VISCOSITY GRADE BITUMEN
AC Standard – 20
Asphalt Cement AC 20 is a versatile, medium-viscosity bitumen grade designed for road construction and maintenance in moderate to hot climates. It provides excellent durability, flexibility, and resistance to wear and tear, making it a reliable choice for constructing roads that experience regular traffic. AC 20 bitumen is known for its strong binding capabilities, ensuring that pavements remain resilient under various environmental stresses and traffic loads, offering a long-lasting solution for infrastructure projects.
USES:
AC 20 bitumen is widely used in a variety of road construction and maintenance applications, particularly in regions with moderate to warm climates. Its balanced viscosity and performance features make it suitable for:
Hot Mix Asphalt for Moderate Climates: AC 20 is extensively used in hot mix asphalt for creating smooth and durable road surfaces in regions with moderate to high temperatures. Its strong binding properties ensure optimal coating of aggregates, resulting in high-quality pavement.
Urban and Rural Roads: AC 20 is an excellent choice for constructing roads in urban and rural settings where traffic volumes vary, offering a balance of durability and flexibility for typical road conditions.
Bituminous Macadam and Semi-Dense Mixes: AC 20 provides a stable and durable foundation for bituminous macadam and semi-dense bituminous mixes, ensuring longevity and resilience.
General Road Repairs: AC 20 is commonly used in maintenance and repair applications due to its versatile performance, helping to restore road surfaces and extend their service life.
KEY FEATURES
AC 20 bitumen is characterized by several key features that make it ideal for road construction and maintenance in moderate to hot climates:
Medium Viscosity for Stability: AC 20 has a balanced viscosity, providing sufficient resistance to deformation while ensuring workability during construction. This makes it suitable for a range of road types and traffic conditions.
Strong Binding and Adhesion: AC 20 provides excellent adhesion to aggregates, creating a durable and cohesive pavement that can withstand traffic loads and environmental conditions.
Water-Resistant Properties: AC 20’s water-resistant nature helps protect underlying layers from water damage, preventing premature pavement failure and extending the lifespan of the structure.
Durability and Flexibility: AC 20 is designed to offer a balance between durability and flexibility, allowing pavements to withstand regular traffic loads and temperature variations without cracking or deforming.
TECHNICAL SPECIFICATIONS
AC 20 bitumen meets the high standards outlined by ASTM D 3381, ensuring consistent quality and performance. Key technical parameters include:
Penetration Value: AC 20 has a penetration value of 50-80, providing a balance between flexibility and stiffness, suitable for moderate to warm climates.
Viscosity: AC 20 bitumen has a viscosity of 1600-2400 poise at 60°C, making it suitable for a wide range of temperatures and ensuring ease of application during construction.
Softening Point: The softening point of AC 20 is typically around 48-56°C, providing stability in moderate to hot climates without becoming too soft or deformed.
Ductility: AC 20 offers high ductility, ensuring that it can stretch and deform under stress without breaking, which is essential for pavements subject to varying traffic loads and temperature fluctuations.
STORAGE:
Maintain storage temperatures between 150°C and 180°C to prevent hardening and ensure the bitumen remains workable.
Use steel containers or bitumen tanks that are designed to handle high temperatures and prevent contamination.
Ensure storage facilities are well-ventilated, dry, and protected from moisture to prevent oxidation and degradation.
Avoid prolonged storage at high temperatures and frequent temperature fluctuations, which can lead to the hardening and loss of essential properties.
PACKAGING:
Bitubox
Ideal for convenient bitumen transportation, cost-effective, and environmentally friendly packaging solution.
SPECIFICATIONS:
|
DESCRIPTION
|
UNIT
|
MIN
|
MAX
|
TEST METHOD
|
|---|---|---|---|---|
|
Dynamic Viscosity @ 60°C
|
P
|
1600
|
2400
|
ASTM D2171
|
|
Kinematic Viscosity @ 135°C Min
|
CST
|
300
|
-
|
ASTM D2171
|
|
Flash Point °C
|
°C
|
232
|
-
|
ASTM D92
|
|
Solubility in Trichloroethylene %
|
%
|
99
|
-
|
ASTM D2042
|
|
Penetration in 25°C
|
0.1MM
|
60
|
-
|
ASTM D5
|
|
Spot Test
|
@
|
Negative
|
-
|
AASHTO 102
|
|
Tests on Residue from Rolling Thin Film Oven Test
|
||||
|
Viscosity 140°F (60°C) Max
|
P
|
-
|
10000
|
ASTM D2171
|
|
Ductility 77°F (25°C) 5cm/min, Min
|
CM
|
50
|
-
|
ASTM D113
|
