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首页> 外文期刊>Australian Geomechanics >CHARACTERISTICS AND EVALUATION OF RECYCLED CRUSHED ROCK IN RAILWAY SUB-GRADE APPLICATIONS
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CHARACTERISTICS AND EVALUATION OF RECYCLED CRUSHED ROCK IN RAILWAY SUB-GRADE APPLICATIONS

机译：铁路亚级应用中再生碎石的特性与评价

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摘要

The present research represents several laboratory experiments to evaluate the characteristics of recycled crushed rock (RCR) in railway sub-grade applications. Excessive amounts of construction and demolition (C&D) materials have gone to landfill every year and therefore it is necessary to recycle and reuse to reduce the carbon footprint generated throughout the world. A great way to reuse these materials is to put into operation for new construction projects. Although several recycled materials have been used recently in construction industry, little knowledge and research has been undertaken on RCR, which is generated from construction and housing industries. The RCR has previously been used as a structural element of highway pavements and has shown positive results, where very limited and undefined parameters are available. Laboratory test includes sieve analysis, California bearing ratio (CBR), compaction, Atterberg limit and Repeated Load Triaxial (RLT) tests were carried out on specimens sourced locally in Victoria. This research also investigates the resilient moduli (Mr) and permanent deformation characteristics of RCR using RLT equipment to gain a thorough and definite understanding of how the material reacts under cyclic loading due to heavy and continuous cyclic loads on the railway track. A finite element modelling was also developed using laboratory experimental results to compare the permanent deformation obtained from the laboratory and numerical modelling. The physical properties, geotechnical properties and finite element modelling shows that the results were satisfied with the Australian standards and Australian Rail Track Cooperation (ARTC) guidelines for the application in railway systems as sub-grade materials.
机译：本研究代表了若干实验室实验，以评估铁路亚级应用中再生碎石（RCR）的特性。每年的施工和拆迁量过多（C＆D）材料已经进入垃圾填埋场，因此有必要回收和重用以减少全世界产生的碳足迹。重用这些材料的一种很好的方法是投入新的建筑项目。虽然最近在建筑行业中使用了几种回收材料，但在RCR上进行了很少的知识和研究，这是由建筑和住房行业产生的。 RCR先前已被用作公路路面的结构元素，并显示出积极的结果，其中可提供非常有限和未定义的参数。实验室试验包括筛分分析，加州轴承比（CBR），压实，Atterberg极限和重复载荷三轴（RLT）测试在维多利亚州的标本上进行。该研究还使用RLT设备研究RCR的弹性模量（MR）和永久变形特性，以获得彻底的，并确定由于铁路轨道上的重和连续的循环负载，这些材料在循环负荷下对材料作出的反应。还使用实验室实验结果开发了有限元建模，以比较从实验室和数值建模获得的永久变形。物理性质，岩土性特性和有限元建模表明，澳大利亚标准和澳大利亚铁路轨道合作（ARTC）在铁路系统中作为子级材料的应用方案表示满意。

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  • 来源
    《Australian Geomechanics》 |2019年第2期|共9页
  • 作者

    M.A. Rahman; M. Ambrose;

  • 作者单位

    Faculty of Science Engineering and Built Environment Deakin University Waurn Ponds Geelong.;

    Faculty of Science Engineering and Built Environment Deakin University Waurn Ponds Geelong.;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地质力学;
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