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addition aggregate amount annual application approximately asbestos associated ASTM average base boiler bottom ash Bureau cement chemical chrysotile coal communication compacted composition concrete construction containing cost developed disposal drilling dust effect Electric engineering equipment example experience exposure factor feet fibers fibrous field FIGURE fly ash formation Highway increase industry injection less lignite lime major material maximum method minerals Mines mixtures NAp NAp NAp natural occur operating particles percent pilot placed plant pozzolan present pressure problem production properties pump range ratio Research samples sand selected shown shows silicates slag sludge solids specifications standard station strength structural surface talc tests tion tons tremolite United utilization waste workers
Page 30 - As the nation's principal conservation agency, the Department of the Interior has basic responsibilities to protect and conserve our land and water, energy and minerals, fish and wildlife, parks and recreation areas, and to ensure the wise use of all these resources. The department also has major responsibility for American Indian reservation communities and for people who live in island territories under US administration.
Page 7 - UNITED STATES DEPARTMENT OF THE INTERIOR Rogers CB Morton, Secretary BUREAU OF MINES Thomas V. Falkie, Director This publication has been cataloged as follows: Veith, David L Superconcentration of commercial magnetic taconite concentrates by cationic flotation.
Page 9 - Needless to say, this contractor did not submit a bid. "(10) (Reference to specific trade names is made for identification only and does not imply endorsement by the Bureau of Mines...
Page 11 - The results indicate that the United States will not become self-sufficient in crude oil production by 1985 and also illustrate the lead time required to reverse the decline in oil production. Discussion is limited to three of the nine cases to provide high, intermediate, and low results. More emphasis is on the intermediate case because it is indicative of the most probable trends.
Page 85 - SPONSORED BY NATIONAL COAL ASSOCIATION, EDISON ELECTRIC INSTITUTE, AMERICAN PUBLIC POWER ASSOCIATION, NATIONAL ASH ASSOCIATION, AND BUREAU OF MINES, PITTSBURGH, PA., MARCH 13-14, 1973.
Page 61 - An acid plant was installed in 1929 to treat ^Underlined numbers in parentheses refer to items in the list of references at the end of this report. the converter gas, and this alleviated, but did not eliminate, the pollution problem.
Page 51 - Geology of the Williston basin, North Dakota, Montana, and South Dakota, with reference to subsurface disposal of radioactive wastes : US Geol.
Page 26 - Outlook for Energy in the United States to 1985, The Chase Manhattan Bank, New York.
Page 59 - All fly ashes tested greatly improved the resistance of concrete to sulfate attack regardless of the type of cement used." Fly ash in concrete also reduces heat of hydration. In some types of concrete use, such as machinery foundations and other massive structures, this is important. These unique properties of fly ash have a strong effect on the properties of concrete containing fly ash as an ingredient.