Comprehension of demoulding mechanisms at the formwork/oil/concrete interface

The implementation of concrete and its association with a release agent influence the aesthetics of the concrete facings. The mineral oils tend to be replaced by vegetable formulations, to reduce the impact of the substances spilled in the environment. From a technical point of view, it is important to characterize the action of these new formulations at the interface concrete/oil/formwork. Two performing techniques have been used to study the physicochemical processes, the tribometry and electrochemical impedance spectroscopy. The correlation of the results obtained allowed to improve the understanding of the mechanisms involved at the interface mould/oil, in connection with the use of an acidifier in the formulation

Operationalising the Concept of Motility: A Qualitative Study

In modern society, spatial mobility is highly prized, since it is associated with the idea of individual freedom (freedom to travel wherever whenever, freedom to choose one’s relationships, freedom of residential location, etc.). Spatial mobility is so appreciated that it has become an established ideology, putting pressure on individuals to expand their mobility and to be able to adapt to spatial changes of living and working conditions (delocalisation of jobs, closing of local public services, etc.). In this context, the capacity to be mobile – in other words, the motility – is a deciding factor of social integration. How can motility be characterised? Which aspects must be taken into account in conducting a comparative analysis of individuals ’ motility? In what way does motility constitute a factor of social differentiation? Our article aims to render the concept of motility operational. Building on an exploratory qualitative study, we explain which factors define the potential of an indivi-dual to be mobile in geographic space in the perspective of daily life organisation. Three aspects are discussed: the portfolios of access rights each individual has set up, his or her aptitudes for mobility and his or her representations that underpin cognitive appropriation of transportation supply. The rationales explaining why and how the motility of individuals is built up (or not) are also considered. In the end, our article demonstrates that motility is indeed a form of capital – in analogy with the financial, social and cultural capital – and that it is a factor of social differentiation that modern sociology cannot disregard. Operationalising the Concept of Motility: A Qualitative Exploration 2