13 - Road-construction bitumens characteristics -3 - viscosity & breaking point Fraass

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En provenance du cours de École des Ponts ParisTech

Mastering bitumen for better roads and innovative applications

90 notes

École des Ponts ParisTech

Mastering bitumen for better roads and innovative applications

90 notes

During the four coming weeks, best experts in bitumen will bring you their knowledge and experience to build a strong understanding of today’s realities and new perspectives on the future of bitumen. Total is the European leader on bitumen markets. Innovation has always been the key to sustainability and durability in the products they develop. Their main objective here is to share technical knowledge and experience to insure bitumen are being used in the most effective and efficient ways for their different applications in road works. Ecole des Ponts, France oldest engineering school, remains very much in the present, as it has always been, in training engineers in order to meet the needs of our society and citizens in key areas such as transport housing and urban services, but also in fields like energy, environment, climate sciences, land-use planning and sustainable development. Nineteen world recognized experts on bitumen are contributing to this MOOC. The idea is to provide the broadest prism on this topic area with speakers coming from research, industry and end users.

À partir de la leçon

Constitution, structure and characterization of bitumen - specifications-rheology

Schematic constitution and structure of bitumen, relationship between structure and rheology | Performance tests | Bitumen 3 states | Penetration test EN 1426 & Softening Point EN 142 | viscosity measurement EN 12596, EN 12595, Explanation of breaking point Fraass measurement EN 12593 | testing Binder after RTFOT, after RTFOT and PAV | Euopean specifications and process of revision | Viscosity based standards (ASTM D3381 | Deformation and flow. Elasticity, plasticity, visoc-elasticity. Newtonian, Non-Newtonian behaviour. Stress-strain response, shear modulus and phase angle. | Bending Beam Rheometer (BBR) and Dynamic Shear Rheometer (DSR) | Superpave specifications.

10 - Composition of bitumen8:07

11 - Road-construction bitumens characteristics -1 - generalities6:12

12 - Road-construction bitumens characteristics -2 - Penetrability & Softening Point7:06

13 - Road-construction bitumens characteristics -3 - viscosity & breaking point Fraass6:57

14 - road-construction bitumens characteristics -4 - ageing12:25

15 - Bituminous product standards /Understanding European specifications and process for revision10:01

16 - Viscosity based standards (ASTM D3381)5:17

17 - Rheology of bitumens6:17

18 - Road-construction bitumens characteristics -5- Bending Beam Rheometer and Dynamic shear Rheometer and MSCRT7:43

19 - Superpave bitumen Specifications4:30

20 - Global view of bitumen products standards and development3:07

Rencontrer les enseignants

Eric GOSSE
Vice Président
TOTAL MARKETING SERVICES
Armel de la BOURDONNAYE
Directeur
ECOLE DES PONTS PARISTECH
Sophie LIMBORG
Mission Head
TOTAL MARKETING SERVICES
Mike SOUTHERN
Director
Bituconsult LTD
Clémence QUEFFELEC
Assistant professor
CEISAM laboratory, University of Nantes, France
Gilles GAUTHIER
Technical and Product development manager
TOTAL BITUMEN
Olivier GAMET
Production Pilot
Supply department / TOTAL
John D'ANGELO
Chief Operating Officer
D’Angelo Consulting, LLC.
Gary SCHOFIELD
Technical Manager
Total Bitumen (UK)
Nicolas HAUTIERE
Project Director
IFSTTAR / COSYS Department
Frédéric ANDRZEJEWSKI
Expert bitumen industrial roofing activity
Jean Pascla PLANCHE
Vice President
Asphalt and Petroleum Technologies / Western Research Institute
Virginie MOUILLET
PhD, Senior Researcher, deputy head of chemical Unit
Regional Laboratory of Aix-en-Provence / Cerema Méditerranée
Hélène AZOULAY
Deputy Managing Director
PFC/Ecole des Ponts
Nadège VO VINH
Bitumen Shipping Manager
Supply International Bitumen / TOTAL MARKETING SERVICES
Cécile GIACOBI
Pavement expert
Vinci Autoroutes
Laurence LAPALU
Bitumen Group Manager
TOTAL MARKETING SERVICES - Research Division
Yves BROSSEAUD
senior researcher - road materials expert - materials and Structures Department
IFSTTAR - Nantes - France
Emmanuel CHAILLEUX
Research Director
IFSTTAR
Jean-François CORTE
Member of the Council of Environment and Sustainable Development
French Ministry of Environment, Energy and Sea

[MUSIC]

Dear participants, hello.

