重载交通路段沥青混合料路面抗车辙与抗疲劳耐久性研究

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中图分类号：TQ178；U414 文献标志码：A 文章编号：1001-5922（2026）03-0704-04

Study on rutting and fatigue durability of asphalt mixture pavement in heavy-duty traffic sections

ZHENG Danyu （Ningbo Zhengxin Testing Technology Co.，Ltd.，Ningbo 315OOO，Zhejiang China）

Abstract：Aiming at the problems of rutting deformation and fatigue cracking prone to occur in asphalt mixture pavements of heavy-duty traffc sections，a performance balance design method based on the synergistic regulation of chemical modifierswasproposed.Styrene-butadiene-styrene block copolymer（SBS），nano-calcium carbonate （ nano-CaCO 3 ） and epoxy modifier were selected as the composite modification system.Through dynamic shear rheometer（DSR）test，multiple stress creep recovery（MSCR）test and four-point bending fatigue test，the influence laws of chemical modifier content on the high-temperature stability，low-temperature crack resistance of asphalt binder as well as the ruting and fatigue resistance of asphalt mixture were systematically studied.Theresults show that when the content of SBS is 4.5% ，nano- .CaCO3 is 3% and epoxy modifier is 1.5% ，the complex shear modulus （ G* ）of modified asphalt increases by 32% ，the phase angle（δ）decreases by 18% ，the dynamicstabilityof the mixture reaches 4800 times/ ，and the fatigue life is extended to 2.3×106 times，realizing the synergistic improvement of rutting and fatigue resistance.This study provides a theoretical basis and engineering reference for the application of chemical modification technology in asphalt pavements of heavy-duty traffic sections.

Key words：chemical modifier;heavy-duty asphalt mixture ;ruting resistance;fatigueresistance;synergisticregulatior

随着我国“交通强国”战略的深人推进，公路货运量年均增长率保持在 6% 以上，重载交通（轴载超过 100kN ）路段占比逐年提升[1]。（剩余6211字）