摘要
为了评价改性乳化沥青-水泥就地冷再生混合料的性能,应用了就地冷再生混合料的配合比设计程序,包括原材料选择、级配设计和性能评价。专用于就地冷再生的改性乳化沥青采用了复配技术和改性剂SBR胶乳,新集料用于调整RAP级配,基于不同改性乳化沥青和水泥含量的性能试验,确定了最佳改性乳化沥青和水泥含量;同时,对通车1 a后的再生路面进行了跟踪观测,推荐了用作面层的乳化沥青就地冷再生混合料的性能评价标准。结果表明,改性乳化沥青-水泥就地冷再生混合料具有较好的强度性能、水稳定性和高温稳定性,实践表明就地冷再生是一种经济有效的养护方式,具有明显的经济效益和社会效益。
In order to evaluate the performance of modified asphalt emulsion-cement recycling mixture, a Cold In-place Recycling （CIR） mix design procedure that includes original material selection, gradation design and performance evaluation was applied. A specific modified asphalt emulsion for cold in-place recycling which applied composite emulsifier technique and addition of SBR latex was used. New aggregate was added in Reclaimed Asphalt Pavement （RAP） material with the objective to adjust RAP gradation. The optimum emulsion and cement contents were determined based on the performance evaluation tests of different modified asphalt emulsion and cement contents.Furthermore, post-project monitoring was performed after one year traffic opening, and the performance evaluation specification of asphalt emulsion CIR mixture used as surface course was recommended. The results indicate that modified asphalt emulsion- cement CIR mixture has good strength, moisture stability and high temperature stability.Application indicates that CIR is a cost- effective maintenance measure according to its remarkable environmental and social benefits.
出处
《公路交通科技》
CAS
CSCD
北大核心
2009年第9期41-45,58,共6页
Journal of Highway and Transportation Research and Development
基金
江苏省交通科技项目(07Y28)
关键词
道路工程
就地冷再生
旋转压实
改性乳化沥青
回收沥青混凝土
road engineering
cold in-place recycling
gyratory compaction
modified asphalt emulsion
reclaimed asphalt concrete
