This paper focuses on the study of the reaction between limestone and sodium hydroxide solution. This reactionis used to produce alkali-activated mortars after curing and in the presence of unreactive siliceous sand. Thekinetics of this reaction is investigated by semi-adiabatic calorimetry experiments. The formulation parametersare fixed but the c...
Published in Bioresource technology
In this study, a high-performance porous adsorbent was prepared from biochar through a simple one-step alkali-activated pyrolysis treatment of walnut shells, and it was effective in removing tetracycline (TC). The specific surface area (SSA) of potassium hydroxide-pretreated walnut shell-derived biochar pyrolyzed at 900 °C (KWS900) increased remark...
De nos jours, la problématique environnementale est un enjeu majeur pour l’ensemble des secteurs économiques liés à l’activité humaine. Le secteur du Bâtiment, conscient de son impact, notamment au cours de la phase fabrication des matériaux et produits, développe de nouvelles solutions, notamment le remplacement du ciment par de nouveaux liants, o...
This paper presents an experimental study on the interface bonding properties of polyvinyl alcohol (PVA) fiber in alkali-activated slag/fly ash (AASF) pastes. Three interface bonding properties (i.e., the chemical bonding energy Gd, the initial frictional bond strength τ0, and slip-hardening behavior) were determined using single-fiber pullout test...
Les matériaux alcali-activés apparaissent comme une alternative potentielle aux liants hydrauliques classiques dans plusieursapplications en génie civil, pour répondre à des enjeux techniques et environnementaux. Néanmoins, ces matériaux n’ont pas étésuffisamment explorés dans le domaine du renforcement des sols. Cette thèse a pour but d’évaluer le...
Interest in geopolymer concrete (GeoPC) and in rubberised concrete (RuC) has grown over the past two decades. The former offers an attractive alternative to ordinary Portland cement (OPC) concrete given its environmental footprint, while the latter provides a sustainable solution to tyre recycling and helps mitigate the depletion of natural aggrega...
Published in Waste management (New York, N.Y.)
The safe disposal of municipal solid waste incineration fly ash (MSWIFA) has become the weakest link of the circular economy of MSW due to its hazardous nature. In this study, we focused on the heavy metals solidification of MSWIFA by using alkali-activation technology and introducing a mold-pressing method. The influence of alkaline activator (AA)...
This study investigates the effects of curing temperature on alkali-activated fine particles of undivided construction and demolition waste (CDW) aggregates. Previous investigations demonstrated that such activated fines can stabilize the whole mixture thereby improving its mechanical properties. To comprehensively investigate the behaviour of the ...
This study presents a comprehensive experimental investigation on the fracture properties of hardened alkali-activated slag/fly ash (AASF) pastes in relation to the microstructure formation and reaction product composition. The main reaction product in AASF is C-(N-)A-S-H gel along with minor hydrotalcite phase, with the polymerization of C-(N-)A-S...
L’acide fluorosilicique (H2SiF6) est l’un des déchets rejetés par la production industrielle d'engrais phosphatés et constitue un défi environnemental (toxicité) et économique (traitement des déchets en fin de chaîne) majeur. Il est donc essentiel d'opter pour le recyclage de ce déchet par un système de traitements générant des substances utilisabl...
