19 - Superpave bitumen Specifications

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En provenance du cours de École des Ponts ParisTech

Mastering bitumen for better roads and innovative applications

88 notes

École des Ponts ParisTech

Mastering bitumen for better roads and innovative applications

88 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

Hello, I’m John D’Angelo of D’Angelo Consulting.

Formally I worked for the US Department of Transportation

Federal Highway Administration in the office of Pavement Technology.

With this video we will discuss the Superpave asphalt binder specification

and how it relates to pavement performance

based on traffic, climate and aging.

We will explore how the asphalt binder is selected

based on the climate where the pavement will be placed,

the traffic it is expected to carry

and the types of pavement distress it may experience…

An asphalt pavement is expected to perform

under extreme climate conditions

from the heat of summer to the frozen winter.

It also has to carry varied traffic

from small sports cars to heavily loaded trucks.

Proper selection of the asphalt binder to address these varying conditions

is critical to good performance

and the Superpave Asphalt Binder Specification

was specifically developed to do just that.

Asphalt binders are designated for PG (Performance Grade)

and then the temperature ranges

for which will be used, as an example PG 64-22.

The 64 is the expected high pavement temperature

and the -22 is the expected low pavement temperature

that the binder will experience

based on the climate where the pavement will be built.

Asphalt binder properties change with temperature.

At high temperatures, it is a viscous fluid

and at low temperatures, it acts as an elastic solid.

As mentioned by Jean-Pascal Planche in a recent video,

bitumen is a viscoelastic material

exhibiting different behaviours at different temperatures.

This variation in properties is taken into consideration

in the Superpave Specification.

As the asphalt binder ages in the pavement,

its properties also change

and this affects its performance.

As the asphalt binder ages, it becomes stiffer and more brittle

making it more prone to cracking.

The Superpave specification addresses this

by testing at various aging conditions and temperatures

to evaluate how the binder will perform as it ages.

Rutting of the pavement typically happens early in its life

and at high temperature.

Cracking from traffic loading or fatigue cracking happens later in life

and at moderate temperature.

Low temperature cracking also occurs later in the pavement's life

caused by exposure to very low temperature.

Under the Superpave specification,

three aging conditions are tested.

The unaged binder,

early life simulated in the Rolling Thin Film Oven (RTFO),

and long life simulated in the Pressure Aging Vessel (PAV).

This allows for an evaluation of how the binder will perform

throughout its life in the pavement.

To evaluate the early life conditions,

testing is done at very high temperatures

on unaged binder to determine if it will be workable during construction.

The binder is then tested at high pavement service temperature

on RTFOT short-term aged binder to determine the potential for rutting.

To evaluate the binder's later life conditions,

testing is done on PAV long-term aged binder

at moderate temperature to determine cracking associated with traffic loading

and at very low temperatures to evaluate low temperature cracking.

Traffic is taken into consideration by adjusting the binder grade.

If slow speed or heavier traffic is expected,

the binder grade is adjusted so a stiffer binder is used.

All these items are combined to create a complete specification set.

To summarize: the binder is selected based on the climate

where the pavement will be placed

both high temperature and low temperature being taken into account.

Testing is done to address specific types of pavement distress

such as rutting, load-related cracking and low temperature cracking.

Traffic is considered by adjusting the grade selection to stiffer materials

for slow moving or heavier traffic.

Thanks for your attention and enjoy the rest of the MOOC…

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