It's a pleasure to meet you again for this new technical session.

In this video, I will be assisted by a new expert.

>> Hello, I'm happy to join this MOOC on Bitumen.

I'm Sophie Limborg, the Chairperson of the CEN/TC 336

European Technical Community dealing with the open standards on Bitumen.

In the previous session, the penetration test and

the tests were introduced to you by Lawrence.

In this new session we will explore two other test methods.

The viscosity test and the Fraass brittlle point test.

Indeed, Bitumen's stiffness versus temperature is determined thanks to

different standardized test methods.

These test methods are able to characterize Bitumen at different

temperature.

That is for the typical rendering of service temperatures in roads.

For instance, stiffness at intermediate service temperature,

is characterized by penetration.

Elevated surface temperature is characterized by [INAUDIBLE] and

[INAUDIBLE] determination.

Fraass brittle point enables to characterize

the susceptibility under low service temperature.

>> The Bitumen is bind with viscosity can be measured by different tests.

In this video I will focus on the determination of dynamic viscosity

by vacuum capillary and on the kinematic viscosity.

The dynamic viscosity by vacuum capillary is a standardized test.

In Europe the standard reference is EN 12596.

This standard specify a method for the determination of

the dynamic viscosity of bitumenous binders by means of

a vacuum capillary viscosimeter generally at 60 degrees Celsius and

in a range of between 0.0036 Pascal seconds and

580,000 Pascal seconds.

The test consists in data mining the time for a fixed volume of the liquid

to be drawn up through a capillary tube by means of a vacuum and temperature.

The viscosity is calculated by multiplying the flow time in seconds

by the viscosimeter calibration factor.

The dynamic viscosity at 60 degrees Celsius characterize the consistency

of the bitumen at high temperature of service when rooting appears.

The kinematic viscosity is another standardized test to measure

the bitumen's viscosity.

In Europe the standard reference is EN 12595.

This European standard specifies a method for

the determination of the kinematic viscosity,

a bituminous binder at 60 degrees Celsius and

135 degrees in a range from 6 millimeters square per

second to 300,000 millimeters square per second.

The test consists in measuring the time for fixed volume of the liquid to be

flowed through the capillary of the calibrated glass capillary viscosimeter

and accurately reproducible work static load and

at a closely controlled temperature.

The kinematic viscosity is calculated by multiplying the flux time

in seconds by the viscosimeter calibration factor.

The kinematic viscosity at 135 degrees Celsius

gives information about the probability of the bitumen at high temperature.

This is a key parameter when mixing bitumen with aggregates in

the asphalt plant.

>> The determination of the Fraass breaking point is a standardized test.

In Europe the standard reference is EN 12593.

The European standard specifies the methods for

determining the brittleness of bituminous binders at low temperatures.

A test consists in applying a sample of

bitumen's binder on a metal plate at an even thickness.

The plate is stipulated to constant cooling rate and

flex repeatability and the other binder layers break.

The temperature, at which the first crack appears,

is reported as the Fraass breaking point, the clear and

frank crack should be obtained when performing the test.

Attention should be paid to the sample preparation,

to the cleanliness of the coating test plates.

And when gripping the prepared plate between the clips.

Those parameters are key factors for

performing the test under accurate and repeatable conditions.

For the pure bitumens the softer the bitumen the higher the penetration,

the lower the Fraass breaking point.

In conclusion, viscosity determined under different temperatures and

Fraass brittle point are parameters which enable to specify bitumen under different

temperature condition respectively, high and low service temperatures.

The dynamic viscosity at 60 degrees centigrade, characterize the consistency

of the bitumen at high temperature of service when rutting appears.

The kinematic viscosity at 135 degrees gives

information about the pumpability of the bitumen at high temperature.

These are among the property which enable to characterize Bitumen and

the different conditions of use.

These tests are determined with fresh binder that is not aged binder.

In the forthcoming video, you will be presented the aging conditions of Bitumen.

Both on short term and long term aging and its characterization.

Thank you for your attention.

[MUSIC]

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