Asphalt & Bitumen West Co .

The uses of bitumen

The uses of bitumen

The most amount of bitumen, which is used in the construction industry and road construction, is also used in road and roof pavement. The waterproofness and elasticity at high temperature are two perfect traits of bitumen that makes it ideal for a vast group of uses. It works like an adhesive liquid at high temperatures (normally between 100°_ 200°) and it can get mixed with the other components and get shaped if needed. An ineffective solid material will be remained after cooling down which is tough and hydrophobic (it repels water). Several terms are used to describe normal bitumen such as pavement grade, penetration grade, and pen grade (also known as PG). When they use these terms they usually mean a bitumen that can be produced in an ordinary refinery by relatively simple methods. The refinery processes that are used to produce bitumen and the effect of these processes on final specifications of the product are mentioned in several sources.

What is pure bitumen?

Since the most amount of bitumen that is used in asphalt for road construction is the normal bitumen (pure bitumen), it is mostly known as the asphalt bitumen.

The term "penetration grade" is the short form of bitumen with penetration grade, and it shows the fact that this product is usually classified by the penetration test (in Europe and some parts of Asia). The term "direct extraction” mentions the fact that this type of bitumen directly gets produced by the vacuum distillation process and without further reforms. The available estimations of global bitumen usage are nearly 102 million tons of bitumen in a year (according to Euro Bitumen and Asphalt Institute 2011) and about %85 of the entire amount of produced bitumen is used for road construction and other asphalted areas. Normally, asphalt contains %5 bitumen and the remaining %95 is a mixture of mineral gravels and fine grains like limestone filler.

"Asphalt" is a common term used to describe a large number of road pavement products which contain bitumen and mineral gravels. There are some superseded terms like hot mix asphalt (HMA) and asphalt concrete (AC). In this essay, the term "asphalt" is used in all meanings. The term "asphalt is usually misused in media as the short form of asphalted road.

Sale of export bitumen

Asphalt road pavement is a part of the road that has been used as a connection by coal tar and it's nearly more than 30 years that it isn't used anymore.

Coal tar (bitumen)

%10 of global tar production is used in roof pavement and near %5 of it is used in sealing and insulation at different kinds of building materials like pipe covering, covers protection, connections sealing, and dye preparation.

A vast field of Bitumen uses is shown by the recorded use cases in Europe, matching with regulatory requirements of registration, evaluation, authorization, and Restriction of Chemicals (REACH) that needs to list all the chemical materials and related expenditures.

Bitumen is available in variable grades. Characteristics all around the world are used to describe these grades that meet the needs of applications, the climate, loading conditions, and the final use. They usually are based on some experimental standard methods which define the same properties of each grade; like hardness, viscosity, solubility, and persistence. Bitumen is also is used to produce a mixture or for bedding. In these products, bitumen is usually the major part however they can contain a considerable proportion of other materials in order to meet the needs of final use. These mixtures are classified as kinds of bitumen.

The most common ones are mentioned below (Eurobitume and Asphalt institute 2011).

The soluble bitumen and oil modified bitumen

The soluble bitumen and oil-modified bitumen are two products in which the viscosity of the bitumen is reduced by adding a solvent (usually a hydrocarbon).

Normally, the used solvents are white spirit, materials similar to white oil and petrol. The bitumen products are usually used for dispersal and mixing, in some cases.

Types of soluble bitumen

The modified bitumen

The polymerized-modified bitumens (PMBs) are produced to change the characteristics and function of the directly extracted bitumens Properties like elasticity, adherence, and the durability of adherence. This type of bitumen can be modified by one or more than one chemical substance. These substances may contain polymers, waxes, shredded rubbers, sulfurs, and acids. The modified bitumens have reached different uses by now.

The Emulsion bitumen

The emulsion bitumens are those types of products in which the bitumen particles are outspread in a water phase. Emulsifiers are used to stable the mixture. Bitumen emulsions provide the possibility of transporting and using the bitumen at temperatures which are lower than the temperature of the bitumen and they are usually used for road pavements. You can find more information about bitumen emulsion and the way to use them in the other parts.

Components of emulsion bitumen

What is bitumen?

Introduction of different bitumen experiments

Write us your own point of view