摘要
为提高冰雪天气沥青路面的运营安全,探讨内掺型储盐类融雪抑冰剂MFL(Mafilon)对沥青胶浆流变性能的影响,通过动态剪切流变试验(DSR),系统分析不同MFL替代矿粉比例(25%、50%、75%、100%)和不同粉胶比(0.6~1.4)下沥青胶浆的复数剪切模量主曲线、储能模量、车辙因子及疲劳因子等技术指标。结果表明:不同MFL替代率的沥青胶浆复数剪切模量主曲线均高于基质沥青与SBS改性沥青,当MFL替代率较低时,为提高沥青胶浆的高温抗车辙性能,建议粉胶比取1.0左右;当MFL替代率较高时,沥青胶浆的抗疲劳开裂能力改善更优,但抗变形能力略有下降,建议粉胶比取0.6~0.8;随着MFL替代率的增加,沥青胶浆的储能模量与车辙因子呈先升后降的趋势,疲劳因子显著升高,表明MFL的掺加量需考虑沥青抗车辙与抗疲劳性能的平衡。
To enhance the operational safety of asphalt pavements in snowy and icy conditions,this study investigated the influence of the internally incorporated salt-storage deicing agent MFL(Mafilon)on the rheological properties of asphalt mortar.Through dynamic shear rheometer(DSR)tests,the complex shear modulus master curves,storage modulus,rutting factor,and fatigue factor of asphalt mortar were systematically analyzed under different MFL replacement ratios of mineral powder(25%,50%,75%,100%)and filler-asphalt ratios(0.6 to 1.4).The results show that the main curves of the complex shear modulus of asphalt mortar with different MFL replacement ratios are all higher than those of base asphalt and SBS modified asphalt.When the MFL replacement ratios is low,filler-asphalt ratios of around 1.0 are recommended to enhance the high-temperature rutting resistance of asphalt mortar.At high replacement ratios,the fatigue cracking resistance improves more prominently,albeit with a slight decline in deformation resistance,thus recommending filler-asphalt ratios of 0.6 to 0.8.The storage modulus and rutting factor initially increase and then decrease with rising replacement ratios,while the fatigue factor markedly increases,indicating that the incorporation of MFL necessitates balancing rutting resistance and fatigue performance.
作者
姚立阳
高文英
YAO Li-yang;GAO Wen-ying(Henan University of Urban Construction,Pingdingshan 467036,China)
出处
《河南城建学院学报》
2025年第4期50-55,共6页
Journal of Henan University of Urban Construction
基金
河南省高等学校重点科研项目(25B580002)。
关键词
MFL融雪抑冰剂
沥青胶浆
流变性能
储能模量
车辙因子
疲劳因子
MFL snow-melting and ice-suppressing agent
asphalt mortar
rheological properties
storage modulus
rutting factor
fatigue factor
