长沙理工大学学报（自然科学版）2025，Vol.22Issue(6)：74-88,15.DOI:10.19951/j.cnki.1672-9331.20250730001
低冰点改性沥青胶浆流变性能影响因素研究
Study on factors influencing rheological properties of modified asphalt mastic with low freezing point
摘要
Abstract
[Purposes]The research on the influence of filler with a low freezing point on rheological properties of modified asphalt mastic remains immature,limiting performance improvement in asphalt pavement with a low freezing point.This study aims to investigate the rheological property patterns of modified asphalt mastic with a low freezing point,providing theoretical guidance for the practical engineering application of asphalt mixtures with a low freezing point.[Methods]This study used filler with a low freezing point to replace mineral powder based on the equal volume replacement method and prepared modified asphalt mastic with a low freezing point at powder-to-binder ratios of 0.8,1.0,and 1.2,respectively.Subsequently,the asphalt mastic was tested for viscoelasticity,high-temperature property,fatigue damage resistance,and low-temperature cracking resistance.[Findings]The viscoelasticity,high-temperature property,and fatigue damage resistance of modified asphalt mastic with a low freezing point improve gradually with the increase of powder-to-binder ratio,but the presence of filler with a low freezing point degrades the low-temperature cracking resistance of asphalt mastic.The rheological properties of modified asphalt mastic with a low freezing point are jointly affected by the type of matrix asphalt,the type of modifier,and its dosage.At a powder-to-binder ratio of 1.2,the asphalt mastic prepared with 90#asphalt and 3%SBS star-shaped modifier exhibits a fracture deflection at-12℃that is 1.21 times greater than that of the mastic prepared with 70#asphalt and 3%SBS star-shaped modifier.However,its rutting factor at 60℃is only 77%of the latter's value.The rheological properties of modified asphalt mastic improve with the increase of modifier dosage,but they are relatively less affected by the modifier type.[Conclusions]Fillers with a low freezing point can enhance the high-temperature stability and fatigue resistance of modified asphalt mastic,but this must be balanced against their negative impact on low-temperature cracking resistance.In practical engineering applications,the type of matrix asphalt,the dosage of modifiers,and the proportion of fillers with a low freezing point should be selected reasonably based on climatic conditions and road performance requirements to achieve the balanced optimization of the comprehensive performance of asphalt mastic with a low freezing point.关键词
改性沥青/低冰点填料/粉胶比/沥青胶浆/流变性能Key words
modified asphalt/filler with a low freezing point/powder-to-binder ratio/asphalt mastic/rheological property分类
交通工程引用本文复制引用
何奎亮,郑剑飞,辛力,张建新,王浩安,张磊..低冰点改性沥青胶浆流变性能影响因素研究[J].长沙理工大学学报（自然科学版）,2025,22(6):74-88,15.基金项目
国家重点研发计划项目(2024YFE0216800) （2024YFE0216800）
国家自然科学基金项目(52278447) （52278447）
黑龙江省自然科学基金项目(TD2022E001) Project(2024YFE0216800)supported by National Key R&D Program of China （TD2022E001）
Project(52278447)supported by National Natural Science Foundation of China （52278447）
Project(TD2022E001)supported by Heilongjiang Provincial Natural Science Foundation （TD2022E001）
