Bitumen Oxidized Grade


Oxidized Grade Bitumen

Revolutionizing Construction: The Dynamic Impact of Oxidized Grade Bitumen in Building Tomorrow’s Infrastructure




In the ever-evolving landscape of construction materials, Oxidized Grade Bitumen emerges as a versatile and powerful solution. Also known as Blown Asphalt, this specialized form undergoes a meticulous production process, resulting in a material with enhanced properties. This article explores the production methods, characteristics, types, and diverse applications of Oxidized Grade Bitumen, shedding light on its transformative role in various industries.

Production Process: Crafting Excellence


Oxidized Grade Bitumen is meticulously produced through Continuous or Staggered Blowing Processes. Controlled blowing of Heated Penetration Grade Bitumen with air not only regulates oil content but triggers oxidation, imparting unique properties. Grades are then designated by two numbers, reflecting midpoints of softening points and penetration ranges.


The production process of Oxidized Grade Bitumen is a symphony of controlled transformations. It takes the raw material of Heated Penetration Grade Bitumen and subjects it to the precision of blowing processes. This orchestration, whether continuous or staggered, doesn’t just regulate the oil content; it orchestrates a chemical ballet that transforms ordinary bitumen into a dynamic, rubbery compound. The resulting grades, indicated by specific numerical markers, unlock a spectrum of possibilities for applications in various industries.




Types and Characteristics: The Essence of Oxidized Grade


Oxidized grade bitumen, often referred to as Blown Asphalt, boasts a gel-like structure due to blowing hot air into penetration bitumen. With a higher softening point and penetration index than regular bitumen, it becomes a robust material for diverse applications in the construction industry. The ongoing or Staggered Blowing Process further refines its characteristics, making it a preferred choice for various scenarios.


The gel-like nature of Oxidized Grade Bitumen sets it apart in the construction materials landscape. This unique structure, born from the marriage of air and bitumen, elevates its properties to new heights. The increased softening point, a testament to its thermal resilience, makes it a stalwart choice in applications demanding high temperature resistance. The higher penetration index adds another layer to its versatility, making it stand out from conventional road construction bitumen. The ongoing or staggered blowing process adds finesse to its characteristics, ensuring that each grade carries a distinct imprint, ready to meet the diverse demands of the construction industry.


Blown Bitumen, a subset of Oxidized Grade Bitumen, is produced by blowing air into penetration grade bitumen at elevated temperatures. The resulting material exhibits significantly higher penetration index, making it invaluable in construction applications. The designation of Blown Bitumen corresponds to the midpoint of softening point criteria, a critical parameter measured through ASTM D36.


Oxidized Bitumen Grade 95-25

Applications: Versatility Unleashed


Oxidized Bitumen grades, including the widely used Oxidized Bitumen Grade 95-25, find applications globally. Whether sealing saw cuts and joints with minimal expected movement or addressing high-temperature bleeding concerns, these grades showcase a wide temperature range that makes them indispensable.


The versatility of Oxidized Grade Bitumen unfolds in its diverse applications across the construction spectrum. From serving as a sealant in joints with minimal movements to providing an anti-slip layer in the piling industry, its applications are as varied as the challenges it addresses. The roofing and waterproofing industries benefit from its controlled hardness under specific temperatures, ensuring durability and resilience. Sound dampening felts, undercarriage sealants in the automotive industry, and joint filling compounds all bear the mark of Oxidized Grade Bitumen’s adaptability.


Industrial Insights: From Air-Blowing to Modified Bitumen


The manufacturing process involves air-blowing, a technique used to produce oxidized roofing asphalts. This results in asphalt with enhanced hardness, viscosity, and temperature resistance. Oxidized asphalts find applications in roofing operations, pipe coatings, hydraulic applications, and even the manufacture of paints.


Terms like Blowing Still, Coating Asphalt, and Modified Bitumen add nuances to the spectrum of oxidized bitumen. A Blowing Still, a closed process vessel with a sparger, is integral in the air-blowing process for producing roofing asphalt. Coating Asphalt, whether air-blown or oxidized, plays a vital role in manufacturing roofing materials used in various roofing systems. Modified Bitumen, a roofing system based on membranes, utilizes oxidized asphalt modified with polymers, offering flexibility and durability.


Bitumen - Blown Asphalt - Asphalt

Comparative Advantages and Guidelines



Compared to paving grade bitumen, Oxidized Bitumen exhibits reduced temperature susceptibility, a more ‘solid‘ nature at ambient temperatures, and a high penetration index. These characteristics make it a versatile choice in challenging construction environments.


Oxidized Grade Bitumen stands tall against its counterparts in the world of construction materials. Its reduced vulnerability to temperature variations ensures stability in diverse environmental conditions. At ambient temperatures, it exhibits a more solid nature, reinforcing its durability. The high penetration index adds a layer of adaptability, making it suitable for a wide array of construction scenarios.


Application guidelines emphasize breaking blown grade bitumen into small pieces and heating it slowly to an optimal temperature (220 ºC to 230 ºC). This meticulous process ensures the material’s viscosity and workability during application, unlocking its full potential.


Oxidized Bitumen Grades
Oxidized Bitumen Grades 85/25, 95/25 & 115/15


Conclusion: A Powerful Future


In conclusion, Oxidized Grade Bitumen stands as a powerhouse in the realm of construction materials. Its transformative production processes, diverse types, and versatile applications make it a cornerstone in various industries. From roofing to industrial coatings, Oxidized Bitumen’s unique properties make it not just a material but a powerful solution. As technology advances, the potential of Oxidized Grade Bitumen continues to evolve, further solidifying its role in shaping the future of construction materials.


In the dawning era of construction, Oxidized Grade Bitumen emerges not just as a material but as a dynamic force. Its positive impact on construction, from enhancing durability to providing solutions for temperature-sensitive scenarios, positions it as a game-changer. Yet, navigating its complexities and ensuring optimal application requires a strategic understanding of its characteristics. As we stand at the intersection of tradition and innovation, Oxidized Grade Bitumen paves the way for a robust and resilient future in construction.



Various Standard Specifications Of Oxidized Bitumen:


Standard Specification Of Grade 25/95


Standard Specification Of Grade 75/25


Standard Specification Of Grade 75/35


Standard Specification Of Grade 85/25


Standard Specification Of Grade 85/35


Standard Specification Of Grade 85/40


Standard Specification Of Grade 90/10


Standard Specification Of Grade 90/15


Standard Specification Of Grade 90/40


Standard Specification Of Grade 105/15


Standard Specification Of Grade 105/35


Standard Specification Of Grade 110/30


Standard Specification Of Grade 115/15