Oxidized Bitumen Grade 75/25
What is Oxidized Bitumen Grade 75/25?
Oxidized Bitumen Grade 75/25 is a type of bitumen which is produced by blowing air through hot bitumen. This process increases the bitumen's softening point and makes it more durable and resistant to temperature changes. The numbers in the name refer to the softening point and penetration values of the bitumen.
The "75" in the name refers to the softening point of the bitumen, which is 75 degrees Celsius. Softening point is the temperature at which bitumen softens and becomes a viscous liquid. The "25" in the name refers to the penetration value of the bitumen, which is 25 decimeters. Penetration value measures the hardness of the bitumen and is defined as the depth (in tenths of a millimeter) to which a standard needle will penetrate vertically into the bitumen sample under specific conditions of loading, time, and temperature.
Oxidized Bitumen Grade 75/25 is commonly used in the production of roofing felt, waterproofing membranes, and sealing compounds. It is also used in the construction of roads, pavements, and airport runways.
Oxidized Bitumen Grade 75/25, also known as blown bitumen, is a type of bitumen produced by blowing air through hot bitumen. This process increases the bitumen's viscosity, softening point, and thermoplastic properties, making it more suitable for a range of applications.
The numbers 75/25 refer to the softening point and penetration values of the oxidized bitumen. The softening point is the temperature at which the bitumen becomes soft enough to deform under a specified load, while penetration is a measure of the bitumen's hardness or stiffness.
In the case of Oxidized Bitumen Grade 75/25, the softening point is 75 degrees Celsius, while the penetration value is 25. This means that the bitumen has a relatively high softening point and low penetration value, making it suitable for use in applications where high stiffness and durability are required, such as roofing, waterproofing, and road construction.
Quality of Oxidized Bitumen Grade 75/25
The quality of Oxidized Bitumen Grade 75/25 is determined by various factors such as its softening point, penetration value, ductility, solubility, and durability. Here are some of the key quality characteristics of this grade of bitumen:
Softening Point: Oxidized Bitumen Grade 75/25 has a softening point of 75°C, which indicates its high resistance to softening at high temperatures.
Penetration Value: The penetration value of this grade of bitumen is 25, which shows its low penetration and high stiffness.
Ductility: The ductility of Oxidized Bitumen Grade 75/25 is an essential factor that determines its suitability for various applications such as road construction and roofing. It has a low ductility due to its high stiffness and viscosity.
Solubility: The solubility of Oxidized Bitumen Grade 75/25 is also an important quality factor. It should have good solubility in solvents such as CS2, indicating its purity and quality.
Durability: The durability of oxidized bitumen is an important consideration for any application. Oxidized Bitumen Grade 75/25 has excellent resistance to weathering, oxidation, and other environmental factors, making it suitable for long-term use.
Overall, Oxidized Bitumen Grade 75/25 is a high-quality bitumen that has excellent stiffness, durability, and resistance to environmental factors. It is commonly used in various applications such as roofing, waterproofing, and road construction.
The quality of Oxidized Bitumen Grade 75/25 depends on several factors such as the source of the bitumen, the manufacturing process, and the storage conditions. Here are some of the quality parameters that are typically used to evaluate the quality of oxidized bitumen:
Softening Point: The softening point of the bitumen should be around 75 degrees Celsius, as specified by the grade.
Penetration Value: The penetration value of the bitumen should be around 25, as specified by the grade.
Ductility: Ductility is the measure of bitumen's ability to stretch without breaking. The ductility of Oxidized Bitumen Grade 75/25 should be at least 5 cm at 25 degrees Celsius.
Fraass Breaking Point: The Fraass Breaking Point is the temperature at which bitumen breaks under specified conditions. The Fraass Breaking Point of Oxidized Bitumen Grade 75/25 should be below -10 degrees Celsius.
Solubility: The bitumen should be soluble in trichloroethylene or tetrachloride, and the solubility should be at least 99%.
