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首页> 美国政府科技报告 >Minnesota Taconite as a Microwave-Absorbing Road Aggregate Material for Deicing and Pothole Patching Applications Final rept
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Minnesota Taconite as a Microwave-Absorbing Road Aggregate Material for Deicing and Pothole Patching Applications Final rept

机译：明尼苏达Taconite作为用于除冰和坑洞修补应用的微波吸收道路骨料材料最终报告

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This report presents modeling of temperature profiles for application of microwaves to pothole patching and roadway deicing. Values of key parameters are estimated and presented for asphalt-aggregate composites containing varying magnetite content (compacted and with voids), ice, and water. The key parameters are: microwave absorption coefficient at 2.45 GHz, density, heat capacity, and thermal conductivity. This reports summarizes the work we were able to complete, including a large number of equations characterizing key parameters and an extensive list of references. The natural magnetite in taconite is an outstanding microwave absorber. Consequently, when a truck-mounted microwave generator is driven over an ice-covered roadway constructed with crushed taconite as the aggregate, the microwaves should pass through the ice and be absorbed as heat at the road-ice interface, allowing the ice to be easily detached and scraped away. This energy-efficient process is the only non-chemical method of deicing practical for many miles of roadway. Adoption of this deicing method could lead to a significant demand for taconite aggregate. The same microwave equipment used for deicing could be used year-round for pothole patching applications, with the microwave energy used to generate just the required amount of hot mix on-site for permanent repairs.

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