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Bitumen Penetration Grade – EU Standard – Bitumen 35/50

Penetration Grade Bitumen

EN Standard – Bitumen 35/50

Bitumen 35/50 is a high-quality, hard-grade bitumen characterized by a penetration range of 35 to 50 tenths of a millimeter. This grade of bitumen is known for its significant resistance to deformation and its ability to withstand extreme temperatures, making it an ideal choice for areas with high thermal variations and heavy traffic loads. The higher viscosity of Bitumen 35/50 ensures that it maintains its structural integrity under the stress of heavy usage, providing long-lasting performance and durability. This grade of bitumen is derived from the distillation of crude oil and is composed primarily of complex hydrocarbons. Its unique properties, such as high softening points and low penetration values, are achieved through a meticulous refining process that removes impurities and enhances its physical characteristics. As a result, Bitumen 35/50 is exceptionally resilient and offers superior resistance to water, chemicals, and oxidative aging.

Uses:

Bitumen 35/50 is extensively used in the construction of infrastructure where high performance and durability are critical. Key applications include:
  • Highways and main roads: Due to its ability to withstand heavy loads and high temperatures, Bitumen 35/50 is perfect for highways and main roads that experience significant traffic volume.
  • Airport runways: The grade’s high resistance to deformation under heavy loads makes it ideal for use in airport runways, where the impact and weight of aircraft require robust and resilient surfacing materials.
  • Heavy-duty pavements: For industrial and commercial areas where heavy vehicles and machinery operate, Bitumen 35/50 provides the necessary strength and durability to ensure long-lasting pavement performance.
  • Bitumen 35/50 is particularly suited for regions with high ambient temperatures and heavy traffic, where its rigidity and resistance to rutting ensure prolonged service life.

Quality Standard:

Bitumen 35/50 adheres to the stringent requirements set forth by the European Standard EN 12591. This standard guarantees that the bitumen meets specific criteria, including:
  • Penetration: Ensures the bitumen’s hardness and suitability for various applications.
  • Softening point: Indicates the temperature at which the bitumen begins to soften, ensuring it performs well under high-temperature conditions.
  • Flash point: A measure of the bitumen’s safety in terms of its volatility and risk of ignition.
  • Solubility: Ensures the bitumen is free from impurities that could affect its performance.
  • Adhering to these standards ensures that Bitumen 35/50 provides reliable and consistent performance across various construction projects.

Storage:

Proper storage of Bitumen 35/50 is crucial to maintaining its quality and effectiveness. Key considerations for storage include:
  • Temperature control: Maintain storage temperatures between 150°C and 180°C to prevent hardening and ensure the bitumen remains workable.
  • Containers: Store in steel containers or bitumen tanks designed to handle high temperatures and prevent contamination.
  • Environment: Ensure storage facilities are well-ventilated, dry, and protected from moisture to prevent oxidation and degradation.
  • Handling: Avoid prolonged storage at high temperatures and frequent temperature fluctuations, which can lead to the hardening and loss of essential properties.

Packing:

Bitumen 35/50 is available in various packaging options to meet the diverse needs of construction projects:
  • Bulk tankers: For large-scale projects, bulk tankers provide a cost-effective and efficient means of transporting and storing bitumen.
  • Steel drums: Ideal for smaller projects or where precise quantities are required, steel drums offer a convenient packaging solution.
  • Jumbo bag: Suitable for easy handling and reduced contamination risk, polybag packaging provides a flexible option for bitumen storage and transportation.

Specification:

Description
Unit
Min
Max
Test method
Penetration at 25°C
1/10mm
35
50
EN 1426
Softening point, Ring & Ball
°C
50
58
EN 1427
Penetration Index
-
-1.5
0.7
EN 12591 Annexure A
Fraass Breaking Point
°C
-
-5
EN 12593
Specific Gravity 25/25°C
Kg/cm3
1.00
1.10
EN ISO 3838
Flash Point COC
°C
°240
-
EN ISO 2592
Dynamic Viscosity at 60°C
Pas
255
-
EN 12596 EN13702
Dynamic Viscosity at 135°C
Mm2/s
370
-
EN 13702
Solubility in Organic Solvents (m/m)
&
99.0
-
EN 12592
Resistance to hardening RTFOT:
-
-
-
EN 12607-1
Increase in softening point
°C
-
8
EN 1427
Retained penetration at 25°C
%
53
-
EN 1426
Change in mass (absolute value)
%
-
0.5
EN 12607 -4

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