板式无砟轨道系统中CA砂浆动态力学性能的温度循环诱导退化

Temperature cycling (TC) induces degradation in the dynamic mechanical properties of Cement Asphalt (CA) mortar used in railway ballastless track systems. The moisture condition critically affects this degradation; dry mortar exhibits an increase in storage modulus and a decrease in loss factor, while water-saturated mortar shows the opposite tendency. The asphalt-to-cement (A/C) ratio significantly impacts the modulus growth rate and aging mechanisms. A viscoelastic constitutive model based on the fractional differential three-parameter solid model accurately fits the dynamic test curves under different TC conditions. / 温度循环（TC）导致板式无砟轨道系统中使用的水泥沥青（CA）砂浆动态力学性能退化。含水状态对此退化有关键影响；干燥砂浆表现出储能模量增加和损耗因子降低，而饱和砂浆表现出相反趋势。沥青与水泥（A/C）比显著影响模量增长率和老化机制。基于分数阶微分三参数固体模型的粘弹性本构模型能准确拟合不同TC条件下的动态测试曲线。

Knowledge type

工艺技术

First proposed or discovered

Proposer

Turkey Farm member

Creator

农场主

Last updated

2026-11-04 20:06:20