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 30
... temperature of from 1200 ° to 1400 ° F. its color changed to a dull red , and the piece was slightly checked and its strength impaired . Stone very similar to the Hudson River variety is found in Luzerne County , Penn . A sample of this ...
... temperature of from 1200 ° to 1400 ° F. its color changed to a dull red , and the piece was slightly checked and its strength impaired . Stone very similar to the Hudson River variety is found in Luzerne County , Penn . A sample of this ...
Página 45
... temperature , pressure , the nature of the neighboring rocks , the epoch of its operation , and the original material , the product differing in form , appearance , composition , and properties . But the mode of forma- tion has been the ...
... temperature , pressure , the nature of the neighboring rocks , the epoch of its operation , and the original material , the product differing in form , appearance , composition , and properties . But the mode of forma- tion has been the ...
Página 47
... temperatures , but at pressures that may or may not have been high . " Mr. Day placed a number of fresh herring , a quantity of pine sawdust , and a number of pieces of fat pine wood in a cylindrical iron retort and distilled it . Of ...
... temperatures , but at pressures that may or may not have been high . " Mr. Day placed a number of fresh herring , a quantity of pine sawdust , and a number of pieces of fat pine wood in a cylindrical iron retort and distilled it . Of ...
Página 48
... temperature . " The change is thus described : " The first department of the process consists in the formation of a black oily substance similar to what arises in a liquid form at the surface , and has been termed asphaltic oil . This ...
... temperature . " The change is thus described : " The first department of the process consists in the formation of a black oily substance similar to what arises in a liquid form at the surface , and has been termed asphaltic oil . This ...
Página 49
... temperatures . He states that asphalt is being formed now , not as a primary but as a secondary product , resulting from the transformation of lighter forms of bitumen , maltha , or even thinner oils into harder bitumen by condensation ...
... temperatures . He states that asphalt is being formed now , not as a primary but as a secondary product , resulting from the transformation of lighter forms of bitumen , maltha , or even thinner oils into harder bitumen by condensation ...
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abutting prop Alumina amount asphalt pavement asphaltene asphaltic cement average barrels Belgian binder biotite bitumen bituminous rock blocks brick pavement broken stone Brooklyn carbon centre chemical City Engineer clay clean coal-tar cobblestone condition construction contractor cost creosote cubic yard curb deposit depth durable entire erty owners feet feldspar filled flux foundation grade granite gravel grout gutter hard heat hornblende inches inches deep inches thick inches wide iron joints laying less lime limestone macadam Magnesia ment method miles mineral mixed mixture mortar obtained oxide paving material paving-brick paving-cement petrolene petroleum Portland cement pounds practically proper quantity quartz rail rattler repairs road roadway rock asphalt rolled samples sand sandstone shows Silica smooth specific gravity square inch square yard street street-car strength subgrade TABLE temperature tion track traffic trap-rock vary vitrified wearing surface width wood pavements 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.