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    Mineral Aggregates in the Chemical and Processing Industries and in Certain other Uses

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    The uses of mineral aggregates can be grouped into these three general classes: (a) That in which the aggregate serves the desired purpose without any binder, such as filter bed material, railroad ballast, etc., and remains practically as prepared throughout its useful lifetime, (b) That in which the aggregate is mixed with some cementing material, such as in bituminous or portland-cement concrete, etc., to form a new shape and mass, and be used in some phase of construction, and (c) That in which the aggregation loses its identity, undergoes some chemical or physical change, and may enter into combination with other materials chemically, as in the case of flux stone, mineral wool aggregate, agricultural liming products, and so forth. The statistics given in the preprints of the chapters on “Stone” and “Sand and Gravel” of the Minerals Yearbook for 1946 (1) have been regrouped in Table I to permit quick appraisal of the tonnages of mineral aggregates according to their various usages. The uses in each group are arranged in order of their tonnage reported for that year, which is the latest information available. The first group contains all the aggregates entering the general field of construction, roads, and railroads. These materials have been covered by the other papers in this Symposium.

    Author Information:

    Kriege, Herbert F.
    Technical Director, The France Stone Co., Perrysburg, Ohio

    Committee/Subcommittee: C09.21

    DOI: 10.1520/STP46221S