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Bitumen (Viscosity Grade)

What is Bitumen?

India has traditionally used penetration grade bitumen as a binder for road construction. To increase the lifespan of highways, reduce maintenance costs, and handle the load of today's traffic, MoRTH, in consultation with BIS, has revised from penetration grade to viscosity grade bitumen.

Features of Bitumen

BASED ON FUNDAMENTAL ENGINEERING PROPERTY

Predictable performance

PERFORMS WELL UNDER LARGER TEMPERATURE RANGE

Less rutting
at high temperatures,
less cracking at low temperatures

HIGHER STRESS

Can handle higher traffic,
can handle higher
axle loading without rutting

ETTER MIX DESIGN

Better method of choosing
binder grade

SIMPLER & RELEVANT TESTS

Lower number of tests,
cheaper testing cost

Industrial Uses of Bitumen

VG 10 Surface dressing, Paving in very cold climate VG 20 grade is used for paving in cold climates and high-altitude regions VG 30 Warmer temperature, heavy traffic loads & heavy duty pavements VG 40 Higher temperature and heavy traffic roads, Highly stressed areas (intersections, near toll booths and truck parking lots) Due to its water-resistant properties, it is also used for roofing

Why Purchase Bitumen From Nayara Energy?

Production

Nayara Energy produces bitumen from its
refinery at Vadinar and markets it in bulk.
It is obtained as a residual product in petroleum refinery.

Customer service

Dedicated sales team for customer delight
Support in troubleshooting

Quality

Stringent quality control at all stages
State of the art quality control lab

Bitumen Specifications

Viscosity grading classifies bitumen on the basis of a fundamental engineering parameter.

VISCOSITY GRADE SPECIFICATION OF BITUMEN AS PER IS 73:2013 (FOURTH REVISION)

PARAMETER UNIT LIMIT VG-10 VG-20 VG-30 VG-40
Suitability based on 7 day avg max air temperature range range < 30 30-38 38-45 > 45
Absolute Viscosity at 60°C min min 800-1200 1600-2400 2400-3600 3200-4800
Kinematic Viscosity at 135°C min min 250 300 350 400
Flash point min min 220 220 220 220
Solubility in Trichloroethylene min min 99 99 99 99
Penetration at 25°C, 100g, 5s min min 80 60 45 35
Softening point (R&B) min min 40 45 47 50
TESTS ON RESIDUE FROM THIN FILM OVEN TEST/RTFOT
Viscosity Ration at 60°C		 -- max 4 4 4 4
Ductility at 25°C cm min 75 50 40 25

Viscosity vs. Penetration Grading in Bitumen

Parameter Viscosity Grade Penetration Grade
Grading basise Fundamental engineering parameter Empirical parameter
Test temperature Measures at both 60°C & 135°C Measures only at 25°C
Predictability of performance Any two VG grade bitumen will
exhibit similar performance		 Not predictable
Handling Easier for mixing and compacting
as resulting mix is predictable		 Not predictable
Mixing Viscosity at mixing
temperature available 		Not available
Operational performance Wide range of temperature Narrow range
Tests 7nos. - All tests have relationship
with field performance		 14nos. - Many do not
correlate with field performance
Testing Faster and cheaper Time consuming and expensive
FAQs

What is bitumen?

What are the primary applications of bitumen?

Why is bitumen important for road construction?

What grades of bitumen are available from Nayara Energy?

What are the benefits of using high-quality bitumen?

How is bitumen transported?

Does bitumen require heating before application?

Which industries use bitumen apart from road construction?

How does Nayara Energy ensure bitumen quality?

How can contractors purchase bitumen from Nayara Energy?

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