摘要
冬季路面结冰给车辆通行带来极大的安全隐患.本文采用高精度拉伸冻粘强度测试方法测试沥青胶浆及微表处的界面冻粘强度,分析冻结时间、含水量及环境温度对冻粘强度的影响规律.结果表明:随着冻结时间的增加,沥青胶浆及微表处冻粘强度分别从1h的56 kPa、75 kPa快速增加到3h的83 kPa、323 kPa,随后增长缓慢基本趋于稳定,达到热平衡的时间为3h以后.随着成冰水量的增加,冻粘强度先增加后降低,沥青胶浆、微表处分别在1.5 g、5.0 g水量时达到峰值.通过分析沥青基材冻粘强度影响因素,为进一步研究沥青路面冻粘现象提供参考.
Abstract
Road icing poses great safety hazards to vehicles.In this study,a high-precision tensile ice-ad-hesion strength testing method was used to measure the interfacial ice-adhesion strength of asphalt mastic and mi-cro-surface,and the effects of freezing time,water content,and environmental temperature on ice-adhesion strength were analyzed.The results showed that with the increase of freezing time,the ice-adhesion strength of as-phalt mastic and micro-surface rapidly increased from 56 kPa and 75 kPa and 83 kPa and 323 kPa at 3 hours,re-spectively,reaching thermal equilibrium after 3 hours.With the increase of ice formation water content,the ice-adhesion strength first increased and then decreased,reaching peak values at 1.5 g and 5.0 g water content for as-phalt mastic and micro-surface,respectively.The ice-adhesion strength exhibited a logarithmic growth relation-ship with temperature.As the temperature decreased from-1℃ to-10℃,the ice-adhesion strength of asphalt mastic increased from 18 kPa to 179 kPa,while the ice-adhesion strength of the asphalt micro-surface increased from 34 kPa to 618 kPa.By analyzing the influencing factors of ice-adhesion strength in asphalt materials,this study provides references for further research on the ice-adhesion phenomenon of asphalt road surfaces.
基金项目
国家自然科学基金面上项目(52178410)
中央高校基本科研业务费专项资金项目(300102313107)
维普
万方数据