Preprint Article Version 1 This version is not peer-reviewed

Microstructural Modeling of Glass Cullet Reaction in Cementitious Systems

Version 1 : Received: 15 May 2018 / Approved: 17 May 2018 / Online: 17 May 2018 (08:07:24 CEST)

How to cite: Mirzahosseini, M. Microstructural Modeling of Glass Cullet Reaction in Cementitious Systems. Preprints 2018, 2018050239 (doi: 10.20944/preprints201805.0239.v1). Mirzahosseini, M. Microstructural Modeling of Glass Cullet Reaction in Cementitious Systems. Preprints 2018, 2018050239 (doi: 10.20944/preprints201805.0239.v1).

Abstract

Finely ground glass has the potential for pozzolanic reactivity and can serve as a supplementary cementitious material (SCM). Glass reaction kinetics depends on both temperature and glass composition. Microstructural modeling is a helpful approach to get better understanding of cement hydration and microstructure development. Mechanical and performance properties of concrete are directly related to the development of concrete microstructure, which is the consequence of progress in cement hydration. This study initially provides a comprehensive background about cement hydration process and microstructural modeling of the hydration. It then utilizes results of experimental studies, i.e. isothermal calorimetry and thermogravimetric analysis, to find kinetics equation parameters called “Avrami Constants”. For the first time, these constants were found for three main components of cement, i.e. C3S, C2S, and C3A, and also for glass particles smaller than 25 µm. Although modeling of cement hydration and cementitious systems containing single glass particles showed promising results, simulations of combined glass types and sizes showed that more work on microstructural models is needed to properly model the reactivity of mixed glass particle systems.

Subject Areas

microstructural modeling; cement hydration; Avrami constants; hydration kinetics; glass cullet; supplementary cementitious material (SCM)

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