M/F Post-doctoral position - Study of the early-age behavior of earth masonry structures

13 Apr 2024
Job Information

Organisation/Company

CNRS

Department

Sols, solides, structures, risques

Research Field

Engineering » Materials engineering
Physics » Acoustics

Researcher Profile

Recognised Researcher (R2)

Country

France

Application Deadline

3 May 2024 - 23:59 (UTC)

Type of Contract

Temporary

Job Status

Full-time

Hours Per Week

35

Offer Starting Date

1 Jun 2024

Is the job funded through the EU Research Framework Programme?

Not funded by an EU programme

Is the Job related to staff position within a Research Infrastructure?

No

Offer Description

In the framework of the post-doctoral position, the drying process of masonry structures will be analysed at the scale of the block/mortar interface taking into account the type of block and the vertical stress applied to the assembly during the drying.

The main objectives are to better understand the phenomenology, depending on confining pressure and intrinsic permeability, and to furnish a case study to validate a numerical model Dalpont, 2007 using materials properties already available in the literature Anglade, 2022 et Laou, 2021. Indeed, to avoid a time consuming identification process, the same materials than in Anglade, 2022 et Laou, 2021 will be used for this post-doc project. To achieve these objectives, a multiscale approach will be used. At the macroscopic scale, controlled THM drying test will be performed in a climatic chamber. Image analysis \cite{naillon2019,sarkis2023} will be used to track the moisture cloud during the early-age drying phase. To assess the influence of the intrinsic permeability of the block and of the confining force different configurations will be setup under constant and controlled relative humidity and temperature. The water content will be tracked by dedicated embedded sensors. The knowledge of the material already studied in literature, will allow to deduce the suction from this measurements. Filter paper will also be used to validate this approach from the ''mortar alone" configuration. Finally triplets will be tested to obtain their shear strength. At the mesoscale, the study will consist in the analysis of the migration of the moisture clog, at the early-age block-mortar-block assembly, from neutron/X-Ray tomography using the experimental platform NeXT (Tengattini, 2020). The equipment whose feasibility has already been assessed in Moreira, 2022 will be employed. This test will give a measurement of the moisture content spreading in the granular stacking that constitute the mortar joint. It will also allow analysing shrinkage and cracks development, and assess the phenomenology involved at the interface brick-mortar. The experimental results will serve as a benchmark for a THM numerical model based on Dalpont, 2007.

3SR laboratory and ILL, experimental work

Requirements

Research Field

Engineering

Education Level

PhD or equivalent

Research Field

Physics

Education Level

PhD or equivalent

Languages

FRENCH

Level

Basic

Research Field

Engineering » Materials engineering

Years of Research Experience

1 - 4

Research Field

Physics » Acoustics

Years of Research Experience

1 - 4

Additional Information
Eligibility criteria

Experience in the mechanical characterization of masonry, raw earth materials, and/or imaging (X-ray, neutron, DIC) would be appreciated.

Additional comments

The application file must include cover letter, CV, grade transcripts. Contact [email protected] .

Website for additional job details

https://emploi.cnrs.fr/Offres/CDD/UMR5521-FLOVIE-002/Default.aspx

Work Location(s)

Number of offers available

1

Company/Institute

Sols, solides, structures, risques

Country

France

City

GRENOBLE

Geofield

Where to apply

Website

https://emploi.cnrs.fr/Candidat/Offre/UMR5521-FLOVIE-002/Candidater.aspx

Contact

City

GRENOBLE

Website

http://www.3sr-grenoble.fr/

STATUS: EXPIRED