• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Geotechnical frontiers >Laboratory Investigation of the Mechanical Stability of Unbound Permeable Aggregate Base Materials: Preliminary Direct Shear Test Results
【24h】

Laboratory Investigation of the Mechanical Stability of Unbound Permeable Aggregate Base Materials: Preliminary Direct Shear Test Results

机译：未结合的可渗透集料基础材料的机械稳定性的实验室研究：初步直接剪切试验结果

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Unbound permeable aggregate base (UPAB), due to its relatively high porosity and permeability, is considered as an alternative to traditional impervious (e.g., dense-graded) bases for controlling subsurface drainage and pavement longevity in an economical and environment-friendly way. The UPAB layer is normally made of open-graded unbound aggregates and thus tends to suffer from insufficient structural strength (or stability). Aimed at further validating a new gradation concept for enhanced structural strength, this paper presented preliminary findings from a series of laboratory tests conducted to evaluate various gradation designs of UPAB materials in relation to mechanical stability. Five representative gradations were selected according to the current UPAB gradation band, and the effects of different UPAB gradation designs on the shear strength properties were investigated using a large-scale direct shear test device. Based on the experimental results, the optimum aggregate gradation design recommended by the new gradation concept for enhanced stability was consequently validated. The use of such optimal gradation is expected to achieve cost-effective UPAB design for long-life concrete pavements.
机译：未结合的渗透性骨料基料（UPAB）由于其较高的孔隙率和渗透率，被认为是传统的不渗透（例如致密等级）基料的替代品，以经济和环保的方式控制地下排水和路面寿命。 UPAB层通常由开梯度的未结合的骨料制成，因此倾向于遭受结构强度（或稳定性）不足的困扰。为了进一步验证用于增强结构强度的新等级概念，本文提供了一系列实验室测试的初步发现，这些测试旨在评估UPAB材料的各种等级设计与机械稳定性之间的关系。根据当前的UPAB等级带选择了五个代表性的等级，并使用大型直接剪切试验装置研究了不同UPAB等级设计对剪切强度性能的影响。基于实验结果，因此验证了新的渐变概念所建议的最佳骨料渐变设计，以增强稳定性。预期使用这种最佳等级可实现长寿命混凝土路面的经济高效的UPAB设计。

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