Residue on heating: The residue obtained after heating the bitumen to a specified temperature should be less than 0.2%.
Density: The density of the bitumen should be around 1.05-1.15 kg/m3.
These parameters can vary depending on the application and the specific requirements of the end-user, so it is essential to consult the product specifications before using Oxidized Bitumen Grade 75/25.
History of Oxidized Bitumen Grade 75/25
The history of Oxidized Bitumen can be traced back to the early 20th century when the process of air blowing was first introduced to modify the properties of bitumen. The air-blowing process involved passing air through hot bitumen at a specific temperature and pressure to increase its viscosity, softening point, and thermoplastic properties.
Initially, oxidized bitumen was produced in small quantities and used primarily in the construction industry for waterproofing, roofing, and road surfacing. However, the demand for oxidized bitumen increased significantly after World War II, as the construction industry grew rapidly, and new applications for the material emerged.
Over time, various grades of oxidized bitumen were developed to meet the specific requirements of different applications. Oxidized Bitumen Grade 75/25, with a softening point of 75 degrees Celsius and a penetration value of 25, is one of the most widely used grades of oxidized bitumen, primarily in roofing and waterproofing applications
Today, oxidized bitumen is produced in large quantities worldwide, with many companies specializing in its production and supply. The use of oxidized bitumen has expanded beyond the construction industry, and it is now used in various industries, including automotive, electrical, and packaging.
Usages of Oxidized Bitumen Grade 75/25
Oxidized Bitumen Grade 75/25 is a versatile material that is used in various applications, primarily in the construction industry. Here are some of the common usages of Oxidized Bitumen Grade 75/25:
Roofing: Oxidized Bitumen Grade 75/25 is widely used in roofing applications due to its high stiffness and durability. It is used to make roofing membranes, shingles, and other roofing materials.
Waterproofing: Oxidized Bitumen Grade 75/25 is also used in waterproofing applications due to its ability to form a water-resistant barrier. It is used to waterproof foundations, basements, and other below-grade structures.
Road construction: Oxidized Bitumen Grade 75/25 is used in road construction to make asphalt pavements and other road surfacing materials. It provides the necessary stiffness and durability to withstand heavy traffic and extreme weather conditions.
Pipe coatings: Oxidized Bitumen Grade 75/25 is used to coat pipes to protect them from corrosion and other environmental factors.
Electrical applications: Oxidized Bitumen Grade 75/25 is used in electrical applications as an insulating material. It provides excellent electrical insulation properties and can withstand high temperatures.
Adhesives and sealants: Oxidized Bitumen Grade 75/25 is used to make adhesives and sealants due to its thermoplastic properties. It can be melted and applied to various surfaces to form a strong bond or seal.
These are just a few examples of the many applications of Oxidized Bitumen Grade 75/25. Its versatility and durability make it a popular material in various industries.
Packing of Oxidized Bitumen Grade 75/25
Oxidized Bitumen Grade 75/25 is usually packed in various containers to ensure safe transportation and storage. Here are some of the common packing options for Oxidized Bitumen Grade 75/25:
Steel Drums: Oxidized Bitumen Grade 75/25 is commonly packed in 180 kg or 200 kg steel drums. These drums are tightly sealed to prevent any leakage during transportation.
Jumbo Bags: Jumbo bags or FIBC (Flexible Intermediate Bulk Containers) are also used to pack Oxidized Bitumen Grade 75/25. These bags can hold up to 1000 kg of bitumen and are made of strong, tear-resistant materials.
Tankers: In some cases, Oxidized Bitumen Grade 75/25 is transported in bulk using tankers. These tankers have a capacity of up to 25 tons and are designed to prevent any contamination or leakage during transportation.
Meltable Bags: Meltable bags made of special polymer materials are also used to pack Oxidized Bitumen Grade 75/25. These bags can be directly added to the mixing container during the production process, eliminating the need for manual handling and reducing the risk of contamination.
