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使用具有不同塑性指数的经处理和未经处理的人工合成膨胀性道路路基材料优化道路路面厚度和施工深度

Road Pavement Thickness and Construction Depth Optimization Using Treated and Untreated Artificially-Synthesized Expansive Road Subgrade Materials with Varying Plasticity Index.

作者信息

Amakye Samuel Y O, Abbey Samuel J, Booth Colin A, Oti Jonathan

机构信息

Faculty of Environment and Technology, University of the West of England, Bristol BS16 1QY, UK.

School of Engineering, Faculty of Computing, Engineering and Science, University of South Wales, Pontypridd CF37 1DL, UK.

出版信息

Materials (Basel). 2022 Apr 9;15(8):2773. doi: 10.3390/ma15082773.

DOI:10.3390/ma15082773
PMID:35454466
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9027792/
Abstract

Road pavement thickness and their depth of construction take a chunk of the overall cost of road construction. This has called for a need for reduced road pavement thickness by improving the engineering properties of subgrade such as the California bearing ratio (CBR). The CBR of road subgrade has been a major determining factor for road pavement thickness, and expansive subgrades generally have a low CBR, resulting in major road defects. In this study, road pavement thickness and construction depth optimization were conducted using the CBR values achieved in this study. Additives proportions of 8% lime and 20% cement were used in expansive subgrade to improve their engineering properties, making them suitable for use in road construction. The study investigated the characteristics, mineral structure, Atterberg limit, compaction, CBR, swell and microstructural properties of expansive subgrade. The results show a reduction in road pavement thickness and a construction depth with an increase in CBR value. All CBR values for treated samples were above 2%, making them usable in road construction. A reduction in swell potential up to 0.04% was observed for treated expansive subgrade. The study concluded that pavement thickness and construction depth can be reduced by enhancing subgrade materials and using cement and lime as binders.

摘要

道路路面厚度及其施工深度占道路建设总成本的很大一部分。这就需要通过改善路基的工程性质（如加州承载比（CBR））来降低道路路面厚度。道路路基的CBR一直是道路路面厚度的主要决定因素，而膨胀性路基的CBR通常较低，会导致严重的道路缺陷。在本研究中，利用本研究获得的CBR值对道路路面厚度和施工深度进行了优化。在膨胀性路基中使用了8%石灰和20%水泥的添加剂比例来改善其工程性质，使其适合用于道路建设。该研究调查了膨胀性路基的特性、矿物结构、液塑限、压实度、CBR、膨胀和微观结构性质。结果表明，随着CBR值的增加，道路路面厚度和施工深度减小。所有处理后样品的CBR值均高于2% , 使其可用于道路建设。观察到处理后的膨胀性路基膨胀潜力降低了0.04%。该研究得出结论，通过增强路基材料并使用水泥和石灰作为粘结剂，可以降低路面厚度和施工深度。

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