica on the low-temperature performance of asphalt binder． Scanning electron microscope test were conducted to analyze the chara-cteristics and modification mechanism of the two kind of modified materials． Then the Fourier transform infrared spectroscopy test was conducted to study the function mechanism of modified asphalt to improve low-temperature performance of asphalt．Ｒesearch results show that: the penetration index of hydrophobic nano-silica modified as-phalt is the highest; its equivalent brittle point is 80% lower than that of nano-silica modified asphalt; its maxi-mum flexure tensile strain is 80% higher than that of nano-silica modified asphalt and 350% higher than that of ma-trix asphalt at －15℃; its ultimate flexural tensile strength is 69% higher than that of matrix asphalt at －15℃，which indicates that the low temperature performance of hydrophobic nano-silica modified asphalt is excellent． Hy-drophobic nano-silica particle is 11% smaller than nano-silica particle，and the size distribution of hydrophobic nano-silica particle is more uniform． The surface of hydrophobic nano-silica particle is organic． Compared with nano-silica particle，the surface of hydrophobic nano-silica particle is rougher． Hydrophobic nano-silica particle is not easy to gather when modified mixing． The three-dimensional mesh structure formed by modified particles and asphalt improves the low-temperature characteristics of asphalt． The C—O chemical bond is formed between hydro-phobic nano-silica and asphalt，which enhances the bond between modified particles and asphalt，and the strong chemical bond shortens the length of asphalt tensile chain which results in an increase in the deformation ability．

Key words: pavement engineering, hydrophobic nano-silica modified asphalt, microanalysis, low-temperature performance, influence mechanism

中图分类号:

U414

戴文亭, 安胤, 郝如意, 等. 疏水性纳米白炭黑对沥青胶结料低温性能的影响[J]. 华南理工大学学报（自然科学版）, 2020, 48(5): 49-57.

DAI Wenting, AN Yin, HAO Ruyi, et al. Effects of Hydrophobic Nano-Silica on the Low-Temperature Performance of Asphalt Binder[J]. Journal of South China University of Technology (Natural Science Edition), 2020, 48(5): 49-57.

[1]	夏慧芸, 杨浩田, 卢昌杰, 等. 复合改性沥青密封胶的组成优化及性能研究[J]. 华南理工大学学报(自然科学版), 2023, 51(6): 136-145.
[2]	黄文通徐国元. 布敦岩沥青混合料路用性能的试验研究[J]. 华南理工大学学报(自然科学版), 2012, 40(2): 87-91.
[3]	尹应梅张肖宁邹桂莲. 基于玻璃化转变温度的沥青混合料低温性能研究[J]. 华南理工大学学报（自然科学版）, 2010, 38(10): 89-93.

疏水性纳米白炭黑对沥青胶结料低温性能的影响

Effects of Hydrophobic Nano-Silica on the Low-Temperature Performance of Asphalt Binder

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