Bitumen C320 – Cutback Bitumen for Prime Coat & Surface Dressing

Bitumen C320 is a cutback bitumen with medium viscosity, widely used for prime coats, surface dressing, and asphalt patching. This cutback bitumen offers excellent surface penetration and adhesion, making Bitumen C320 a reliable binder for road construction and maintenance in diverse climates.

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What Is Bitumen C320?

Bitumen C320 is a viscosity-graded bitumen manufactured to Australian Standard AS 2008 specifications, with a viscosity of approximately 320 Pa·s at 60°C. As the hardest commonly used grade, Bitumen C320 offers superior stiffness and deformation resistance, making it the preferred choice for heavy-duty asphalt applications across Australia.

Bitumen C320 is widely used in dense-graded asphalt production for highways, urban roads, and high-traffic pavements requiring maximum rutting resistance. Its firm consistency supports heavy axle loads and elevated in-service temperatures. Bitumen C320 also suits stabilization work and structural asphalt layers demanding strength and durability.

Blackrock Bitumen supplies high-quality Bitumen C320 manufactured to meet Australian Standard AS 2008 viscosity and quality requirements. Our Bitumen C320 undergoes strict quality testing to ensure consistent performance for contractors and infrastructure projects across Australia. Choose Blackrock Bitumen for reliable, compliant, and specification-grade Bitumen C320 supply.

Applications of Bitumen C320

Dense-graded asphalt

wearing and binder courses on high-traffic Queensland, NT, and WA highways and motorways where heat and heavy truck traffic demand elevated rutting resistance

Sprayed sealing

Sprayed sealing on primary roads in warm-temperate and subtropical climates, where C240 would be susceptible to bleeding in summer but C170 would be too soft for year-round durability

Airport runways

Airport runway and taxiway construction at airports in warm climate zones (Cairns, Darwin, Townsville, Broome, Karratha), where solar heat loading is extreme and pavement distress risk is elevated

Heavy-duty urban arterials

Heavy-duty urban arterials, bus lanes, and intersections in subtropical cities (Brisbane, Darwin, Townsville) where slow-moving heavy vehicles and high surface temperatures combine to create maximum rutting stress

Advantages of Bitumen C320 Bitumen

Higher dynamic viscosity

Ccompared to C240 provides significantly better rutting resistance in warm and subtropical Australian climates, directly reducing maintenance cost and pavement distress

Higher softening point

Ensures the binder remains stable and viscous at Queensland and NT pavement surface temperatures, which routinely exceed 55°C in summer

Preferred Queensland TMR and NT DIPL

DGA wearing courses — ensuring straightforward approval and acceptance on state government road projects in warm climate states

Uniform Coating

Ensuring straightforward approval and acceptance on state government road projects in warm climate states

Excellent base binder for producing stiff PMB grades

For premium wearing course applications on motorways and highways without requiring a stiffer C450 or C600 base

Supplied by Black Rock Bitumen from Dubai with AS 2008:1997 certification

Rapid ocean freight to Australian ports (Brisbane, Darwin, Fremantle), and complete import documentation

Black Rock Bitumen-C320

Essential Details

Description

  • Type
  • Penetration Grade Bitumen
  • Feed Stock
  • Crude Oil
  • HS Code
  • 27132000
  • Spot Test
  • Negative
  • Inspection
  • Included
  • Delivery Term
  • FOB-CFR-CIF
  • Production and Loading Period
  • Maximum 3 Weeks
  • Payment Term
  • TT Method FOB Delivery: 30% advance and balance against customs documents CFR/CIF Delivery: 30% advance and balance against B/L daft
  • Marking
  • Marking can be customized based on customer request
  • Supply Capacity
  • 50,000 MT/Month
  • Packing
  • -New Steel Drum -Jumbo Bag

Bitumen-C320 Specification

C320 Specifications

Essential Details

Test Method

Unit

Min.

Max.

  • Specific Gravity at 25 °C
  • ASTM D70
  • –
  • 1.01
  • 1.06
  • Penetration at 25 °C, 100g, 5s
  • ASTM D5
  • 0.1mm
  • 40
  • -
  • Absolute Viscosity at 60°C
  • ASTM D2171
  • P
  • 260
  • 380
  • Kinematic Viscosity at 135°C
  • ASTM D2170
  • cSt
  • 0.40
  • 0.65
  • Drop in Penetration after Heating
  • ASTM D5
  • %
  • –
  • 20
  • Flash Point
  • ASTM D92
  • °C
  • 250
  • –
  • Solubility in Trichloroethylene
  • ASTM D4072
  • %
  • -
  • 1
  • Spot Test
  • ASHTO T102
  • Negative

Bitumen-C320 MSDS

pdf

C320 Safety Data Sheet

Download
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Our Packaging

We deliver bitumen in versatile, secure options: economical Jumbo Bags, robust steel Drums, or high-volume Bulk Containers (Bitutainers/Bituboxes).

Terms of Payment

Payment Terms for Smooth Transactions

TT Method

The buyer pays 30% advance, with the balance against B/L draft (CFR) or customs docs (FOB).

LC at Sight

100% irrevocable, non-transferable, confirmed LC at sight, subject to bank approval by Black Rock Bitumen.

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    Successful Shipments

    Shipping & Delivery

    Port of Loading

    Jebel Ali, UAE – strategically located logistics hub ensuring efficient global shipping and quick turnaround times.

    Delivery Terms

    FOB, CIF, CFR – flexible Incoterms tailored to meet client requirements and international trade standards.

    Inspection

    SGS / Bureau Veritas available – third-party inspection to ensure quality, compliance, and shipment transparency.

    Lead Time

    2–4 weeks depending on order volume – optimized production and logistics planning for timely delivery.
    Our faqs

    Frequently Asked Questions.

    Australian Standard Bitumen C320 is a high-viscosity paving grade offering superior durability and rut resistance for heavy traffic roads.

    C320 is a high-viscosity paving bitumen manufactured to AS 2008 standards, designed for heavy-duty road construction.

    Where is C320 bitumen commonly used?

    It is widely used in highways, expressways, airport runways, and areas subjected to high traffic loads.

    C320 offers excellent resistance to deformation, superior durability, and strong performance in hot climate conditions.

    Yes, it is specifically engineered to perform reliably under Australia’s high temperatures and demanding traffic environments.

    Yes, Black Rock Bitumen supplies C320 bitumen in bulk, drums, and customized export packaging to meet project requirements.