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Show S LAST-FURNACE SLAG TESTS Use of Material for Road Construction Construc-tion to Be Given Test by Bureau of Roads. Elast-furnace slag as a material for concrete road construction Is to be thoroughly studied by the bureau of public roads. United States Department Depart-ment of Agriculture. With the enormous enor-mous demand for read-building material, mate-rial, officials say, economy demands the use of material close at hand wherever possible, and the bureau is now conducting con-ducting Investigations of different materials ma-terials with this In view. Great quantities of slag are to be found at blast furnaces In various parts of the country. Samples from 32 plants have been collected and will be made Into concrete and tested for resistance to wear, strength, water absorption and general utility. These results will be compared with similar tests made on other materials. In addition to the laboratory tests It Is possible that the experiments will be followed by an inspection of a number of concrete roads built with slag ns the coarse material. These roads will be selected In various parts of the country and the reports, together to-gether with the laboratory tests, will furnish information which can be fully relied upon. |