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Construction Aggregate Potential of Minnesota Taconite Industry Byproducts

机译：明尼苏达州Taconite工业副产品的建筑总潜力

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摘要

Every year, mining and processing of Minnesota taconite (iron ore) generates about 125 million tons of byproducts, a figure that is about double the entire state's annual construction aggregate output and usage. Since the year 2000, the Natural Resources Research Institute (NRRI), University of Minnesota Duluth, has been investigating how these vast quantities of byproducts can be used for construction aggregate purposes. The NRRI has been leading a comprehensive research and demonstration program that is designed to: 1) identify new environmentally responsible and economically viable uses for Minnesota Iron Range taconite aggregate material in road construction, road repair, and other applications where crushed stone aggregate is needed; and 2) conduct demonstration projects inside and outside Minnesota.rnThis paper presents a broad overview of the 2006-2009 research program within the context of resource sustainability, energy conservation, and infrastructure benefits. Highlighted research concepts, activities, and results related to cold climate applications include: cold-temperature testing of taconite-based hot-mix asphalt (HMA) mix designs; chemical-free deicing and all-season pothole repair using microwave technology; the development of asphalt- and cement-free pothole repair and patching compounds; and field demonstration projects that use taconite aggregates as an integral road and/or pavement component, such as in high-friction/anti-skid bridge deck surfacing treatments.
机译：每年，明尼苏达州taconite（铁矿石）的开采和加工产生约1.25亿吨的副产品，这个数字大约是整个州年度建筑总产量和使用量的两倍。自2000年以来，明尼苏达州德卢斯大学自然资源研究所（NRRI）一直在研究如何将这些大量的副产品用于建筑集料。 NRRI一直在领导一项全面的研究和示范计划，该计划旨在：1）确定明尼苏达州铁岭水con石骨料在道路建设，道路维修及其他需要碎石骨料的其他应用中对环境负责和经济上可行的新用途； 2）在明尼苏达州内外进行示范项目。本文在资源可持续性，能源节约和基础设施收益的背景下，对2006-2009年研究计划进行了广泛概述。与寒冷气候应用相关的重点研究概念，活动和结果包括：基于石的热混合沥青（HMA）混合料设计的低温测试；使用微波技术进行的无化学除冰和全季节坑洼修复；开发不含沥青和水泥的坑洼修补和修补化合物；现场演示项目，这些项目使用Taconite骨料作为必不可少的道路和/或人行道组件，例如在高摩擦/防滑桥面铺装处理中。

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