26 - Laboratory testing of asphalt mix

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En provenance du cours de École des Ponts ParisTech

Mastering bitumen for better roads and innovative applications

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École des Ponts ParisTech

Mastering bitumen for better roads and innovative applications

98 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

Modifications of bitumen and applications (roads, roofing,…)

Modifications using polymers. Performance of PmB. Elastic recovery test. | of types of modifications of bitumen: CRMB, warm mix asphalt, temperature reduction | Bitumen emulsions, their components, manufacture, storage, handling, properties, classification, uses | surface treatments | design of pavements and types of aggregates | fundamental tests, the simulative tests (fatigue test, rutting test, giratory compactor,…) | interest of full scale testing of asphalt mix: example of IFSTTAR carousel | Hot mix plants, transport, laying and compaction of asphalt mix | physical characteristics and industrial applications for sealing.

21 - Polymer modified bitumens8:00

22 - Other types of modifications of bitumen: CRMB, temperature reduction6:15

23 - Bitumen emulsions9:45

24 - Surface treatments7:44

25 - Understanding design of flexible pavements and types of aggregates7:59

26 - Laboratory testing of asphalt mix9:06

27 - Full scale testing of asphalt mix: IFSTTAR carousel6:44

28 - Hot mix plants, transport, laying and compaction of asphalt mix6:52

29 - Roofing applications of bitumen - other binders and uses (clear binders,...)5:23

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 participant, hello.

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

I'm from IFSTAR, I already presented the video on surface treatment.

In this video, I will present the most common test applied to asphalt mix and

perform at the laboratory.

This video presents the main formulation test for

hot mixed asphalt carried out in laboratory.

This test allow for a variation of varied behavior in contoured

standardized condition in relation with the ground stresses allowing for

either the optimization, the composition during formulation study, or

for verification and assessment often [INAUDIBLE] to deterioration.

The test presented are the European tests and in particular those used in France.

In the USA the method are comparable but the test are somewhat different,

particularly for behaviors linked to thermal static.

The French method of the formulation of asphalt mixes in a laboratory

has been in development for more than 30 years now to satisfy the of

the pavement sickness design method and to confirm the properties at work sites.

This test allowed for the characterization of behaviors, measurement of mechanical

performances and aberration of resistances of stresses on the pavement.

There are both simulation tests such as resistance to sweeping by water,

and resistance to rotting by flow of asphalt mixes and more fundamental test.

To measure intrinsic properties such as complex [INAUDIBLE] or

[INAUDIBLE] resistance of asphalt mixes.

Before studying the behavior of material in place,

it is necessary to make sure that it can be applied properly at the work site.

The gyratory compactor test combines vertical compression

Is a single action jack and rotation with an angle of inclination of

1 degree in France and 1.25 degree in the USA.

The axis of a cylinder of given dimension at the mixture manufactory temperature.

This effects simulate the needing

of shearing of grains of asphalt mixings during compacting.

There is a correspondence with percentage of void verify at work site.

Percentage work site void equal percentage of a theory sheer compactor void for

a number of gyration equal to the sickness of the expressed in millimeter.

For example, the person does a void of a makes

a 40 millimeter sickness with a other workside,

void content close to that in laboratory after 40 gyration.

The suitability for compacting is evaluated.

The formulation is adjusted to bring it into compliance with a product standard.

This is a central test of asphalt mix composition studies and

it is one for which the behavior are verified.

The sensitivity to stripping by water involves comparing the resistancies

to compression of a batch of pieces, five to six in general,

immersed and saturated in water at a given temperature,

generally 18 degrees, but also 14 degrees.

With pieces conserved in air foditamine duration generally seven days but

also four days.

The higher the ratio, the better the resistance of stripping.

A ratio of 80% is often considered to be a good result.

The test pieces are generate prepared in laboratory by double

effects static compaction of dimension adapted to the maximum size.

They can also be called there at the job site.

The resistance to writing by crate.

And there are a general load and

at the highest temperature is simulated by your well written test.

Which involved monitoring the deformation produced by the passing of a wheel

on a platter kept on a mold of [INAUDIBLE] dimension.

And as function of a sickness of the layer five or ten centimeter.

Temperature in the plate is maintained constant at 60 degree plus or

minus 2 degree.

The rut at measure for a number of paces of 3,000,

10,000, and 30,000 cycle according to the specification.

The deformation is expressed in rut.

Deformation measure compared with the thickness of the plate, and

generally lays down the threshold of 7.5 and

20 to find the European specification of asphalt product performance classes.

The viscoelastic behavior of asphalt mix is governed by the nature of asphalt.

The rigidity of the [INAUDIBLE] is a function of its temperature and

the speed of loading.

These two parameter must be controlled in order to measure

the complex [INAUDIBLE] of the asphalt mix.

It includes an elastic pot and a viscous pot.

This is a discrepancy called the Phase Angle between the mechanical stress and

deformation resistance of the asphalt mix.

As a reminder this notion was presented to you during the eulogy

called characteristic test of asphalt in the previous video.

The model test are done in a domain of small deformation.

50 micro informations to avoid fatigue image.

The and trapezoidal test pieces of standardized dimensions

are subjected to a 2 point bending test embed at the base and subjected to

a sinusoidal bending at the top with different frequency one to 30 else.

And temperature generated when minus ten and 40 degrees.

Other types of mechanical stresses can be applied such as three or

four point bending on bars, compression traction, or shearing on cylinders.

So modulus results can be expressed in various forms.

Pavement design modulus, for example, are 15 degrees and ten hertz.

Master curves, black curves, Cole-Cole plane.

The resistance to fatigue characterize the damage in the large deformation

causing by the mechanical disruption cracks in the materials.

The greater the stress, the lesser the resistance of a time.

The simulates the bending with each pass of axle.

The principle of the test is the same as for the modulus test.

Two point bending on trapezoidal test piece, but for

one single temperature, ten degrees, and one single frequency,

25 hertz, according to three high label of information,

at about 80 to 140 and with six repetitions per level.

The fatigue line is determined by double the linear regression and

the epsilon 6 fatigue dimension criterion is calculated.

It is a deformation leading to breakage at one million cycles.

The [INAUDIBLE] the [INAUDIBLE] behavior which increases a walking

life of the courses for the [INAUDIBLE] level of stresses or

reduce the sickness for equivalent duration.

Observe [INAUDIBLE] your test such as resistant to thermal cracks by

[INAUDIBLE] shrinkage test or test for [INAUDIBLE] bounding strength

can be carried out within the frameworks on the formulation steadies.

Both of asphalt mixtures are standardized for these various tests.

The formulation study involves carrying out these various tests

in the laboratory to confirm the composition of the asphalt mix.

Net share and dozing of it's constituents aggregants and asphalt counter.

Thank you very much for your attention and see you for another section.

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