08/12/2021
Marie Skłodowska-Curie Actions

MSCA-COFUND-CLEAR-Doc - PhD Position #CD21-47: Characterization and modelling of the durability of portland cement concrete containing recycled reclaimed asphalt pavement

This job offer has expired


  • ORGANISATION/COMPANY
    Université Gustave Eiffel
  • RESEARCH FIELD
    EngineeringCivil engineering
  • RESEARCHER PROFILE
    First Stage Researcher (R1)
  • APPLICATION DEADLINE
    21/03/2022 17:00 - Europe/Brussels
  • LOCATION
    France › Champs sur Marne
  • TYPE OF CONTRACT
    Temporary
  • JOB STATUS
    Full-time
  • HOURS PER WEEK
    35
  • OFFER STARTING DATE
    01/10/2022
  • EU RESEARCH FRAMEWORK PROGRAMME
    H2020 / Marie Skłodowska-Curie Actions COFUND
  • MARIE CURIE GRANT AGREEMENT NUMBER
    101034248

OFFER DESCRIPTION

In recent years, great importance has been attached to the recycling and reuse of reclaimed asphalt pavement (RAP) in order to build new resistant and durable structures. This approach complies with the European Union’s general agenda to move the economic strategy from a linear approach to a circular one that respects the environment. Such approach might significantly improve the management of non-renewable natural resources and might lead to reductions in waste storage in public landfills, environmental pollution and emission of greenhouse gases as well as the decrease of construction costs.

Several techniques for recycling RAP have been developed, including hot recycling (in bituminous mixes) and cold reuse (treatment with bitumen emulsion and/or cement). Among the cold reuse techniques, it is possible to recycle RAP in portland cement concrete (PCC) as a substitute for natural aggregates. Several recent studies carried out by researchers around the world have mechanically characterized concrete made from recycled RAP and have shown the possibility of reusing this waste, up to certain percentage, in PCC. Among these studies are those carried out by ENIT research team and were published by several international indexed journals.

On the other hand, over the past few decades, researchers and practitioners have become more aware that durability characteristics of a construction material must be carefully evaluated as other typical aspects such as mechanical properties and cost. This awareness comes from the substantial increase in repair and replacement costs of structures due to materials failure, which have burdened the total construction budget. These repair and maintenance costs shifted the emphasis towards life-cycle cost rather than initial construction cost and forced engineers to pay more attention to durability issues in order to better estimate service lives. In addition to this economical point of view, durable materials bring an ecological advantage as lasting longer means more conservation of natural resources. According to Committee 201 of the American Concrete Institute (ACI), durability of portland cement concrete is defined as its ability to resist weathering action, chemical attack, abrasion, or any other process of deterioration. This means that a durable concrete conserves its original quality and therefore its serviceability when exposed to the environment for which it was formulated. For this reason, it is intended to study the durability of RAP concrete under different set of conditions.

Thus, it becomes crucial to study the durability of PCC containing RAP especially that the presence of RAP changes the microstructure of the concrete and can consequently affect its durability, particularly in aggressive environments. In addition, the research studies which have looked at the durability indicators of this kind of concretes are limited and their results are often contradictory.

The proposed thesis focuses on the reuse of RAP waste in PCC: a technique that fits perfectly into the sustainable development approach. Its objective is to study the durability of concrete containing RAP. The study will begin with a literature review on RAP cold recycling, durability indicators, and types of durability tests. The second part relates to an experimental program in which various durability tests will be carried out on concretes incorporating different substitution rates of natural aggregates (gravel and sand) by RAP aggregates (gravel-RAP and sand-RAP). In this experimental program, three aspects will be considered: the aspect of porosity and permeability (to water and eventually to gases) of PCC containing RAP, the aspect of accelerated aging through the carbonation test and the aspect of resistance to external agressions in an agressive environment (penetration of chloride ions and eventually sulfate ions). The third part of the thesis will concern the modeling of the durability indicators through existing available models developed for ordinary PCC and the proposal of a new models for predicting these indicators according to the design parameters of concrete containing RAP."

International Mobility:

This thesis will be in co-supervision (cotutelle) with ENIT, Tunis (Tunisia). For more information, contact the PhD thesis supervisor.

 

More Information

Benefits

  • High-quality doctoral training rewarded by a PhD degree, delivered by Université Gustave Eiffel
  • Access to cutting-edge infrastructures for research & innovation.
  • Appointment for a period of 36 months based on a salary of 2 700 € (gross salary per month).
  • Job contract under the French labour legislation in force, respecting health and safety, and social security: 35 hours per week contract, 25 days of annual leave per year.
  • International mobility will be mandatory
  • An international environment supported by the adherence to the European Charter & Code.
  • Access to dedicated CLEAR-Doc trainings with a strong interdisciplinary focus, together with a Career development Plan.

 

Eligibility criteria

  • At the time of the deadline, applicants must be in possession or finalizing their Master’s degree or equivalent/postgraduate degree. At the time of recruitment, applicants must be in possession of their Master’s degree or equivalent/postgraduate degree which would formally entitle to embark on a doctorate.
  • At the time of the deadline, applicants must be in the first four years (full-time equivalent research experience) of their research career (career breaks excluded) and not yet been awarded a doctoral degree. Career breaks refer to periods of time where the candidate was not active in research, regardless of his/her employment status (sick leave, maternity leave etc). Short stays such as holidays and/or compulsory national service are not taken into account.

  • At the time of the deadline, applicants must not have resided or carried out their main activity (work, studies, etc.) in France for more than 12 months in the 3 years immediately prior to the call deadline.

  • Applicants must be available to start the programme on schedule (around 1st October 2022).

Selection process

Additional comments

  • The First step before applying is contacting the PhD supervisor. You will not be able to apply without an acceptation letter from the PhD supervisor.
  • Please contact the PhD supervisor for any additional detail on job offer.
  • There are no restrictions concerning the age, gender or nationality of the candidates. Applicants with career breaks or variations in the chronological sequence of their career, with mobility experience or with interdisciplinary background or private sector experience are welcome to apply.

Web site for additional job details

Offer Requirements

  • REQUIRED EDUCATION LEVEL
    Engineering: Master Degree or equivalent
  • REQUIRED LANGUAGES
    FRENCH: Excellent
    ENGLISH: Basic

Skills/Qualifications

  • At the time of the deadline, applicants must be in possession or finalizing their Master’s degree or equivalent/postgraduate degree.
  • At the time of recruitment, applicants must be in possession of their Master’s degree or equivalent/postgraduate degree which would formally entitle to embark on a doctorate.

 

Specific Requirements

  • The thesis will be written and defended in French.
  • This thesis will be in co-supervision (cotutelle) with ENIT, Tunis (Tunisia). For more information, contact the PhD thesis supervisor.

Work location(s)
1 position(s) available at
Université Gustave Eiffel
France
Champs sur Marne
77454
5 Boulevard Descartes

EURAXESS offer ID: 716902

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