Penetration Bitumen 35/50

How is Penetration Bitumen 35/50 Produced? Its Uses, Applications, Advantages & Disadvantages, and Price Factors

Penetration bitumen, also known as penetration grade bitumen, is a fundamental material used in road construction, roofing, and other industrial applications. The penetration grade bitumen 35/50 is one of the various grades classified based on the hardness and consistency of bitumen. This blog delves into the production process, uses, applications, advantages, disadvantages, and price factors of penetration bitumen 35/50. Peak Universal Business is highlighted as a reliable supplier, ensuring high-quality bitumen products for diverse needs.

What is Penetration Bitumen 35/50?

Penetration bitumen 35/50 is a type of bitumen characterized by its penetration value, which measures the depth (in tenths of a millimeter) that a standard needle penetrates the bitumen sample under specific conditions. The penetration range of 35 to 50 indicates the hardness and viscosity of this grade of bitumen, making it suitable for various applications requiring durable and resilient material.

Production Process of Penetration Bitumen 35/50

The production of penetration bitumen 35/50 involves several stages, each critical to achieving the desired properties of the final product. Here’s a detailed look at the production process:

  1. Crude Oil Selection: The production begins with the selection of suitable crude oil. Not all crude oils are suitable for producing high-quality bitumen. The selected crude oil should have a high content of asphaltenes and resins, which are essential for the desired properties of bitumen.
  2. Distillation: The crude oil undergoes atmospheric distillation, where it is heated and separated into different fractions based on boiling points. The lighter fractions, such as gasoline and diesel, are separated, leaving behind the heavier fractions.
  3. Vacuum Distillation: The heavier fractions are then subjected to vacuum distillation. This process further refines the heavy fractions to produce vacuum residue, the primary raw material for bitumen production.
  4. Blowing Process: The vacuum residue is processed in an air-blowing unit, where it is heated and blown with air. This process, known as oxidation or blowing, increases the viscosity and modifies the properties of the bitumen. For penetration bitumen 35/50, the blowing process is carefully controlled to achieve the desired penetration value and other specifications.
  5. Cooling and Storage: After the blowing process, the bitumen is cooled and stored in heated storage tanks. It is then ready for packaging and transportation.

Uses of Penetration Bitumen 35/50

Penetration bitumen 35/50 is widely used in various industries due to its excellent binding and waterproofing properties. Some of the primary uses include:

  1. Road Construction: It is used as a binder in asphalt concrete for road construction, providing durability and resistance to weathering.
  2. Roofing: Bitumen 35/50 is used in roofing applications, such as in the production of bituminous membranes and shingles, offering waterproofing and weather resistance.
  3. Waterproofing: It is employed in various waterproofing applications for buildings, bridges, and other structures.
  4. Industrial Applications: Penetration bitumen 35/50 is used in industrial applications, including the production of bituminous paints, coatings, and adhesives.

Applications of Penetration Bitumen 35/50

1. Road Construction

  • Asphalt Concrete: Penetration bitumen 35/50 is used as a binder in asphalt concrete mixtures for road construction. Its excellent adhesion and cohesion properties ensure a durable and resilient pavement structure.
  • Surface Dressing: It is used in surface dressing applications to provide a protective layer on roads, enhancing skid resistance and extending the lifespan of the pavement.
  • Base and Sub-Base Layers: Bitumen 35/50 is used in the construction of base and sub-base layers in roadways, providing structural integrity and stability.

2. Roofing

  • Bituminous Membranes: It is used in the production of bituminous membranes for flat and low-slope roofing systems. These membranes offer excellent waterproofing and protection against environmental factors.
  • Shingles: Bitumen 35/50 is used in the manufacture of bituminous shingles for pitched roofs, providing weather resistance and durability.
  • Roof Coatings: It is used in roof coatings to enhance the waterproofing and protective properties of roofing systems.

3. Waterproofing

  • Building Foundations: Penetration bitumen 35/50 is used in the waterproofing of building foundations, preventing water ingress and protecting the structural integrity of the buildings.
  • Bridges and Tunnels: It is used in the waterproofing of bridges and tunnels, offering protection against water penetration and corrosion.
  • Damp-Proof Courses: Bitumen 35/50 is used in damp-proof courses to prevent rising damp in masonry structures.

4. Industrial Applications

  • Bituminous Paints: It is used in the production of bituminous paints, providing protective coatings for metal, concrete, and wood surfaces.
  • Coatings and Sealants: Bitumen 35/50 is used in industrial coatings and sealants, offering excellent adhesion, flexibility, and resistance to weathering.
  • Adhesives: It is used as a base material in the production of bituminous adhesives for various industrial applications.

