Vincent Dubois

• PhD
• Institut Universitaire de Technologie, Béthune, France

This research work highlights the rheological and mechanical behavior of clayey/starch mixes.Several native and derivate starches have been studied in association with two types of clayey materials: quarry fines and kaolinite. The mixes were manufactured with a constant starch/clayey material ratio of 1%. The optimal water content has been determin...

Growing in the field of construction, 3D printing allows to build non-standard shapes and to optimise the use of resources. The development of printable materials requires good control of the fresh state of the material—between mixing and printing, a printable material has to evolve from fluid matter to be pumpable (extrudability) up to a matter su...

Mineral foam concretes are classified as lightweight concretes, which are characterized by the presence of air voids in the materials due to the use of a suitable foaming agent. Their physical and mechanical properties are strongly governed by microstructural properties, which depend on several factors such as foam quantity, water/binder ratio (W/B...

the poster is about the development of a biosourced foaming agent from a biomass, allowing to obtain an insulating foam for the filling of prefabricated or printed walls

La RE 2020 favorise la construction de bâtiments peu voire non énergivores ayant un bas impact environnemental, de la production des matières premières à la démolition. L'utilisation de ressources de proximité issues de la biomasse est une réponse. Dans ce contexte, le projet ABIOBAT étudie l'utilisation de biomasses végétales présentes en région H...

This research work is part of an ecological approach to sustainable development and aims to create a mineral insulating foam with low environmental impact and energy savings. The objective of this work is to optimize a mineral-organic foam based on flax shives, developed by the laboratory of Civil Engineering and Geo-Environment Laboratory (LGCgE)...

This webinar “Advances in Biobased Polymeric Materials in Building and Construction “ is to present the main types of polymers used in building and construction, to highlight the properties which make it an appropriate choice of material and to list examples of their applications.

the poster is about the development of a biosourced foaming agent from a biomass of the Haut-de-France region, allowing to obtain an insulating foam for the filling of prefabricated or printed walls

This study work focus on the development of self-standing insulating wall elements using 3D printing technology. Additive manufacturing is promising for the construction industry as it allows complex geometry exploration but also prevent the need for formwork as it is in the traditional building techniques. In this research work, flax and quarry fi...

In this paper, we study the influence of two types of starch on earth hemp or flax straw mixtures at fresh and hardened states. The main goal is to propose new non-load bearing earthen for indoor. The mass percentage of starch/binder (S/B) in mixtures was fixed at 1% of mass. The VEBE consistometer test has been used to fix a similar consistency be...

This research work aims to develop a rapid hardening lightweight composite including flax shives, foaming agent and earthern materials. The results show a satisfying workability just after the mixing step and a rapid hardening of about less than thirty minutes. The mixes with a large amount of flax shives show a thermal conductivity inferior to 0.1...

The quarry fines (QF), coming from aggregate washing processes, are mixed with hemp straw (HS) to make hemp concrete for the production of non-bearing blocks. The study shows that mixes with only quarry fines and hemp straw give low mechanical performances. To enhance these results, lime and a superplasticizer are added in the mix design. By keepin...

This research work highlights a new approach in the sector of building materials based on bio resources. An experimental investigation was conducted in order to study the rheological and mechanical behavior of earth/starch mixes. In this study, two types of earth materials have been studied: quarry fines and a model material which was kaolinite. Fo...

La méthode de formulation des enrobés impose de valider la résistance aux déformations permanentes du matériau.

Across the world, every year, several millions of tons of sediments are dredged in harbours. These sediments, which are sometimes polluted, represent an interesting granular resource for the civil engineering. For this study, fine sediments are chosen because of the difficulties to evacuate them after dredging, in comparison to sands, induced by th...

The effectiveness of laboratory compaction methods, for reproducing asphalt mixtures specimens with the same characteristics as on the actual building site, remains relatively unknown. The present paper is aimed at investigating the variability in air void content, therefore in compaction level, of three asphalt mixture types: a continuously-graded...

With the increase in environmental awareness, in combination with a more restrictive legislation, traditional solutions to the management of dredged sediments, such as dumping at sea or disposal to landfills, become more and more inadequate. In order to improve the management of dredged marine sediments, alternative solutions such as beneficial use...

The RILEM TC-ATB-TG5, in charge of recycling of bituminous materials has decided to develop a laboratory procedure with the aim of reproducing the ageing of bituminous materials until the end of their service life (milled product). This procedure will help to assess the recyclability of mixtures and will allow Recycled Asphalt Pavement (RAP) produc...

The management of marine sediments after dredging has become increasingly complex. In the context of sustainable development, traditional solutions such as immersion will be increasingly regulated. More than ever, with the shortage of aggregates from quarries, dredged material could constitute a new source of materials. In this study of the potenti...

This paper examines the effects of treatments inducing the reduction of salts and the organic content on the Atterberg limits of marine dredged sediments. To define the liquid limits of the sediments, the results of the percussion-cup test and the fall cone test are compared for raw sediments and treated sediments. For the determination of the plas...

In this paper, the results of the standard percussion cup test, the penetration cone test, and the laboratory vane test performed on organic sediments and kaolin are discussed. First, the relationship between the water content and the cone penetration depth is explored. Second, the relationship between the shear strength, using the laboratory vane...

Reclaimed asphalt, obtained by milling of asphalt road layers can be re-used at once or stored. In the case of storage, an heterogeneity issue may occur when several types of materials, with different origins are mixed. At the scale of a storage zone or a stock pile, composition and properties of the reclaimed asphalts will be different, including...

In a political context in which energy and environmental stakes become increasingly strong, road engineering evolves to energy savings and environmentally friendly practices. In this context, cold mixes treated with bitumen emulsion appear as suitable techniques. Cold mix design and manufacture are empirical and usually controlled thanks to local c...

In the framework of LCPC fatigue carrousel studies [Corté and others, 1994; Gramsammer and others, 1994], rutting measurements on several mixes have been carried out. For each mix, the granular distribution has been identical, but different types of bitumen have been chosen : classical bitumen 50/70, EVA modified bitumen and SBS modified bitumen. T...

A full scale test road was built with marine dredged sediments at the Dunkirk harbour, in the north of France. The first objective of this work was to evaluate the compatibility of this material with current practice used to build roads with standard materials. In the second time, the impacts of time on the mechanical behaviour and the concentratio...

This article presents a new methodology for the management of dredging operations. Partly derived from existing methodologies (OECD, UNEP, AIPCN), its aim is to be more complete, by integrating the qualities and complementarities of former methodologies. Moreover, it was carried out in a context of sustainable development. Indeed, it supports, acco...

This paper presents the new methodology of management of dredging operations. Derived partly from existing methodologies (OECD, PNUE, AIPCN), it aims to be more comprehensive, mixing the qualities and the complementarities of previous methodologies. The application of the methodology has been carried out on the site of the Port of Dunkirk (FRANCE)....

Ce guide a été établi dans le cadre du PREDIS (Plan Régional d’Elimination des Déchets Industriels Spéciaux) de la Région Nord-Pas de Calais. Son objectif est de permettre une gestion des opérations de dragage dans un cadre de bonne gouvernance territoriale. Ce guide a été élaboré en partenariat avec différents ports, différents industriels de la...

A huge quantity of marine sand and sediments are dredged each year in Europe. Until recently, sediments were considered as a waste product of the dredging process and were a serious concern for the harbour managers. Today, they are seen as a valuable and natural resource that provides opportunities for a number of beneficial uses. This paper invest...