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Road Construction

机译：道路建设

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The reconstruction of 2.5 miles of the Grand River Road between Whitmore Lake and Brighton with 9-in. of high-performance concrete pavement marked the first time in more years than anyone at the Livingston County Road Commission can remember that concrete was used on a major road project. Road agencies are choosing concrete over asphalt for several reasons, principal among which are life-cycle cost, speed of construction and low maintenance. "Life-cycle cost analysis tipped the scale for Livingston County on this project," said Jim Marcinkowski, the consulting engineer on the Grand River project from Orchard, Hiltz & McCliment Inc. (OHM) of Livonia, Mich. "Project costs were close between concrete and asphalt, but the longer life cycle of concrete and its low maintenance cost made concrete the better choice for this project." Fluctuations in oil prices and modifications in the refining process have skyrocketed asphalt job pricing, said Dan DeGraaf, executive director and chief executive officer for the Michigan Concrete Paving Association. Because most state, county and municipal projects are designed and bid over a several-month period during which the per-ton price of asphalt can double or even triple, budgeting for an asphalt project has become tricky at best. DeGraaf pointed to the experience of many agencies who this past summer were forced to cancel several asphalt jobs because of the higher price.
机译：9英寸长，重建了Whitmore湖和Brighton之间2.5英里的Grand River Road。利文斯顿县道路委员会的任何人都记得，混凝土高性能路面是多年来进行的第一次。公路部门之所以选择混凝土而不是沥青，有几个原因，其中主要是生命周期成本，施工速度和维护成本低。来自密歇根州利沃尼亚的乌节，希尔兹和麦克莱门特公司（OHM）的Grand River项目的咨询工程师Jim Marcinkowski表示：“生命周期成本分析为利文斯顿县的发展划上了句号。”介于混凝土和沥青之间，但是混凝土的使用寿命更长且维护成本低，使混凝土成为该项目的更好选择。”密歇根混凝土摊铺协会执行董事兼首席执行官丹·德格拉夫说，油价的波动和精炼工艺的改变使沥青的工作价格飞涨。由于大多数州，县和市级项目都是在几个月的时间内设计和招标的，在此期间沥青的每吨价格可能会翻一番甚至三倍，因此，沥青项目的预算充其量是棘手的。 DeGraaf指出了许多代理商的经验，去年夏天，这些代理商由于价格较高而被迫取消一些沥青工作。

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    《Roads & bridges》 |2009年第1期|p.40-43|共4页
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  • 正文语种 eng
  • 中图分类 公路运输;
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