Report of InvestigationsU.S. Department of the Interior, Bureau of Mines, 1919 - Mineral industries |
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Page 3
... less volume . This results in a concrete that is highly stressed . Both Malhotra ( 18 ) and Dale and Ludwig ( 11 ) have commented on the low freeze - thaw resistance of sulfur mortars . Temperature variations have caused some sulfur ...
... less volume . This results in a concrete that is highly stressed . Both Malhotra ( 18 ) and Dale and Ludwig ( 11 ) have commented on the low freeze - thaw resistance of sulfur mortars . Temperature variations have caused some sulfur ...
Page 11
... less modified sulfur was required to obtain optimum mixtures . The 1 - day strength of the modified sulfur concretes was generally not as high as those for sulfur concrete in blends 1 to 6 which are principally acidic rock aggregates ...
... less modified sulfur was required to obtain optimum mixtures . The 1 - day strength of the modified sulfur concretes was generally not as high as those for sulfur concrete in blends 1 to 6 which are principally acidic rock aggregates ...
Page 18
... less than those made with unmodified sulfur . With limestone rock , the compressive strengths of modified sulfur concretes were equal to or greater than those made with unmodified sulfur . These results indicate that there is a better ...
... less than those made with unmodified sulfur . With limestone rock , the compressive strengths of modified sulfur concretes were equal to or greater than those made with unmodified sulfur . These results indicate that there is a better ...
Page 13
... less effective a constant fill quality is on decreasing relative stope closure . Comparing analyses 5 and 12 illustrates the effect of changes in the initial stress field on relative stope closure . Analysis 5 corresponds to in situ ...
... less effective a constant fill quality is on decreasing relative stope closure . Comparing analyses 5 and 12 illustrates the effect of changes in the initial stress field on relative stope closure . Analysis 5 corresponds to in situ ...
Page 11
... less expensive types of inflatables , such as inflatable cargo dunnage bags . ( See appendix . ) CONCLUSIONS Trials were conducted by the Bureau of Mines to evaluate inflatable stoppings as an emergency measure to control mine fires or ...
... less expensive types of inflatables , such as inflatable cargo dunnage bags . ( See appendix . ) CONCLUSIONS Trials were conducted by the Bureau of Mines to evaluate inflatable stoppings as an emergency measure to control mine fires or ...
Common terms and phrases
aluminum bolt BuMines RI Bureau of Mines burning velocity calculated cell chloride coal coalbed combustion composition compressive strength concentration curves degasification density depth of cut determined dicyclopentadiene drilling dump leach effect electrodes Electromotive force eluate energy Engineering Library enthalpy equation experimental explosions FeCl3 flame front flame speed flotation formation gas flow Gibbs free energy H₂SO heat hole ignition ilmenite inches increase inflatable stoppings INTERIOR investigation iron iron chloride kcal kiln kpsi loading Mary Lee MBOB measured metal methane microcline mixture modified sulfur obtained oxide particles pellets percent phase PNCL pressure radius Raney nickel ratio reaction Report resin rock sample shown in figure slimes solder solution specimens steels stope sulfur concretes surface synthetic leach liquor temperature tests thick tion traveltimes tube U.S. Bureau unburned UNIVERSITY OF MICHIGAN Vacutainers values venting WALKER COUNTY zeta potential
Popular passages
Page 3 - 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.
Page 3 - 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 10 - API, is pumped to storage. 3Reference to specific makes or models of equipment is made to facilitate understanding and does not imply endorsement by the Bureau of Mines.
Page 11 - Haynes, WP, JJ Elliott, AJ Youngblood, and AJ Forney. Operation of a Sprayed Raney Nickel Tube-wall Reactor for Production of a High-Btu Gas.
Page 34 - Prediction of Laminar Flow and Heat Transfer in Helically Coiled Pipes,
Page 9 - Kissell, FN. CM McCulloch, and CH Elder. The Direct Method of Determining Methane Content of Coalbeds for Ventilation Design.