二灰稳定碎石基层混合料配合比设计的探讨  

Study on proportion design of mixture of lime fly ash stabilized bound macadam

作　　者：刘德宾 

机构地区：[1]西安市公路勘察设计院,陕西西安710065

出　　处：《中国建材科技》2014年第3期127-129,共3页China Building Materials Science & Technology

摘　　要：石灰粉煤灰稳定级配碎石作为路面基层(以下简称二灰碎石基层)具有后期强度高、刚度大、抗水稳定性优良等优点。用其作为公路养护工程路面基层时,就与新建公路路面基层的施工有着较大区别。为了基层稳定,避免行车对基层强度的破坏,施工中应严格控制混合料的集料级配和各类材料的配合比例。只有这样,其才能既具有较高的强度、刚度、抗拉裂,缩缝少,雨季施工时,行车偶然碾压不至于大面积翻浆,工程效果较为理想。When being used as road foundation,the hme fly ash stabilized aggregate gradation （hereafter referred to as lime fly ash bound macadam） has the advantages of high long-term strength,large stiffness and good water-resistant stabilization.There is an obvious difference between lime-fly-ash bound macadam and the construction of roadbeds of freshly paved roads when being used as roadbases in road maintenance projects.During the construction,the aggregate grade of ~res and proportion of different materials should be strictly controlled in order to ensure the stability of roadbases and avoid the destruction to roadbase intension from vehicles. Only then can the lime-fly-ash bound macadam have the performance of high strength,large intension,anti-rip and less contraction joints.During the construction in raining seasons,vehicle crush won＇ t cause large road frost heave,and the ideal engineering results are then obtained.

关 键 词：二灰 碎石 基层 配合比 设计 

分 类 号：U416.214[交通运输工程—道路与铁道工程]