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CONSTRUCTION AGGREGATES

机译：建筑骨料

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摘要

Natural aggregates, primarily stone, sand and gravel, are recovered from widespread, naturally occurring mineral deposits and processed for use primarily in the construction industry. They are mined, crushed, sorted by size, and sold loose or in concrete products to build roads, houses, buildings and other structures. Smaller quantities are used in agriculture, cement manufacture, and chemical and metallurgical processes. The growth of cities, their buildings and the highways that connect them have created demand for enormous quantities of aggregates. Consumption has now reached 9 t (10 st) per person and continues to grow faster than population. The aggregates industry is the largest mining industry in the United States in terms of production by weight, by volume and by number of active operations. About 80 percent of the concrete pavement and more than 90 percent of the asphalt pavement is composed of aggregates.
机译：天然骨料主要是石头，沙子和砾石，是从广泛的天然矿藏中回收的，主要加工用于建筑业。他们被开采，压碎，按大小分类，然后散装或以混凝土产品出售，以建造道路，房屋，建筑物和其他结构。少量用于农业，水泥制造以及化学和冶金工艺。城市，其建筑物以及连接它们的高速公路的发展，产生了对大量集料的需求。现在，人均消费量达到9吨（10 st），并且其增长速度快于人口增长速度。按重量，产量和活动数量计算，骨料行业是美国最大的采矿业。约80％的混凝土路面和90％以上的沥青路面由骨料组成。

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