摘要
结合沈大高速公路沥青混凝土路面破损状况的实测资料,对高等级沥青混凝土路面温度收缩裂缝形成的力学机制和影响因素进行了研究.通过现场对沥青混凝土路面温缩裂缝发育规律的观测及沥青混合料室内试验的研究表明:低温变化速率对沥青混凝土路面内部产生温度应力的大小和性质起决定性作用.沥青的性质和矿料的性质及组成是决定沥青混凝土路面温缩裂缝发育状况的两个控制性因素;而环境因素如气温、路面结构、交通量及路龄则决定温缩裂缝的发育程度.
The mechanical mechanism for temperature shrinkage crack of highgrade asphalt pavement and influencing factors are discussed based on the practical data of asphalt pavement failure state.The insite observation about the distribution law of temperature shrinkage cracks for asphalt pavement and the indoor test to the bituminous mixture indicate that low temperature change rate plays a decisive role in the size and nature of temperature stress. The nature of the asphalt and the nature of mineral aggregates are two important factors which determine the developing state of temperature shrinkage cracks. Environmental factors such as temperature, pavement structure, volume of traffic and road service time determine the development degree of the temperature shrinkage cracks.
出处
《沈阳建筑工程学院学报（自然科学版）》
2003年第2期94-97,共4页
Journal of Shenyang Architectural and Civil Engineering University(Nature Science)
基金
国家建设部科技攻关项目(02-2-2 5)
