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Factors affecting the reactivity of slag at early and late ages

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New insights into the acid mediated disproportionation of pentavalent uranyl

Marinella Mazzanti

The reaction of benzoic acid with the uranyl(v) complex [(UO 2Py5)(KI2Py2)] in pyridine leads to immediate disproportionation with formation of a hexanuclear U(iv) benzoate cluster, a bis-benzoate complex of uranyl(vi) and water. © 2010 The Royal Society o ...

2010

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Thermodynamic solubility calculations are normally only related to thermodynamic equilibria in solution. In this paper, we extend the use of such solubility calculations to help elucidate possible precipitation reaction pathways during the entire reaction. ...

Elsevier2009

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The influence of the presence of limestone on the hydration of Portland cement was investigated. Blending of Portland cement with limestone was found to influence the hydrate assemblage of the hydrated cement. Thermodynamic calculations as well as experime ...

2008

Vector modelling of hydrating cement microstructure and kinetics

Shashank Bishnoi

A new modelling framework, called μic, has been developed to enable simulations of complex particulate growths, in particular the microstructural evolution of hydrating cement paste. μic has been developed using the vector approach, which preserves the mul ...

EPFL2008

Investigation of molar volume and surfactant characteristics of water-soluble organic compounds in biomass burning aerosol

Athanasios Nenes

In this study, we characterize the CCN activity of the water-soluble organics in biomass burning aerosol. The aerosol after collection upon filters is dissolved in water using sonication. Hydrophobic and hydrophilic components are fractionated from a porti ...

European Geosciences Union2008

Effect of particle size on the hydration kinetics and microstructural development of tricalcium silicate

Maria Mercedes Costoya Fernandez

Impure tricalcium silicate (Alite, C3S) is the most important and abundant phase of Portland cement. It reacts quickly with water to give calcium hydroxide (CH) and calcium silicate hydrate (C-S-H) which is the most important phase for strength development ...

EPFL2008

Mix proportioning of underground cemented tailings backfill

The usage of cemented tailings backfill (cemented paste backfill) in the underground by mining industry is becoming increasingly important. However, until now, the mix proportioning of CTB has been mainly based on the realization of extensive laboratory te ...

2008

In situ dynamic SEM imaging of hydration of cement using WETSEM technology

Karen Scrivener, Emmanuel Gallucci

This paper presents an in situ study of the hydration of cement pastes in the SEM, made possible by the development of a radical new technology for the investigation of wet samples: the QX capsule from QuantomiX, based on the WETSEM technology, consists of ...

2007

Complexes luminescents de lanthanides avec des dérivés du cyclène comme briques pour l'ingénierie de sondes analytiques biomédicales

This work deals with the engineering of a new luminescent complex of lanthanide, able to be specifically grafted onto biological materials and to emit a characteristic light useful in quantifying the concentration of the target molecules. We have based our ...

EPFL2004