Bitumen Suppliers 2020 on the market use different types of bitumen in nature, which is obtained by the gradual conversion of crude oil and the evaporation of its volatiles over many years. Such bitumen is called natural bitumen and its durability is longer than oil bitumen. Such bitumen may be present in pure form in nature (lake bitumen), such as Behbahan Bitumen Lake in Iran and Tirinidad Lake in the United States, or it may be mined.
Which grade of bitumen is hardest?
The tendency of bitumen to harden under atmospheric conditions has been known and studied for many years. All fifteen factors affecting the aging of bitumen are defined.
Bitumen oxidizes slowly when in contact with atmospheric oxygen. Oxygen-containing polar groups are formed, and they tend to aggregate in micelles with higher micelle weights, thus increasing the viscosity of the bitumen. The polar groups of hydroxyl, carbonyl, and carboxyl are formed, leading to more complex and larger molecules that harden the bitumen and reduce its flexibility. The amount of oxidation strongly depends on the temperature, time and thickness of the bitumen layer. At temperatures above 100 ° C, the oxidation rate doubles for every ten degrees of temperature increase. Hardening due to oxidation for a long time is considered as the main cause of bitumen aging so that other factors are less considered. However, it has been shown that although other factors are less important than oxidation, they are measurable.
Loss of volatiles
The evaporation of volatiles depended mainly on the temperature and conditions to which the bitumen was exposed. Penetration grade or pen grade is relatively non-volatile and therefore the amount of hardening due to loss of volatiles is relatively low for them.
Physical hardening or molecular structure
Physical hardening occurs when bitumen is at ambient temperature and has been attributed to the reorientation of bitumen molecules and the slow crystallization of wax. Due to heating, physical hardness can be restored and the main viscosity of bitumen will be achieved.
This phenomenon is easily reconstructed by measuring the penetration of bitumen samples in the laboratory (without reheating) over a period of time. The sample penetration time decreases.
Exudative hardening
Exudative hardening is caused by the movement of oily compounds that seep from bitumen to minerals and is a function of the tendency of bitumen to seep into the pores of minerals. For more information about bitumen price per ton visit our company website.
Main suppliers of bitumen in 2020
Bitumen is the most important raw material used in building bitumen and bitumen sellers use bitumen for building and building insulation, which is very important quality of building bitumen if the bitumen used in building bitumen is not high quality and standard bitumen or bitumen If the miscellaneous sale has been purchased, it will shorten the life of the gypsum and reduce the subsequent damages and re-destruction of the gyro areas. Therefore, our company is one of the main suppliers of bitumen in 2020 and they offer this product to the market at an affordable price.
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