Advantages of Penetration Bitumen 35/50

  1. Durability: Penetration bitumen 35/50 offers excellent durability, making it suitable for high-stress applications such as road construction and roofing.
  2. Adhesion and Cohesion: It provides strong adhesion and cohesion properties, ensuring the integrity and longevity of the structures it is used in.
  3. Weather Resistance: Bitumen 35/50 is highly resistant to weathering, including UV radiation, temperature fluctuations, and moisture.
  4. Waterproofing: It offers superior waterproofing properties, making it ideal for roofing and waterproofing applications.
  5. Flexibility: Despite its hardness, penetration bitumen 35/50 retains sufficient flexibility to accommodate structural movements and thermal expansion.

Disadvantages of Penetration Bitumen 35/50

  1. Temperature Sensitivity: Bitumen 35/50 can become brittle at low temperatures and soft at high temperatures, potentially affecting its performance in extreme climates.
  2. Environmental Concerns: The production and use of bitumen can have environmental impacts, including emissions and the use of non-renewable resources.
  3. Handling and Storage: Bitumen requires careful handling and storage at elevated temperatures to maintain its workability.
  4. Initial Cost: The initial cost of bitumen-based materials can be higher compared to some alternatives, though their durability can offset these costs over time.

Price Factors of Penetration Bitumen 35/50

The price of penetration bitumen 35/50 is influenced by several factors, including:

  1. Crude Oil Prices: As bitumen is derived from crude oil, fluctuations in crude oil prices directly impact the cost of bitumen.
  2. Supply and Demand: Market dynamics, such as supply and demand, can significantly affect bitumen prices. High demand or limited supply can drive prices up.
  3. Quality and Specifications: The quality and specifications of bitumen, including the penetration grade and purity, influence its price. Higher quality bitumen with specific properties may command a premium price.
  4. Transportation Costs: The cost of transporting bitumen from production facilities to end-users can affect its final price, especially for regions far from production centers.
  5. Processing and Refining Costs: The costs associated with the refining and processing of crude oil to produce bitumen impact its price. More refined products with additional processing steps may be more expensive.
  6. Geographical Location: Regional market conditions, including local demand, availability, and regulatory factors, can influence the price of bitumen.

Quality Tests for Penetration Bitumen 35/50

To ensure the quality and performance of penetration bitumen 35/50, several standard tests are conducted:

  1. Penetration Test: Measures the depth to which a standard needle penetrates the bitumen sample under specified conditions, determining its hardness.
  2. Softening Point Test: Determines the temperature at which bitumen softens, indicating its thermal stability.
  3. Ductility Test: Measures the ability of bitumen to stretch without breaking, indicating its flexibility.
  4. Viscosity Test: Evaluates the flow properties of bitumen at different temperatures, ensuring it meets the required specifications.
  5. Flash Point Test: Determines the temperature at which bitumen emits vapors that can ignite, indicating its safety during handling and application.
  6. Solubility Test: Measures the solubility of bitumen in solvents like trichloroethylene, indicating its purity and quality.

Environmental Considerations

The production and use of penetration bitumen 35/50 have environmental implications. Efforts are being made to minimize the environmental impact through the following measures:

  1. Emission Control: Modern production facilities implement emission control technologies to reduce air pollution.
  2. Sustainable Sourcing: Ensuring that crude oil is sourced from environmentally responsible suppliers.
  3. Recycling: Using recycled materials in bitumen production and promoting the recycling of bituminous products.
  4. Energy Efficiency: Implementing energy-efficient processes in the production and application of bitumen to reduce overall energy consumption and emissions.

Future Prospects

The future of penetration bitumen 35/50 looks promising with advancements in technology and increased focus on sustainability. Innovations in production processes, improved formulations, and enhanced recycling methods are expected to enhance the performance and environmental friendliness of bitumen. As infrastructure development continues globally, the demand for high-quality bitumen products is likely to grow.


Penetration bitumen 35/50 is a versatile and essential material in various industries, including road construction, roofing, and waterproofing. Its production involves careful selection of crude oil, precise distillation, and controlled air blowing processes to achieve the desired properties. The numerous advantages of penetration bitumen 35/50, including durability, adhesion, and weather resistance, make it a preferred choice for many applications. However, it is important to consider its disadvantages and environmental impact. The price of bitumen is influenced by several factors, including crude oil prices, supply and demand, and transportation costs. Peak Universal Business, a trusted supplier, ensures the provision of high-quality bitumen products, meeting diverse needs and specifications.

You can Read More about this product Here: Penetration Bitumen and Penetration bitumen 35/50

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