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Synthesis of optimal usage of available aggregates in highway construction and maintenance.

机译：在高速公路建设和维护中综合利用可用骨料的最佳方法。

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摘要

The optimization of available aggregates for highway construction and maintenance is vital both from an economic and environmental perspective. By not optimizing the aggregate supply project costs escalate as a simple response to supply and demand, and just as important is the fact that aggregate is a natural resource and a limited one, it is crucial that is used as efficiently as possible. This paper examines specifically the use of aggregates by the South Carolina Department of Transportation, but can easily be adapted to any state. Through DOT surveys and an examination of aggregate gradation specifications, it was determined what specific sieve sizes were significantly different than other states. These specific sizes were then examined to determine if an adjustment of the specifications could better utilize the available aggregates. It was found that times of high construction greatly affect the balance of aggregates, but also that gradation specifications could be adjusted to better use the available aggregate sizes. In South Carolina, hot mix asphalt pavements are the primary causes of over and under utilization of certain aggregate sizes. The 3/8-inch and 1/2-inch aggregates sizes are most overutilized, and these sizes have a relatively tighter specification than other states. Based on the findings of this study, several recommendations have been made. It is recommended to further research the performance of possibly wider specification bands that will utilize some of the more available aggregates in the state. In addition, it is recommended to investigate the use of the maximum dust to binder ratio as well as the possibility of a base substitution, which will better utilize the graded aggregate base. As long as performance and cost can be maintained, these changes could better optimize the usage of the available aggregates in construction and maintenance. Finally, it is recommended that the SCDOT consider methods to forecast future aggregate needs and communicate this with the suppliers, who can then be better prepared to meet the demand.
机译：从经济和环境的角度来看，优化可用于公路建设和维护的骨料是至关重要的。通过不优化总供应项目成本，对供应和需求的简单反应就升级了，总聚合是一种自然资源且数量有限，这一事实也很重要，因此，尽可能有效地利用它至关重要。本文专门研究了南卡罗来纳州交通运输部对骨料的使用，但可以很容易地适用于任何州。通过DOT调查和对骨料等级规格的检查，可以确定哪些特定的筛子尺寸与其他州明显不同。然后检查这些特定的大小，以确定对规格的调整是否可以更好地利用可用的集合体。发现高强度建筑的时间极大地影响了骨料的平衡，而且可以调整等级规格以更好地使用可用的骨料尺寸。在南卡罗来纳州，热拌沥青路面是某些集料尺寸过多和不足的主要原因。 3/8英寸和1/2英寸聚合体的尺寸利用率最高，并且这些尺寸的规格比其他州相对严格。根据这项研究的结果，提出了一些建议。建议进一步研究可能更宽规格频带的性能，这些频带将利用该州更多可用的集合。另外，建议研究最大粉尘与粘结剂的比例以及碱替代的可能性，以更好地利用分级的骨料。只要可以保持性能和成本，这些更改就可以更好地优化可用骨料在建筑和维护中的使用。最后，建议SCDOT考虑预测未来总需求并与供应商进行沟通的方法，以便供应商为满足需求做好更好的准备。

著录项

  • 作者

    Skidmore, Benjamin William.;

  • 作者单位

    Clemson University.;

  • 授予单位 Clemson University.;
  • 学科 Engineering Civil.
  • 学位 M.S.
  • 年度 2009
  • 页码 205 p.
  • 总页数 205
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 建筑科学;
  • 关键词

  • 入库时间 2022-08-17 11:38:30

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