The choice of packing option depends on various factors such as the mode of transportation, storage conditions, and the requirements of the end-user. It is essential to select the appropriate packing option to ensure the quality and integrity of the Oxidized Bitumen Grade 75/25.
Prices of Oxidized Bitumen Grade 75/25
The price of Oxidized Bitumen Grade 75/25 can vary depending on several factors, including the market demand, the global oil prices, and the location of the buyer. Generally, the price of Oxidized Bitumen Grade 75/25 is higher than that of other bitumen grades due to its higher softening point and stiffness.
As of March 2023, the average price of Oxidized Bitumen Grade 75/25 ranges from $400 to $600 per metric ton, depending on the quantity and location of the buyer. However, it is essential to note that the price can vary significantly depending on the market conditions, and buyers should check the current market rates before making a purchase.
It is also worth noting that the cost of transportation and storage can significantly impact the final price of Oxidized Bitumen Grade 75/25. Therefore, it is essential to consider these factors when calculating the total cost of the product.
Delivery time and readiness of Oxidized Bitumen Grade 75/25
The delivery time and readiness of Oxidized Bitumen Grade 75/25 depend on several factors such as the quantity required, the location of the buyer, and the availability of the product. In general, the delivery time can range from a few days to several weeks, depending on these factors.
If the buyer is located near a manufacturing plant or a supplier, the delivery time may be shorter, and the product may be readily available. However, if the buyer is located in a remote area or requires a large quantity, the delivery time may be longer, and the product may need to be produced or imported.
It is always best to check with the supplier or manufacturer regarding the delivery time and readiness of Oxidized Bitumen Grade 75/25. They can provide the most accurate information based on their current inventory and production schedule. Additionally, it is essential to place the order in advance to ensure timely delivery and avoid any delays that may occur due to unforeseen circumstances such as transportation or production issues.
Specifications of Oxidized Bitumen Grade 75/25
Oxidized Bitumen Grade 75/25 is a type of bitumen that is produced by oxidizing bitumen to increase its softening point and improve its durability. Here are the typical specifications of Oxidized Bitumen Grade 75/25:
Softening Point: The softening point of Oxidized Bitumen Grade 75/25 is typically between 75 and 85°C.
Penetration: The penetration of Oxidized Bitumen Grade 75/25 is typically between 20 and 40 dmm.
Ductility: The ductility of Oxidized Bitumen Grade 75/25 is typically between 1 and 5 cm at 25°C.
Loss on Heating: The loss on heating of Oxidized Bitumen Grade 75/25 is typically less than 0.5%.
Solubility: The solubility of Oxidized Bitumen Grade 75/25 in trichloroethylene is typically between 99.5 and 100%.
Flash Point: The flash point of Oxidized Bitumen Grade 75/25 is typically above 250°C.
It is essential to note that the specifications of Oxidized Bitumen Grade 75/25 may vary depending on the production process and the manufacturer. Therefore, it is always best to check with the supplier or manufacturer for the specific specifications of the product. Additionally, the end-user may have specific requirements for the product, and the supplier or manufacturer may need to adjust the specifications accordingly.
Analysis Table of Oxidized Bitumen Grade 75/25
Here is a typical analysis table of Oxidized Bitumen Grade 75/25:
| Property | Analysis |
| Softening point | 75-80°C |
| Penetration at 25°C | 20-30 dmm |
| Ductility at 25°C | 2-5 cm |
| Loss on heating | Less than 1% by weight |
| Drop in softening point | Less than 5°C |
| Solubility in CS2 | Completely soluble |
| Flash point | Above 230°C |
| Density at 25°C | 1.05-1.10 g/cm³ |
| Acidity | Neutral to slightly acidic |
| Ash content | Less than 0.5% by weight |
| Viscosity at 135°C | 8000-14000 poises (80-140 Pa.s) |