The Location, Construction and Maintenance of RoadsD. Van Nostrand, 1918 - 226 pages |
From inside the book
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Page 1
... increased transportation needs and the expenditures for new rights - of - way will be far greater than to - day . But if , for the present , engineering services are out of the question , the road authorities can at least relocate roads ...
... increased transportation needs and the expenditures for new rights - of - way will be far greater than to - day . But if , for the present , engineering services are out of the question , the road authorities can at least relocate roads ...
Page 3
... increased first cost . Profile of new road- Profile of ground at new location Profile of old road , PROFILE OF ROAD IN BALTIMORE COUNTY , MD . Showing How Relocation Saved a Large Sum in the Improvement of the Road . Value of ...
... increased first cost . Profile of new road- Profile of ground at new location Profile of old road , PROFILE OF ROAD IN BALTIMORE COUNTY , MD . Showing How Relocation Saved a Large Sum in the Improvement of the Road . Value of ...
Page 8
... increased on sharp curves , except where it is already wide , and the right - of - way at right angle intersections should be widened and cleared so as to give drivers on the crossing roads a good view of approaching vehicles . This is ...
... increased on sharp curves , except where it is already wide , and the right - of - way at right angle intersections should be widened and cleared so as to give drivers on the crossing roads a good view of approaching vehicles . This is ...
Page 19
... increases their area and depth rapidly . The impervious crust is finally broken through , allowing water to reach the roadbed , which gives way under heavy loads and the condition of the roadway becomes very bad . If water collects in ...
... increases their area and depth rapidly . The impervious crust is finally broken through , allowing water to reach the roadbed , which gives way under heavy loads and the condition of the roadway becomes very bad . If water collects in ...
Page 21
... increase the crown as the grades become steeper . For all grades up to and including 5 per cent , the crowns ... increased that the water will be shed to the side of road rather than run down its surface or , at least , make a curve in ...
... increase the crown as the grades become steeper . For all grades up to and including 5 per cent , the crowns ... increased that the water will be shed to the side of road rather than run down its surface or , at least , make a curve in ...
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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.