The Location, Construction and Maintenance of RoadsD. Van Nostrand, 1918 - 226 pages |
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Page 46
... average cost of $ 28 per year per mile . For the year from November , 1914 , to No- vember , 1915 , the benefit of the maintained roads was so well understood by the citizens that 560 miles were under contract at an average cost of ...
... average cost of $ 28 per year per mile . For the year from November , 1914 , to No- vember , 1915 , the benefit of the maintained roads was so well understood by the citizens that 560 miles were under contract at an average cost of ...
Page 56
... average weights were obtained from 670 producers of sand and 560 producers of gravel in all parts of the country ... averages of the reports from ten or more producers in that State . brush to hold the gravel . The stone should be well ...
... average weights were obtained from 670 producers of sand and 560 producers of gravel in all parts of the country ... averages of the reports from ten or more producers in that State . brush to hold the gravel . The stone should be well ...
Page 65
... average , and above 75 , high . In general , the cementing value should run above 25 . For rocks which show a low French coefficient of wear , however , a relatively high cementing value is more necessary than for those which have a ...
... average , and above 75 , high . In general , the cementing value should run above 25 . For rocks which show a low French coefficient of wear , however , a relatively high cementing value is more necessary than for those which have a ...
Page 87
... average toughness of all the traps , with the exception of gabbro , which runs somewhat lower , is about 18 . This is a considerably higher average than that shown by any of the other types or groups . The same relationship holds true ...
... average toughness of all the traps , with the exception of gabbro , which runs somewhat lower , is about 18 . This is a considerably higher average than that shown by any of the other types or groups . The same relationship holds true ...
Page 88
... averages 173 pounds , which is somewhat higher than the average for either limestone or dolo- mite . The maximum absorption is under 2.5 per cent . Quartzites show an average toughness of 15. The quartzites invariably show a low ...
... averages 173 pounds , which is somewhat higher than the average for either limestone or dolo- mite . The maximum absorption is under 2.5 per cent . Quartzites show an average toughness of 15. The quartzites invariably show a low ...
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Common terms and phrases
Abrasion aggregate amount application asphalt average base line binder bituminous bituminous material bonds bottom course bricks broken stone cents cents cents clay coefficient of wear concrete roads construction cost cubic foot cubic yard culverts curb cushion depth desirable distillation drag drain drainage earth roads edges embankment engineers feet filled filler finished French coefficient gallon gilsonite gneiss grade Grahamite gravel gravel roads grout hard hauled heated heavy highway department hydrocarbons Illinois improvements inches joints KOEHRING laid less macadam macadam road mastic metamorphic rocks method miles mineral mixed mixer mixture naphtha obtained paraffin pavement paving petroleum placed Portland Cement pounds properties Public Roads residuum road oils roadbed roadway rock roller rolling sand schists screenings shoulders shovel side ditches sieve slope soft specific gravity square yard subgrade temperature templet thickness top course traffic trench usually viscosity wearing course width
Popular passages
Page 198 - Louisiana Maine Maryland Massachusetts Michigan Minnesota Missouri Montana Nebraska New Hampshire New Jersey "New Mexico New York...
Page 107 - The cement shall not develop initial set in less than 45 minutes when the Vicat needle is used or 60 minutes when the Gillmore needle is used. Final set shall be attained within 10 hours.
Page 108 - The cement shall be stored in such a manner as to permit easy access for proper inspection and identification of each shipment.
Page 117 - Mixtures of native or pyrogenous hydrocarbons and their non-metallic derivatives, which may be gases, liquids, viscous liquids, or solids, and which are soluble in carbon disulphide.
Page 107 - The specific gravity of cement shall not be less than 3.10. Should the test of cement as received fall below this requirement, a second test may be made upon a sample ignited at a low red heat. The loss in weight of the ignited cement shall not exceed 4 per cent.
Page 108 - The cement shall be delivered in suitable bags or barrels with the brand and name of the manufacturer plainly marked thereon, unless shipped in bulk. A bag shall contain 94 Ib. net. A barrel shall contain 376 Ib.
Page 107 - Portland cement is the product obtained by finely pulverizing clinker produced by calcining to incipient fusion an intimate and properly proportioned mixture of argillaceous and calcareous materials, with no additions subsequent to calcination excepting water and calcined or uncalcined gypsum.
Page 117 - ... the application of heat, and which consist of a mixture of hydrocarbons and their derivatives of complex structure, largely cyclic and bridge compounds.
Page 110 - Healdton grade for example, it exists in a form requiring special treatment for its elimination. Oils from the Gulf Field are characterized by relatively high percentages of asphalt and low percentages of the lighter gravity distillation products. Considerable sulphur is present, much of which, however, is in the form of sulphureted hydrogen, and is easily removed by steam before refining or utilizing the oil as fuel. Oils from Wyoming and Colorado are in the main of paraffin base, suitable for refining...
Page 108 - Packages varying more than 5 per cent from the specified weight may be rejected; and if the average weight of packages in any shipment, as shown by weighing 50 packages at random, is less than that specified, the entire shipment may be rejected.