Tandre Oey

Water Vapor Sorption in Cementitious Materials—Measurement, Modeling and Interpretation

The rate and extent of uptake and release of moisture are critical in controlling the behavior of cementitious materials ranging from fluid transport to hygral deformations. While classically determined using an equilibrium (static) salt solution method (Baroghel-Bouny in Cem Concr Res 37:414–437, 2007), advanced capabilities offered by gravimetric dynamic vapor sorption (DVS) analyzers, are now permitting acquisition of sorption spectra at microgram (

Hydration and strength development in ternary portland cement blends containing limestone and fly ash or metakaolin

\upmu \hbox {g}

On the feasibility of using phase change materials (PCMs) to mitigate thermal cracking in cementitious materials

μg) resolution on the order of a few weeks. This work highlights new multicycle determinations of adsorption/desorption isotherms, acquired using a custom-built DVS analyzer for well-hydrated alite and ordinary portland cement pastes over a range of water-to-solid ratios (

An improved basis for characterizing the suitability of fly ash as a cement replacement agent

w/s

Comparison of Ca(NO3)2 and CaCl2 Admixtures on Reaction, Setting, and Strength Evolutions in Plain and Blended Cementing Formulations

w/s, mass basis). Special focus is paid to describe measurement aspects relevant to acquiring reliable spectra, and their interpretation. Sorption isotherms are used to assess transport properties, and sorption hysteresis and its irreversibility following first drying. Based on an optimization-based criterion, the Young-Nelson model is selected to simulate sorption evolutions, including the effects of hysteresis. Sensitivity analyses carried out using this model are used to understand the role of parameters, including porosity and