The most frequent type of substance that is utilized in the process of constructing roads is a bituminous binder and it is constantly modified by many additives to enhance its properties. Crumb Rubber is one of the widely used modifiers. Crumb rubber modified bitumen, abbreviated as "CRMB," is produced by fusing together a crumb rubber modifier with the bitumen grade of one's choosing. The modifier acts as an agent that prevents any deformation of the binder from taking place, whether that deformation is the result of low temperature, fatigue, or thermal difficulties. In fact, rubber that has been recycled and created from the scraping of tires from automobiles and trucks is called "crumb rubber." During the course of the recycling process for these rubber scraps, the steel and tire cord (fluff) are separated out, and the resulting tire rubber has the consistency of granules. Tire buffing (also known as shredded rubber), which is a result of tire retreading, and scrap tire rubber are the two principal feedstocks that are used in the production of crumb rubber. CRMB is advantageous because, in comparison to applying a conventional bitumen modifier, its use extends the life of a road by a factor of 1.5 to 2 times. 
Our CRMB offers several features that aren't found in other binders like bitumen, such as a strong adhesion that cuts down on cracking, deformation, and other problems. This results in an increase in the material's stability as well as homogeneity throughout the supply chain. It has high resilience to fatigue, is highly cost-efficient, has great resistance to thermal and changing temperature cracking, and provides an excellent experience in harsh climates. Crumb rubber modified bitumen. Additionally, the aging process can be slowed down by combining bitumen and rubber, which leads to an increased lifespan. Due to the hard grade of asphalt that is created, CRM provides protection against water damage. The purpose of adding crumb rubber modifier (CRM) to asphalt mixtures is to improve the properties of the binder by reducing the binder's inherent temperature susceptibility. When the CRM particles interact with the asphalt binder, the CRM particles absorb a portion of the oils in the asphalt binder, and the particles swell, which results in an increase in the viscosity and stiffness of the CRM binder. However, the performance qualities of CRM binders in hot mix asphalt (HMA) pavement are thought to be uncertain due to the varied interaction effects of CRM with asphalt binders. These interaction effects vary based on the percentage of CRM, the source of the CRM, and the size of the CRM. 
modified bitumen
Bitumen is a non-crystalline solid or viscous material that can be black or dark brown in color. Since pure bitumen is not suited for modern roads and the volume of traffic that exists today, engineers have been compelled to manufacture modified bitumen in order to improve the material's performance while it is in operation. The improved binder is more stable under heavy loads, braking, and accelerating pressures, and displays increased resistance to permanently deforming in hot weather. Additionally, the binder is more resistant to permanent deformation in cold weather. It can withstand fatigue stresses and has stronger adhesion between aggregates and binders than other materials. There is a convoluted connection between the chemical structure of bitumen, the structure of bituminous colloid, and the rheological and physical characteristics of bitumen. Any substance that alters the chemical structure of bitumen will also alter the properties of bitumen, and as a result, that substance has the potential to act as a modifier of bitumen. 
In an ideal world, modified bitumen has more adhesion than pure bitumen, lower thermal sensitivity in the range of service temperatures, and sufficient viscosity when it is heated to the temperature at which it will be executed. In addition to this, its sensitivity to the time of loading is low, and it possesses good resistance to plastic deformation, fatigue, and cracks caused by cryogenic temperatures. In the end, the traits that it has after being aged are useful for execution and service. The properties of bitumen can be altered in a variety of ways, including physically, chemically, and in other ways.Rubbers stand out as the most desirable option among the wide variety of polymers that can be utilized in the process of bitumen modification, which includes thermoplastics, thermosets, and thermoplastic elastomers. Rubbers are preferred as bitumen modifiers despite the fact that thermoplastic elastomers like styrene-butadiene-styrene triblock copolymer (SBS) or its hydrogenated forms and elastomers like ethylene-vinyl acetate copolymer (EVA) are also effective bitumen modifiers. This is because rubbers are more affordable. In point of fact, bitumen is expected to maintain the same physical and rheological properties across a wide range of service temperatures and loading situations. Furthermore, at a mixing temperature of 165 degrees Celsius, bitumen is meant to change into a low-viscosity Newtonian fluid. The term "perfect bitumen" refers to this specific kind of bitumen. Rubbery behavior is characterized by the maintenance of constant rheological properties across a broad temperature range. 
The conclusion that may be drawn is that rubbers should have a good chance of modifying the characteristics of bitumen. Because of this, a wide variety of rubbers were incorporated into bitumen (PBR, SBR and its latex, ground tire rubber, etc.) In the process of chemical alteration, many additives were utilized, including organometallic compounds, sulfur, and lignin. In order to alter the properties of pure bitumen, the chemical agent was utilized in this process as an addition. Chemical modification of bitumen has not been marketed to the same extent as physical modification because of the relatively complicated structure of bitumen. In conclusion, it can be said that each modifier has its own additions that serve as the modifier agent. There is a wide variety of different materials that can be mixed with bitumen to increase the performance of the two substances when used as a paving material. Rubbers are favored over other potential bitumen modifiers because of the lower cost of rubbers and the greater availability of rubbers. Nevertheless, the user or the business chooses which modifier to employ in a given situation. If you require any further information or for any further questions and concerns regarding bitumen purchase. feel free to contact us. our sales managers will respond to you as soon as possible and provide you with any help that you need.