Bituminous Products’ Information

The design and operation of cold asphalt plants are categorized as continuous type and batch type.

Bitumen emulsions are heterogeneous mixtures that often consist of two immiscible liquid phases, bitumen and water, and are stabilized with an emulsifier.

The most amount of bitumen, which is used in the construction industry and road construction, is also used in road and roof pavement.

First let’s look at the etymology and origin of “CE” to be more familiar with its meaning. CE is in fact abbreviated form of French phrase “Conformité Européne” or “Conformity European”.

The ratio of the weight of a substance to its volume is called its specific weight. However, density is the ratio of the mass of a substance to its volume. Density is independent of the gravity acceleration, nevertheless, the specific weight is affected by the gravity acceleration of the earth.

One of the most significant features of asphalt cement is temperature susceptibility that is obtained and evaluated in terms of penetration index (PI). Penetration and softening point tests are used to determine the penetration of asphalts.

Natural asphalt is gradually produced and obtained in natural conditions and free space caused by evaporation and transformation of existed crude oil in the nature by passage of long time (million years).

Hot-mix asphalt is a combination of hot tar and graded fine aggregates and filler which is produced and mixed in asphalt factory in a pre-defined specific situation and heat and is carried, distributed, profiled and crushed on surfaces of base and sub-base or layers of concrete.

Bitumens are divided into different categories based on the production method, compounds, and physical properties, such as penetration bitumen and PG and viscosity (VB) bitumens. In this section, we will review the Viscosity Grade Bitumens.

Some tests are carried out on the bitumen samples among which the following tests could be mentioned:

Hot asphalt recycling implies a set of operations during which the worn-out pavement is first removed from the road surface,