Modified Bitumen

Premium Road Binders

POLYMER MODIFIED BITUMEN TECHNOLOGY

Hindustan Colas Technical Centre

The most preferred road

Safe, comfortable, convenient & pleasant to ride


2

Performances with low capital and maintenance cost



3



4

Major road defects


5

Major road defects


6

� Climatic conditions

- Improved balance between low T and high T properties

� Increasingly aggressive traffic conditions

- Heavy vehicles- Slower traffic- Increasing axle loads & tyre pressures- Fuel spillage- Harder grades might increase the risk of low temperature cracking

The Need For Premium Binders


7

- Harder grades might increase the risk of low temperature cracking- Need for improved fatigue resistance and flexibility- Need to improve cohesion and adhesion properties

� Economic issues

- More durable pavement, longer lasting investments

- Development of thinner pavements


The performances of the Binders v/s the performances of the Pavement


8

Bitumen Properties Asphalt Mix Performances Pavement Characteristics


The performances of the Binders v/s the performances of the Pavement


9

Good Roads Appropriate Asphalt Mixes Suitable Asphalt Binders

The need to tailor the solution to the needs of the owners and those of the end users


10

Pavement Performance

�Rheology�Cohesion, Adhesion�Elasticity�Temperature susceptibility�Moisture Sensitivity

Decrease the viscosity of the


11

Decrease the viscosity of thebitumen at low service temp

- Brings flexibility to theasphalt mix

Increase the viscosity of the bitumenat high service temp

- Improve Rutting Resistance

Modifier Modifier Types

� Be compatible with Bitumen� Blend with Bitumen properly & thoroughly� Maintain properties during storage, application and in service� Be cost effective considering life cycle cost� Be capable of being processed by


12

� Be capable of being processed by conventional mixing plants and laying machinery

Elastomers +++ +++ +++ ++ +++

Permanent Deformation

Thermal Cracking

Fatigue Cracking

Moisture Damage

Ageing

Performance Comparison


13

Elastomers +++ +++ +++ ++ +++

Plastomers ++

Crumb Rubber

++ ++ +

Hydrated Lime

++ ++

HINCOL CRMB 60

HINCOL PMB 40

HINCOL RW 4560

Softening Point > 60 > 60 > 85

Elastic Recovery > 70 > 75 > 85

Performance Comparison


14

Elastic Recovery > 70 > 75 > 85

Penetration < 50 30 - 50 40 – 60

Elastic Modulus @40C, MPa

2000 3000 5000

Styrene – Butadiene - Styrene copolymers (SBS)

hard polystyrene domains

soft, flexible polybutadienechains


15

� Butadiene (of SBS) absorbs the maltene phase: swells up

till nine times its initial volume

� R&B = f ( % SBS) : S-type curve

⇒⇒⇒⇒ elastic and high strength tridimentional network in bitumen molecules improve the binder properties

30

40

50

60

70

80

90

0 3 5 7

% SBS

R&B (°C)

PmBs Characterisation versus specifications

• standard tests

� penetration (25 °C and 40 °C), R&B

• physical & chemical analysis

� IR, NMR, SEC, DSC, Microscopy


16

� IR, NMR, SEC, DSC, Microscopy

• simulation of ageing / storage stability

� RTFOT, PAV, storage stability

• rheological tests

� viscosity, DSR, BBR, elastic recovery, tensile test (DTT, force-ductility)

Ductility @ 25 deg cOr Elastic Recovery

Storage stability of PmBs

�Compatibility between bitumen/polymer

(polymer type and content, bitumen nature)

�Storage conditions: duration, temperature, mixing

systems

�UV-Fluorescence microscopy and Delta R&B

top/bottom

a b

c d


17

a compatibleb, c semi-compatible

d incompatible

d

Mix testing

• High temperature performance: Wheel Tracking Test

LCPC WTT : According to the French standard, rutting depth measured must be

less that 10 % after 30,000 cycles at 60 °C.


18

Asphalt Slab

30 000 cycles

Rutt depth

Asphalt Slab

Rutting performance: Wheel Tracking Test

Dense Asphaltic Concrete - 40oC

60 / 70 Bitumen


19

Moderately Modified PMB

Heavily Modified PMB

100 pen + 3%SBS

100 pen


Dense Asphaltic Concrete - 40oC


20

0 10 20

100 pen + 7%SBS

100 pen + 5%SBS

rutting rate (mm/105 wheel passes)

BC – VG 30



21

BC – CRMB 60

BC – PMB 40

Good elasticity Good elasticity which reduces the tendency for pavements to crack, -durability.

Higher softening point Higher softening point to resist permanent deformation without adversely affecting the properties of bitumen, durability.

Improved adhesion Improved adhesion and cohesioncohesion properties for more durable asphalt, durability.


22

Lower temperature susceptibility Lower temperature susceptibility for better performance in both high and low temperature environments, durability.

Easy handling Easy handling without major plant change and ease of stock management, adaptability.

Storage stable Storage stable due to compatible blend of bitumen and polymer that reduces likelihood of material drifting off-spec during storage, reliability.

°c

60

70

HINCOL PMB 40Softening Point

Spec


50 Comp 1

Comp 2

Comp 3

50

60

70

80

90

HINCOL PMB 40

Comp 1Comp 3

Elastic Recovery Spec


24

50 Comp 1

Comp 2

Comp 3

Why HINCOL as a preferred partner� Joint venture company of a leading PSU, HPCL

� Technical knowhow from world’s no 1 construction company , Colas

� Strong Research & Development

� Strong network within Colas Community and with External agencies

� Quality Commitment (Far exceeding min spec limits)

� Wide network of manufacturing facility across India

� Delivery Promise


� Delivery Promise

� Delivered to Customer Model (supply chain management)

� Technical Services

� In-house Mix Design

� Application Support

� Training : Supervisor/Foreman training on Product

Handling/Application/storage

“We can’t spell Success without

U”


26

Documents

Modified Bitumen