...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The international journal of pavement engineering & asphalt technology >DYNAMIC FIELD ASSESSMENT OF SHORT TERM BEARING CAPACITY FOR COLD RECYCLED LAYERS
【24h】

DYNAMIC FIELD ASSESSMENT OF SHORT TERM BEARING CAPACITY FOR COLD RECYCLED LAYERS

机译：冷再生层短时承载力的动态现场评估

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The need to apply in situ cold recycling techniques for flexible pavement rehabilitation arises in response to economic, environmental and operational issues. Where a pavement is in a distressed state there is always an option to recycle the existing material and obtain benefits in terms of lower construction costs, improved durability and reduction in the negative effects that construction has on the environment. The possibility offered by foam bitumen stabilized layer to allow immediate construction of the upper layers of the pavement is often in contrast with times requested by the traditional testing techniques. In this regards the use of Light Weight Deflectometer (LWD) systems offers the possibility to evaluate short term bearing capacity of cold recycled layers for quality control/quality assurance (QC/QA) activities. Moreover, this allows a large amount of data to be recorded rapidly, thereby guaranteeing a more detailed investigation and the possibility to identify homogeneous sections and, in extreme cases, to re-work the layer before the pavement is completed. This paper reports the results of several experiences on validation of innovative field testing systems for recycled layers. Different curing time periods were taken into account, as far as the influence of the anisotropic factor induced by compaction: different tracks for each lane were tested at different curing periods, both for lime-cement stabilized subbase and foamed asphalt recycled layers, to obtain the development of the stiffness and a higher resolution of bearing capacity mapping. Comparison of results obtained with LWD immediately after compaction with Falling Weight Deflectometer (FWD) was also performed at an Italian international airport. The results obtained appear very promising for upcoming insertion of the methodologies into existing technical prescriptions and specifications.
机译：响应于经济，环境和运营问题，需要采用现场冷再生技术进行柔性路面修复。如果人行道处于不良状态，则始终可以选择回收现有材料，并从较低的建筑成本，提高的耐久性和减少施工对环境的负面影响方面获得收益。与传统的测试技术所要求的时间相比，泡沫沥青稳定层提供了立即建造人行道上层的可能性。在这方面，轻型挠度计（LWD）系统的使用为评估质量控制/质量保证（QC / QA）活动的冷再生层的短期承载能力提供了可能性。此外，这允许快速记录大量数据，从而保证了更详细的调查，并确保了识别均质截面的可能性，并在极端情况下保证了在铺装完成之前重新加工该层。本文报告了有关验证可再生层的创新现场测试系统的几种经验的结果。考虑到压实引起的各向异性因素的影响，考虑了不同的固化时间段：在不同的固化时间段测试了每个车道的不同轨道，包括石灰水泥稳定的基层和泡沫沥青再生层，以得到刚度的发展和更高的承载力图分辨率。在意大利国际机场还进行了压摆法（FWD）压实后立即与LWD进行的结果比较。所获得的结果对于即将将方法学插入现有技术规范和规范中显得很有希望。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号