American Highway Engineers' HandbookJohn Wiley & Sons, Incorporated, 1919 - 1658 Seiten |
Inhalt
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Andere Ausgaben - Alle anzeigen
Häufige Begriffe und Wortgruppen
50-foot Arc aggregate altho amount angle asphalt cement average bituminous materials broken stone building carbon disulphide Chord for 50-foot clay coal tar concrete construction cost creosoting oil cross-section curve Def Arc Skew determined diameter distance distillation ditches dust earth roads elevation excavation Feet 25 Ft flux foundation fractional distillation grade gravel gravel road haul highway engineering horizontal hornblende hydrocarbons igneous rocks insoluble intersection less limestone load macadam method mile mineral naphtha naphthalene obtained paraffin pass thru pavement percentage petroleum placed plagioclase pyroxenes quarry Radius Diff refined residue road surface roadway rock roller rolling sample sand sand-clay screen side Skew 100 Feet slope soil specific gravity specific viscosity sq yd street subgrade survey tangent tars temperature thickness thoroly tion traction engine traffic usually vehicles vertical wagons weight width
Beliebte Passagen
Seite 361 - Act at less than the rates, fares, or charges lawfully in effect, shall be deemed guilty of a misdemeanor and. upon conviction thereof, shall be subject for each offense to a fine of not less than $100 and not more than $5,000.
Seite 411 - A RESOLUTION regulating and limiting the height and bulk of buildings hereafter erected and regulating and determining the area of yards, courts and other open spaces, and regulating and restricting the location of trades and industries and the location of buildings designed for specified uses and establishing the boundaries of districts for the said purposes.
Seite 608 - The consistency of a bituminous material expressed as the distance that a standard needle vertically penetrates a sample of the material under known conditions of loading, time and temperature. Where the conditions of test are not specifically mentioned, the load, time and temperature are understood to be 100 g., 5 seconds, and 25° C. (77° F.), respectively, and the units of penetration to indicate hundredths of a centimeter.
Seite 734 - The asphalt cement shall be homogeneous, free from water and shall not foam when heated to 177° C.
Seite 721 - ... the weight of insoluble matter in the crucible. The total weight of insoluble material may include both organic and mineral matter. The former, if present, is burned off by ignition at a red heat until no incandescent particles remain, thus leaving the mineral matter or ash, which can be weighed on cooling. The difference between the total weight of material insoluble in carbon disulphide and the weight of substance taken equals the total bitumen, and the percentage weights are calculated and...
Seite 5 - Solid or semi-solid native bitumens, solid or semisolid bitumens obtained by refining petroleum, or solid or semi-solid bitumens which are combinations of the bitumens mentioned with petroleums or derivatives thereof, which melt upon the application of heat and which consist of a mixture of hydrocarbons and their derivatives of complex structure, largely cyclic and bridge compounds.
Seite 704 - Penetration is defined as the consistency of a bituminous material expressed as the distance that a standard needle vertically penetrates a sample of the material under known conditions of loading, time and temperature.
Seite 722 - ... by means of a large spoon. Care must be taken, however, that the individual particles are not crushed. If a section of pavement is under examination, a piece weighing somewhat over 1 kg may be cut off with hammer and chisel.
Seite 726 - In making the filtration the utmost care should be exercised to avoid stirring up any of the precipitate, in order that the filter may not be clogged and that the first decantation may be as complete as possible. The sides of the flask should then be quickly washed down with naphtha and, when the crucible has drained, the bulk of insoluble matter is brought upon the felt. Suction may be applied when the...
Seite 65 - ... and the excess paste at the smaller end sliced off at the top of the ring by a single oblique stroke of a trowel held at a slight angle with the top of the ring.