60/70 bitumen is obtained by performing aeration process of vacuum baton in the distillation tower of this company so that its permeability in the laboratory and execution time is between 60 to 70. This product is used to produce asphalt in the road construction industry and is classified as a medium-permeability road bitumen that is suitable for temperate regions. Varziran Company is one of the important exporters of this product to different countries. For more information about Market size of bitumen in recent years, visit our site.
Which grade of bitumen is hardest?
Long-term studies have shown that in order for an asphalt surface to reach its designed service life, the bitumen must not be too hard during hot storage, including the asphalt production process or road surface service. Bitumen, like many polymeric materials, is affected by the presence of oxygen, ultraviolet radiation, and temperature changes. These external factors cause the bitumen to harden, resulting in a decrease in the penetration point and an increase in the softening point, and usually an increase in the penetration index occurs. In recent years, the phenomenon of bitumen hardening and therefore hardening of asphalt mixtures has been studied as a useful phenomenon in asphalt layers because it increases the hardness of materials and thus increases the load-bearing capacity in the structure. This hardening is known as “curing” and is believed to increase the life of asphalt.
In surface layers where the material is in contact with the environment, the hardening of the bitumen can have destructive properties on its performance and can lead to erosion and cracking. This effect is referred to as “hardening”, when the term hardening is used, it means that changes in the properties of bitumen are harmful to the life of the surface layers.
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 the bitumen to the minerals and is a function of the tendency of the bitumen to seep into the pores of the minerals. Even mixed bitumens are used in the preparation of emulsions. Traditional bitumens are usually difficult to emulate, and on the other hand, the use of such emulsions is more industrial. However, emulsions made from bitumen with a penetration of 210/190 or 320/280 are widely used in road construction. Dear customers and traders, for more information about bitumen price per ton, please refer to the website of our sales company.
Bitumen Market size in recent years
bitumen sellers must use suitable bitumen to prepare quality asphalt. One of the most important points in selecting bitumen is the suitability of this material with the climatic conditions of that region, so that due to the vast area of the country, which includes different climatic regions, it is necessary to conduct a comprehensive study both in the field of laboratory and information. Meteorological statistics to be performed in the country. Unfortunately, less attention is paid to this point and the bitumens used in different parts of the country are usually not much different from each other, and this reduces the efficiency of paving. For more information about Bitumen Market size in recent years, please visit our website.
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