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Asphalt Paving Methods and Materials

9 Pages 2373 Words June 2019

turally occurring Bitumen mixture has organic compounds that dissolve and mix within the mixture, but pavement material Asphalt mixture is generally synthetically made with the help of organic and inorganic additives to the Bitumen (Bahia, 1993).
The composition of Asphalt is such that it has been used around the world for thousands of years for multiple different purposes. Asphalt can be used as an adhesive due to its properties which allow substances to stick to each other, and can also be used in building and construction etc. (Krishnan, n.d). Paving is one of the main significant modern-day uses of Asphalt, and this paper will largely deal with the mixtures and types of Asphalt that are used as paving materials.
Two of the main types of asphalt available in the market are petroleum refined asphalt that is extracted during the distillation of long chained hydrocarbons and the tar obtained from the destructive distillation of the soft coal (Bahia, 1993). Although rock asphalt is readily available in abundance in some places, the aforementioned types are most widely used for paving purposes. However, it is worth mentioning that all the types of asphalt are different, both in nature and in chemistry. Where petroleum asphalt contains high amount of bitumen soft coal, tar is a lot less dependent on the constituent. For ease of understanding, analysis, and use, asphalt aggregates that are used for paving are classified into various class depending on the source and means of preparation. The desirable properties play an important role in the aggregate preparation as well.
While Asphalt and Bitumen largely mean the same thing, for the purpose of this paper, Asphalt will be used to refer to the mixture of Bitumen, and Bitumen will be used to refer to the heaviest naturally occurring fraction of petroleum.

Materials description
Asphalt contains, in abundance, bitumen, as has been mentioned before. Bitumen is one of the main and most integr...

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