The Location, Construction and Maintenance of RoadsD. Van Nostrand, 1918 - 226 pages |
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Page 1
... cent and to avoid expensive cuts , fills and bridges . To locate the road properly and meet all local conditions in the best manner requires competent engineering services ; if they are not obtained there is a strong probability that ...
... cent and to avoid expensive cuts , fills and bridges . To locate the road properly and meet all local conditions in the best manner requires competent engineering services ; if they are not obtained there is a strong probability that ...
Page 4
... cent grade , 720 pounds on 24 per cent grades , 640 pounds on 3 per cent grades , 540 pounds on 4 per cent grades , 400 pounds on 5 per cent grades and only 250 pounds on 10 per cent grades . These figures are only approximate but they ...
... cent grade , 720 pounds on 24 per cent grades , 640 pounds on 3 per cent grades , 540 pounds on 4 per cent grades , 400 pounds on 5 per cent grades and only 250 pounds on 10 per cent grades . These figures are only approximate but they ...
Page 5
... cent , no flattening is necessary . If the change is 10 per cent a vertical curve about 200 feet long should be employed ; for a 13 per cent change , a curve 292 feet long and for a 16 per cent change , a curve 360 feet long . Widths ...
... cent , no flattening is necessary . If the change is 10 per cent a vertical curve about 200 feet long should be employed ; for a 13 per cent change , a curve 292 feet long and for a 16 per cent change , a curve 360 feet long . Widths ...
Page 10
... cent , and there should be a portion level or nearly so for a distance of not less than 100 feet on each side of the crossing . 2. On the highway within 200 feet of the railroad , on each side , traffic should have a clear view of ...
... cent , and there should be a portion level or nearly so for a distance of not less than 100 feet on each side of the crossing . 2. On the highway within 200 feet of the railroad , on each side , traffic should have a clear view of ...
Page 17
... cent of grade in red . Points of change in the rate of the finished grade and the beginning and end of vertical curves shall be in- dicated by small circles . No title need be placed on the working plans ; they shall be identified by ...
... cent of grade in red . Points of change in the rate of the finished grade and the beginning and end of vertical curves shall be in- dicated by small circles . No title need be placed on the working plans ; they shall be identified by ...
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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.