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首页> 美国政府科技报告 >Upgrading Unpaved Roads: Road Base Stabilization Using Lime and Fly Ash
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Upgrading Unpaved Roads: Road Base Stabilization Using Lime and Fly Ash

机译：升级未铺砌的道路：使用石灰和粉煤灰进行道路基础稳定

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Over 70% of this country's road miles are unpaved. Increased usage, new industries, and demographic changes place new burdens on many of these rural roads. In the past decade, road construction and maintenance costs have soared. Local government officials and road superintendents are searching for cost-effective alternatives to upgrading these roads using asphalt which may cost $100,000/mile. (In lime-fly ash stabilization road aggregate is thoroughly mixed with lime, fly ash and water to form a new road base to a depth of five or more inches; this new road base is then compacted and covered with a minimum asphaltic surface layer such as a double chip seal.) This guidebook is intended for the roads superintendent in evaluating if road base stabilization using lime and fly ash (an in-expensive waste product of coal-burning power plants) is an economical alternative to asphalt in upgrading a particular road. Detailed guidelines are presented for estimating the cost of materials for an LFA project as well as a description of the necessary construction and maintenance procedures.

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