|
Visit our new topic page about
asphalt
|
asphalt
The Columbia Encyclopedia, Sixth Edition | Date: 2008
asphalt , 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.
Author not available, ASPHALT.,
The Columbia Encyclopedia, Sixth Edition 2008
The Columbia Encyclopedia, Sixth Edition. Copyright 2008 Columbia University Press
Related newspaper, magazine, and journal articles from HighBeam Research
|
Asphalt modified by SBS triblock copolymer: structures and properties.
Polymer Engineering and Science; 6/1/1996; Adedeji, A. Grunfelder, T. Bates, F.S. Macosko, C.W. Stroup-Gardiner, M. Newcomb, D.E.; 6151 words
; INTRODUCTION One of the primary uses for asphalt is in road construction. A typical road ... stone aggregates surrounded by a matrix of asphalt binder ([approximately]5 wt%). The performance ... is controlled by the properties of the asphalt cement since asphalt is the continuous ...
Read more
|
|
Inhalation exposure of rats to asphalt fumes generated at paving temperatures alters pulmonary xenobiotic metabolism pathways without lung injury.(Research)
Environmental Health Perspectives; 7/1/2003; Ma, Jane Y.C. Rengasamy, Apavoo Frazer, Dave Barger, Mark W. Hubbs, Ann F. Battelli, Lori Tomblyn, Seith Stone, Samuel Castranova, Vince; 8085 words
; Asphalt fumes are complex mixtures of various organic compounds ... alterations of pulmonary xenobiotic pathways in rats exposed to asphalt fumes by inhalation. Rats were exposed at various doses and time periods to air or to asphalt fumes generated at paving temperatures. To assess the acute ...
Read more
|
|
Modified asphalt mixtures resistance to permanent deformations/ Modifikuotu asfalto misiniu atsparumas liekamosioms deformacijoms.(Technical report)
Journal of Civil Engineering and Management; 12/1/2007; Radziszewski, Piotr; 6823 words
; ... the form of ruts, are one of the basic asphalt pavement damages impairing its service properties. Application of appropriate asphalt mixtures and binder modification are effective methods for improving asphalt courses resistance. While being manufactured ...
Read more
|
|
Asphalt: Price Reduction in 1998 and Drastic Import Increase in 1999.
China Chemical Reporter; 10/26/1999; 1550 words
; The asphalt market in China in 1998 featured slack ... lasted for nearly 8 months. The domestic asphalt market shifted from a seller's market to ... became the three deciding factors of the asphalt market share in 1998. These three factors ...
Read more
|
|
|
Thermal and rheological properties of maleated polypropylene modified asphalt.
Polymer Engineering and Science; 8/1/2005; Yeh, Pei-Hung Nien, Yu-Hsun Chen, Jean-Hong Chen, Wei-Chyum Chen, Jian-Shiuh; 3465 words
; ... The limitations to the applications of asphalt binder in the paving industry are due ... of the corresponding polymer modified asphalt (PMA), the added material must increase ... without increasing expense. Modifiers to asphalt cements have been used in pavement technology ...
Read more
|
|
|
Improved properties of SBS-modified asphalt with dynamic vulcanization.(Abstract)
Polymer Engineering and Science; 5/1/2002; Wen, Guian Zhang, Yong Zhang, Yinxi Sun, Kang Fan, Yongzhong; 4348 words
; INTRODUCTION The use of SBS as an asphalt modifier was developed by the Shell Chemical ... and rheological behavior of conventional asphalt compositions can be improved by the addition ... become usable for extensive applications in asphalt modification. With the modification of ...
Read more
|
|
Laboratory investigation of the properties of asphalt and its mixtures modified with flame retardant.
Construction and Building Materials; 6/1/2008; Cong, Peiliang Yu, Jianying Wu, Shaopeng Luo, Xiaofeng; 4099 words
; ... study was to evaluate the properties of asphalt and its mixtures modified with Decarbomodiphenyl ... on physical and chemical properties of asphalt binders. The pavement performances of flame retardant modified asphalt mixture were estimated by Marshall stability ...
Read more
|
|
|
Feasibility study of asphalt-modified mortars using asphalt emulsion.
Construction and Building Materials; 6/1/2006; Song, Hun Do, Jeongyun Soh, Yangseob; 2424 words
; Abstract Asphalt emulsion is manufactured by emulsification of asphalt, and it is an energy-saving, ecologically safe material ... study is to evaluate the feasibility on the use of an asphalt emulsion as a polymeric admixture. Asphalt-modified ...
Read more
|
|
Asphalt rubber: potential for tougher roads. (road construction materials; includes related articles) (Asphalt and Concrete '91)
Construction Equipment; 2/15/1991; Moore, Walt; 1788 words
; Asphalt Rubber: Potential for Tougher Roads In the early 1960s ... McDonald tried combining ground rubber from old tires with hot asphalt. He reasoned that rubber's flexibility, along with the ... years later, the city of Phoenix is still using McDonald's asphalt rubber --a testament perhaps to the materials's ...
Read more
|
|
|
Prediction of high temperature rheological properties of aged asphalts from the flow data of the original unaged samples.
Construction and Building Materials; 12/1/2002; Shenoy, Aroon; 5131 words
; Abstract Aging of asphalt has implications during the construction ... and their long-term performance. The asphalt binder is known to stiffen during the ... Rheological characterization of the aged asphalts is carried out to get a measure of the ...
Read more
|
Related entries from encyclopedias, dictionaries, and thesauruses
|
Asphalt Cement
How Products Are Made
... served to greatly expand the asphalt industry. Modern petroleum asphalt has the same durable qualities as naturally occurring asphalt, with the added advantage ... to a uniform condition free from organic and mineral ... Most of the petroleum asphalt produced today is used ... an excellent ...
Read more
|
|
|
Asphalt Paver
How Products Are Made
Asphalt Paver Background An asphalt paver is a machine used to distribute, shape, and partially compact a layer of asphalt on the surface of a roadway, parking lot, or other area. It is sometimes called an asphalt-paving machine. Some pavers are ...
Read more
|
|
SIC 2951 Asphalt Paving Mixtures and Blocks
Encyclopedia of American Industries
SIC 2951 ASPHALT PAVING MIXTURES AND BLOCKS This category describes companies principally employed in manufacturing asphalt and tar paving mixtures and paving blocks made of asphalt mixed with other materials. NAICS Code(s) 324121 ...
Read more
|
|
|
SIC 2952 Asphalt Felts and Coatings
Encyclopedia of American Industries
SIC 2952 ASPHALT FELTS AND COATINGS This category is comprised of establishments that manufacture asphalt in roll or shingle form — either ... coatings. Examples of products include asphalt brick siding, tar coating compounds, roofing ...
Read more
|
|
The Asphalt Jungle
International Dictionary of Films and Filmmakers
THE ASPHALT JUNGLE USA, 1950 Director: John Huston ... Script: Maddow, Ben, and John Huston, The Asphalt Jungle , Carbondale, Illinois, 1980. Books ... 23, no. 4, Winter 1996. * * * With The Asphalt Jungle , John Huston laid down the definitive ...
Read more
|