| 释义 |
asphalt
as·phalt A0467100 (ăs′fôlt′)n.1. See bitumen.2. A mixture of bitumen with crushed stone gravel or sand, used for paving or roofing.tr.v. as·phalt·ed, as·phalt·ing, as·phalts To pave or coat with asphalt.
[Middle English aspalt, from Medieval Latin asphaltus, from Greek asphaltos.]
as·phal′tic adj.asphalt (ˈæsfælt; ˈæʃ-; -fɔːlt) n1. (Elements & Compounds) any of several black semisolid substances composed of bitumen and inert mineral matter. They occur naturally in parts of America and as a residue from petroleum distillation: used as a waterproofing material and in paints, dielectrics, and fungicides2. (Elements & Compounds) a mixture of this substance with gravel, used in road-surfacing and roofing materials3. (Elements & Compounds) (modifier) containing or surfaced with asphaltvb (General Engineering) (tr) to cover with asphalt[C14: from Late Latin aspaltus, from Greek asphaltos, probably from a-1 + sphallein to cause to fall; referring to its use as a binding agent] asˈphaltic adjas•phalt (ˈæs fɔlt; esp. Brit. -fælt)
n., v. -phalt•ed, -phalt•ing. n. 1. any of various natural or synthetic, dark-colored, bituminous substances, composed mainly of hydrocarbon mixtures. 2. a mixture of such substances with gravel, crushed rock, or the like, used for paving. v.t. 3. to cover or pave with asphalt. [1275–1325; Middle English aspaltoun « Greek ásphaltos, -on] as•phal′tic, adj. as′phalt•like`, adj. as·phalt (ăs′fôlt′) A thick, sticky, dark-brown mixture of petroleum tars used in paving, roofing, and waterproofing. Asphalt is produced as a by-product in refining petroleum or is found in natural beds.asphalt - Its synonyms are mineral pitch, Jews' pitch, and slime.See also related terms for slime.asphalt
Past participle: asphalted
Gerund: asphalting
| Present |
|---|
| I asphalt | | you asphalt | | he/she/it asphalts | | we asphalt | | you asphalt | | they asphalt |
| Preterite |
|---|
| I asphalted | | you asphalted | | he/she/it asphalted | | we asphalted | | you asphalted | | they asphalted |
| Present Continuous |
|---|
| I am asphalting | | you are asphalting | | he/she/it is asphalting | | we are asphalting | | you are asphalting | | they are asphalting |
| Present Perfect |
|---|
| I have asphalted | | you have asphalted | | he/she/it has asphalted | | we have asphalted | | you have asphalted | | they have asphalted |
| Past Continuous |
|---|
| I was asphalting | | you were asphalting | | he/she/it was asphalting | | we were asphalting | | you were asphalting | | they were asphalting |
| Past Perfect |
|---|
| I had asphalted | | you had asphalted | | he/she/it had asphalted | | we had asphalted | | you had asphalted | | they had asphalted |
| Future |
|---|
| I will asphalt | | you will asphalt | | he/she/it will asphalt | | we will asphalt | | you will asphalt | | they will asphalt |
| Future Perfect |
|---|
| I will have asphalted | | you will have asphalted | | he/she/it will have asphalted | | we will have asphalted | | you will have asphalted | | they will have asphalted |
| Future Continuous |
|---|
| I will be asphalting | | you will be asphalting | | he/she/it will be asphalting | | we will be asphalting | | you will be asphalting | | they will be asphalting |
| Present Perfect Continuous |
|---|
| I have been asphalting | | you have been asphalting | | he/she/it has been asphalting | | we have been asphalting | | you have been asphalting | | they have been asphalting |
| Future Perfect Continuous |
|---|
| I will have been asphalting | | you will have been asphalting | | he/she/it will have been asphalting | | we will have been asphalting | | you will have been asphalting | | they will have been asphalting |
| Past Perfect Continuous |
|---|
| I had been asphalting | | you had been asphalting | | he/she/it had been asphalting | | we had been asphalting | | you had been asphalting | | they had been asphalting |
| Conditional |
|---|
| I would asphalt | | you would asphalt | | he/she/it would asphalt | | we would asphalt | | you would asphalt | | they would asphalt |
| Past Conditional |
|---|
| I would have asphalted | | you would have asphalted | | he/she/it would have asphalted | | we would have asphalted | | you would have asphalted | | they would have asphalted |
Thesaurus| Noun | 1. |  asphalt - mixed asphalt and crushed gravel or sand; used especially for paving but also for roofingpaving, paving material, pavement - material used to pave an area | | 2. |  asphalt - a dark bituminous substance found in natural beds and as residue from petroleum distillation; consists mainly of hydrocarbonsmineral pitchmineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition | | Verb | 1. |  asphalt - cover with tar or asphalt; "asphalt the driveway"pave - cover with a material such as stone or concrete to make suitable for vehicle traffic; "pave the roads in the village" |
