Street Pavements and Paving Materials: A Manual of City Pavements : the Methods and Materials of Their ConstructionJohn Wiley & Sons, 1900 - 532 páginas |
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Página 28
... sands that the smallest grains show any great effect of attrition . Sandstone is formed by grains of sand being deposited in beds by some agency and afterwards compacted . The sand proper is almost all quartz , as this mineral is ...
... sands that the smallest grains show any great effect of attrition . Sandstone is formed by grains of sand being deposited in beds by some agency and afterwards compacted . The sand proper is almost all quartz , as this mineral is ...
Página 59
... sand was discovered , followed by more pitch to a depth of 90 feet . From there on to 150 feet the boring was in sand mixed with asphalt . Similar borings made outside of the lake showed the latter formation near the surface , and on ...
... sand was discovered , followed by more pitch to a depth of 90 feet . From there on to 150 feet the boring was in sand mixed with asphalt . Similar borings made outside of the lake showed the latter formation near the surface , and on ...
Página 62
... sand covering an area of about 75 acres for a depth of 25 feet . The maltha is supposed to be sup- plied from a stratum of bituminous shale upon which the sand rests . The sand is covered with from 6 to 8 feet of surface loam which is ...
... sand covering an area of about 75 acres for a depth of 25 feet . The maltha is supposed to be sup- plied from a stratum of bituminous shale upon which the sand rests . The sand is covered with from 6 to 8 feet of surface loam which is ...
Página 63
... sand , sinking to the bottom , is carried away by mechanical means . The maltha flows from the surface of the water through a spout to a tank whence it is pumped into a storage tank of higher elevation . From there it runs into refining ...
... sand , sinking to the bottom , is carried away by mechanical means . The maltha flows from the surface of the water through a spout to a tank whence it is pumped into a storage tank of higher elevation . From there it runs into refining ...
Página 64
... sand by specially devised machinery , and conveying it to a large vat , where it is treated with a form of gasolene specially pre- pared for the purpose from crude petroleum . The gasolene dis- solves the bitumen and , carrying it in ...
... sand by specially devised machinery , and conveying it to a large vat , where it is treated with a form of gasolene specially pre- pared for the purpose from crude petroleum . The gasolene dis- solves the bitumen and , carrying it in ...
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abutting prop Alumina amount asphalt pavement asphaltene asphaltic cement average binder bitumen bituminous rock blocks brick pavement broken stone Brooklyn carbon cent centre chemical City Engineer clay clean coal-tar cobblestone condition construction contract contractor cost course creosote cubic yard curb depth durable entire erty owners expense feet wide feldspar filled foundation grade granite gravel grooved rail grout gutter hard heat hornblende inches inches deep inches thick inches wide iron joints laid Large 12mo less lime limestone macadam ment method miles mineral mixed mixture mortar obtained oxide paving material paving-brick paving-cement petroleum placed Portland cement practically proper quantity quartz rail rammed repairs road roadway rock asphalt rolling sand sandstone screenings shows sidewalk Silica smooth specific gravity square inch square yard street street-car strength subgrade TABLE temperature tion track traffic trap-rock wearing surface width York York City
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Página 418 - ... any improper materials used in its construction, or by or on account of any act or omission of the said Contractor or his agents...
Página 539 - Factories 16mo, mor. 1 50 * Muir's History of Chemical Theories and Laws 8vo, 4 00 Mulliken's General Method for the Identification of Pure Organic Compounds. VoL I. Compounds of Carbon with Hydrogen and Oxygen. Large 8vo, 5 00 Vol. II. Nitrogenous Compounds. (In Preparation.) Vol. III. The Commercial Dyestuffs Large 8vo, 5 00 * Nelson's Analysis of Drugs and Medicines 12mo, 3 00 Ostwald's Conversations on Chemistry.