Improving Gravel Material Specifications for Unpaved Roads: Australian Case Study

IF 3 Q2 CONSTRUCTION & BUILDING TECHNOLOGY International Journal of Pavement Research and Technology Pub Date : 2023-09-15 DOI:10.1007/s42947-023-00355-2
Jeremy Frankel, Farzaneh Tahmoorian
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Abstract

Abstract Gravel surfacing is a cost-effective approach for constructing roads in sparsely populated regions. However, maintaining the shape and usability of gravel roads requires regular upkeep to ensure road user safety. This study focuses on the significant gravel material specifications for wearing courses and highlights the findings of the Department of Transport and Main Roads (TMR) in Australia regarding the crucial role of material specifications in road maintenance routines. The Goondiwindi area in Queensland, featuring approximately 2000 km of gravel roads, serves as a case study for investigating the viability of granular stabilization techniques in enhancing re-sheeting materials for this network. In this research, gravel samples from ten gravel pits in the region were characterized through a range of tests, including particle-size distribution, Atterberg limit, California bearing ratio (CBR), and capillary rise. These laboratory investigations facilitated the development of a desktop analysis tool that predicts the engineering properties of gravel blends obtained from different pits. The validity of this analysis tool was assessed by comparing its results with comprehensive laboratory investigations of gravel samples and their blends. The verification process demonstrated that the results obtained from the desktop analysis tool aligned well with the test results. The study concludes that the analysis tool can effectively identify suitable gravel blends that meet target specifications, provided that the shrinkage product and CBR values of the parent pits are acceptable. The findings of this research can enhance confidence in designing gravel blends for wearing courses based on the properties of individual gravel pits, eliminating the need for additional testing on the gravel blends, and thus reducing costs.
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改进未铺砌道路的砾石材料规格:澳大利亚案例研究
砾石路面是在人口稀少地区修建道路的一种经济有效的方法。然而,保持砂砾路的形状和可用性需要定期保养,以确保道路使用者的安全。本研究侧重于磨损路面的重要砾石材料规格,并强调澳大利亚交通和主要道路部(TMR)关于材料规格在道路维护日常工作中的关键作用的研究结果。昆士兰的Goondiwindi地区拥有大约2000公里的砾石道路,作为研究颗粒稳定技术在增强该网络重新铺层材料方面的可行性的案例。通过粒度分布、Atterberg极限、加利福尼亚承载比(CBR)和毛细上升等一系列测试,对该地区10个砾石坑的砾石样品进行了表征。这些实验室研究促进了桌面分析工具的开发,该工具可以预测从不同坑中获得的砾石混合物的工程特性。通过将该分析工具的结果与砾石样品及其混合物的综合实验室调查结果进行比较,评估了该分析工具的有效性。验证过程表明,从桌面分析工具获得的结果与测试结果很好地吻合。研究表明,只要母坑的收缩率和CBR值可以接受,该分析工具可以有效地识别出符合目标规格的合适砾石混合物。该研究结果可以增强根据单个砾石坑的特性设计适合磨损层的砾石混合物的信心,消除了对砾石混合物进行额外测试的需要,从而降低了成本。
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来源期刊
International Journal of Pavement Research and Technology
International Journal of Pavement Research and Technology Engineering-Civil and Structural Engineering
CiteScore
4.90
自引率
0.00%
发文量
120
期刊介绍: The objective of the International Journal of Pavement Research and Technology is to provide a platform to promote exchange of ideas among pavement engineering communities around the world. The journal attempts to disseminate information on all aspects of pavement engineering and technology developed through research and practical experiences.The journal is published bi-monthly, in January, March, May, July, September, and November each year (six issues in each volume). Contributions in the form of research paper, review, or discussions will be considered for publication. To cover a wide range of pavement engineering disciplines and industrial applications, the journal includes the following topics: Advanced analytical and computational techniques in pavement engineeringPavement mechanics and pavement designPavement construction, performance, management, maintenance, and rehabilitation techniquesPavement materialsPavement recyclingPavement surface and subsurface drainageEnvironmental issues associated with pavement materials and constructionAccelerated and full-scale pavement testingNon-destructive testingInnovative design method and practicePavement-vehicle interaction and safety issuePavement PreservationPavement Instrumentation
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