水性道路标线性能衰减规律研究

Attenuation Law of Water-borne Road Marking Performance

道路标线是保障道路交通安全不可或缺的部分。为明确水性道路标线的性能衰减规律,通过室内模拟老化条件及对试验段进行跟踪监测,分析不同老化周期及不同荷载对水性标线磨耗值的影响,拟合检测的逆反射亮度系数值,探究水性道路标线的磨耗性能和逆反射亮度系数的衰减规律。结果表明,水性标线在紫外老化的作用下主要发生氧化反应和水损害,老化周期在20周期之前,水性标线的磨耗值为0.9~5.8 mg,变化较小;老化20周期之后,随着老化时间的增加,水性标线的磨耗值增加速度变快,40周期磨耗值达到21.5 mg。水性道路标线的逆反射亮度系数随着标线使用时间持续衰减,且在初始阶段衰减速度较慢,随着服役时间的延长,衰减速度变快,与室内模拟老化过程中磨耗性能的衰减规律一致。

Road marking is an indispensable part of road traffic safety.In order to clarify the performance attenuation law of the water-borne road marking,indoor simulated aging conditions and substantial project tracking monitoring were conducted to analyze the influence of different aging cycles and different loads on the abrasion value of water-borne markings,and the coefficient of retroreflected luminance were fitted to study the performance attenuation behavior of water-borne road marking abrasion resistance and coefficient of retroreflected luminance.The result showed that oxidation and water damage mainly occurred in water-borne road marking under ultraviolet aging.When the aging cycle was from 0 to 20 cycles,the abrasion value of the water-borne marking changed little,ranging from 0.9 to 5.8 mg.After 20 cycles,with the increase of the aging cycle,the increase of the abrasion value of the water-borne marking gradually became faster,and the abrasion value reached 21.5 mg at 40 cycles.The coefficient of retroreflected luminance of the water-borne marking decreased continuously with the extension of service time.The decrease rate of the coefficient of retroreflected luminance was slow in the initial stage and became faster with the extension of service time,and it was consistent with the decay law of abrasion resistance in indoor simulated aging process.