• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Fourth European Symposium on Performance of Bituminous and Hydraulic Materials in Pavements, Apr 11-12, 2002, Nottingham, United Kingdom >Cold mix, cold laid semi-flexible Grouted Macadams, mix design and properties
【24h】

Cold mix, cold laid semi-flexible Grouted Macadams, mix design and properties

机译：冷拌，冷敷半柔性灌浆碎石，拌料设计和性能

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

Grouted Macadams consist of a single sized porous asphalt layer laid with a traditional asphalt paver typically to a thickness of up to 60mm. The porous asphalt skeleton is designed to achieve a high void content (28―32%) whilst maintaining a thick bitumen coating on the aggregate particles. The hot asphalt is rolled using a steel wheeled compactor without vibration. As soon as the bituminous mixture has cooled, the voids in the porous asphalt mixture can be filled with the selected fluid grout (cementitious slurry). The Grouted Macadam sections can normally be opened to vehicular traffic 24 h after the voids have been filled with the cementitious grout. Grouted Macadams thus combine the best qualities of concrete and asphalt pavements, namely the flexibility and freedom from joints that characterize asphalt and the high static bearing capacity and wear resistance of concrete. The aim of this investigation was to establish techniques that would reduce the initial cost of Grouted Macadams whilst maintaining their excellent mechanical and performance properties. Two techniques were established; the first was to redesign the conventional hot mix, hot laid porous asphalt skeleton using bituminous emulsions, thus creating a cold mixed, cold laid porous asphalt skeleton suitable for filling with a cementitious grout. A range of tests including: compressive strength, drying shrinkage, indirect tensile stiffness and dynamic creep tests were carried out on these cold mixes and the results compared with a conventional limestone Grouted Macadam. The second technique progresses even further by investigating the potential for utilizing substandard dolomitic aggregates as an alternative to the conventional limestone aggregates in Grouted Macadams, as a cold mixed, cold laid porous asphalt.
机译：灌浆的碎石包含单一尺寸的多孔沥青层，铺有传统的沥青摊铺机，厚度通常不超过60mm。多孔沥青骨架的设计可实现高孔隙率（28-32％），同时在骨料颗粒上保持厚的沥青涂层。使用钢轮夯实机将热沥青轧制，不产生振动。一旦沥青混合物冷却，多孔沥青混合物中的空隙就可以被选定的流体灌浆（胶结浆）填充。通常，在空隙中注满水泥浆后24小时，可以将碎石碎石路段通向车辆。因此，灌浆的碎石结合了混凝土和沥青路面的最佳品质，即具有沥青特征的柔性和无接缝以及混凝土的高静态承载力和耐磨性。这项研究的目的是建立能够降低碎碎碎石的初始成本，同时又保持其优异的机械性能和性能的技术。建立了两种技术；首先是使用沥青乳液重新设计传统的热拌，热铺多孔沥青骨架，从而创造出一种适用于填充水泥浆的冷拌，冷铺多孔沥青骨架。对这些冷拌料进行了一系列测试，包括：抗压强度，干燥收缩，间接拉伸刚度和动态蠕变测试，其结果与传统的石灰石碎石碎石比较。第二种技术的进一步发展是，通过研究将不合格的白云质骨料用作替代碎浆碎石中常规石灰石骨料的潜力，将其用作冷拌冷铺多孔沥青。

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