摘要
针对沥青老化对路面结构的影响,通过短期RTFOT试验,对使用年限、路面深度及空隙率进行研究。结果表明:沥青路面在使用初期的老化最为严重,随后老化速率逐渐降低;路面深度增加时,沥青老化程度降低,面层底部沥青的软化点有所增加;空隙率增加时,沥青老化程度逐渐增加;上面层模量增加时,路面表层的开裂概率随之增加。
In view of the influence of asphalt aging on the pavement structure, the short-term RTFOT test was used to study the service life, depth of pavement and porosity. The results show that the aging of asphalt pavement is the most serious in the early stage of service life, and then the aging rate is gradually reduced; when the depth of the pavement increases, the asphalt aging is reduced, and the asphalt ductility in the middle layer is the lowest, and the softening point of the asphalt at the bottom of the surface course increases; the aging of asphalt aggravates when the porosity increases; when the modulus of the upper layer increases, the cracking probability of the surface course increases.
出处
《筑路机械与施工机械化》
北大核心
2017年第8期89-93,共5页
Road Machinery & Construction Mechanization
关键词
空隙率
梯度模量
沥青路面
路面开裂
porosity
gradient modulus
asphalt pavement
pavement cracking