Translationsasphalt (ˈӕsfӕlt) , ((American) -fo:lt) noun, adjective (of) a mixture containing tar, used to make roads, pavements etc. The workmen are laying asphalt; an asphalt playground. 瀝青，瀝青的 沥青，沥青的 IdiomsSeeasphalt jungleasphalt
asphalt (ăs`fôlt, –fălt), brownish-black substance used commonly in road making, roofing, and waterproofing. Chemically, it is a natural mixture of hydrocarbons. It varies in consistency from a solid to a semisolid, has great tenacity, melts when heated, and when ignited will burn with a smoky flame leaving very little or no ash. It is found in nature in deposits called asphalt lakes. Natural asphalt was probably formed by the evaporation of petroleum. Asphalt is obtained as a residue in the distillation or refining of petroleum. This is its important commercial source. It occurs also in asphalt rock, a natural mixture of asphalt with sand and limestone, which when crushed is used as road-building material. Asphalt is also used in the manufacture of paints and varnishes, giving an intensely black color.AsphaltA mixture of bitumens obtained from native deposits or as a petroleum by-product used for paving, waterproofing, and roofing applications.Asphalt a resin; a distinction is made between natural and artificial asphalts. Natural asphalt is formed from petroleum as a result of the evaporation of light fractions and of oxidation under the influence of hypergenesis. The petroleum first changes into thick and highly viscous maltha, then into hard and easily fusible asphalt. Further change in natural asphalt usually leads to the formation of asphaltite. Sometimes natural asphalt forms a fairly thick crust on the surface of large petroleum lakes (such as the asphalt lake on the island of Trinidad). Natural asphalt is widespread in regions where oil-bearing rocks occur on or not far below the earth’s surface. Natural asphalt usually fills crevices and caverns in limestone, dolomite, and other rocks. Its content in rocks varies from 2–3 to 20 percent by mass. Large natural-asphalt deposits in the USSR are located in Kuibyshev and Orenburg oblasts and in the Komi ASSR. Elsewhere, they are found in the oil-bearing regions of Venezuela, France, Jordan, Canada, and Israel. Artificial asphalt is a mixture of bitumens (13–60 percent) with finely pulverized mineral fillers (chiefly limestone). It differs from natural asphalt by the presence of paraffin (up to a few percent) and by a significantly greater content of petroleum oils. The most important areas of application for asphalt are in road-building and in construction. When applied, asphalt is usually mixed with sand, gravel, or crushed rock (forming asphalt mastic) for building floors, sidewalks, and road surfaces; for waterproofing; and for other uses. Asphalt mastic is a component of asphalt concrete. Artificial asphalt is also used in electrical engineering as an insulating material and in the production of roofing paper, plastering materials, glue, asphalt lacquers, and other products. REFERENCESOsnovy geneticheskoi klassifikatsii bitumov. Leningrad, 1964.
Kostrin, K. V. Pochemu neft’ nazyvaetsia neft’iu. Moscow, 1967.asphalt[′a‚sfȯlt] (materials) A brown to black, hard, brittle, or plastic bituminous material composed principally of hydrocarbons; formed in oil-bearing rocks near the Dead Sea, and in Trinidad; prepared by pyrolysis from coal tar, certain petroleums, and lignite tar; melts on heating; insoluble in water but soluble in gasoline; used for paving and roofing and in paints and varnishes. asphalt1. A dark brown to black cementitious material, solid or semisolid, in which the predominating constituents are bitumens which occur in nature. 2. A similar material obtained artificially in refining petroleum; used in built-up roofing systems as a waterproofing agent. 3. A mixture of such substances with an aggregate for use in paving.asphalt1. any of several black semisolid substances composed of bitumen and inert mineral matter. They occur naturally in parts of America and as a residue from petroleum distillation: used as a waterproofing material and in paints, dielectrics, and fungicides 2. a mixture of this substance with gravel, used in road-surfacing and roofing materials EncyclopediaSeea/pasphalt
Synonyms for asphaltnoun mixed asphalt and crushed gravel or sandRelated Words- paving
- paving material
- pavement
noun a dark bituminous substance found in natural beds and as residue from petroleum distillationSynonymsRelated Wordsverb cover with tar or asphaltRelated Words |