摘要
就地复合冷再生层技术是在现场将部分旧沥青层与基层一同再生后，形成既具有一定柔性又具较大刚性的新型路面层结构的一种技术。结合渝涪高速公路沥青路面病害处治工程，研究了就地复合冷再生层的结构厚度和组合、材料参数和工艺参数以及受力分析，并取得了成功的应用经验。研究结果认为：1）在复合铣刨和再生沥青面层和水泥稳定上基层条件下，为了确保就地复合冷再生层的压实质量，其厚度应控制在26cm以内比较适宜；2）复合冷再生层的空隙率应控制小于12％；3）复合冷再生层上应设置一层防水层，而且新铺沥青混凝土厚度应不小于9cm；4）复合冷再生层混合料的主要技术性能宜采用马歇尔流值（3～5mm）、浸水劈裂强度（大于0．45MPa）、冻融劈裂强度比（大于50％）和-10℃弯曲应变（大于1800με）来控制，而动稳定度（大于2000次／mm）仅作为次要技术指标。
The cold in-place reclaimed composite base technique is a technique that the partially old asphalt pavement and the partially old base was milled together then reclaimed in-place as a new base with flexible and rigid property. Taking the treatment project for failed asphalt pavement of Yuhu Expressway in Chongqing as a case study, the structure thickness and the structure composition, the material parameters, the technological parameters were studied and mechanic behavior was discussed for the cold in-place reclaimed composite base. It is found that （1）based on milling and reclaiming asphalt concrete with up-base stabilized by cement together, a suitable compacted thickness should be controlled within the 26cm to ensure the compaction quality for the cold in-place reclaimed composite base, （2）the void contents for the cold reclaimed composite base would be restricted at low than 12 ~//0 ; （3）a waterproof layer should be set and the thickness of new asphalt concrete should be paved to be more than 9cm on the cold in-place reclaimed composite base; （4）the principal technical performances are recommended using the Marshall Flow （to be controlled in the range of the 3-5 mm） .soaked split strength（to be large than 0.45 MPa） .the freeze-thaw split strength ratio（to be large than 50%） and the bend strain（ to be large than 1 800με） as the controlled index of the cold reclaimed composite base. And the dynamic stability（to be large than 2000 times/mm） only is used as a secondary technical performance.
出处
《土木建筑与环境工程》
CSCD
北大核心
2010年第4期49-57,共9页
Journal of Civil,Architectural & Environment Engineering
关键词
就地复合冷再生基层技术
结构参数
材料参数
施工工艺参数
受力分析
Cold in-place reclaimed composite base technology
Structure design parameter
Materialparameter
Construction technological parameter
Mechanical discuss.
