Abstract
This paper presents a numerical model for the simulation of the hydration process and the development of the microstructure on Self-compacting cement paste (SCC) containing limestone powder as filler. Based on a series of experimental results, e.g. thermometric isothermal conduction calorimetry tests, environmental scanning electron microscopy (ESEM) image analysis, thermogravimetric analysis (TGA) and the derivative thermogravimetric analysis (DTG) measurements, the hydration process, the solid phase distribution, total porosity and pore size distribution have been determined at different hydration stages.
Based on the hydration chemistry, the stoichiometry and the hydration kinetics of cement with limestone, an analytical hydration model and a microstructural model of self-compacting cement paste are proposed. Two SCC mixtures with w/c 0.41 and w/c 0.48, both with water/powder ratio (w/p) 0.27, were simulated and compared to a traditional cement paste (TC) with w/c 0.48. The simulation results were discussed and validated against experimental measurements.
Résumé
Cet article présente un modèle numérique qui réalise une simulation du processus d’hydratation et le développement de la microstructure de la pâte de ciment auto-compactante (SCC) contenant comme filler de la poudre calcaire. Sur base d’une série de résultats expérimentaux—par exemple∼: tests de calorimétrie par conduction thermométrique isotherme, analyse d’images par microscopie électronique environnementale (ESEM), analyse thermogravimétrique (TGA), analyse thermogravimétrique dérivée (DTG)—, le processus d’hydratation, la distribution de la phase solide, la porosité totale et la distribution de la taille des pores ont été déterminés à différentes étapes de l’hydratation.
Sur base de la chimie et de la stoechiométrie de l’hydratation et de la cinétique de l’hydratation du ciment en présence de calcaire, un modèle analytique d’hydratation ainsi qu’un modèle de la microstructure de la pâte de ciment auto-compactante sont proposés. Des simulations concernant deux mélanges de SCC avec un rapport E/C de, respectivement, 0,41 et 0,48 et un rapport eau / poudre (W/P) de 0,27 ont été menées. Les résultats ont été comparés avec ceux d’une pâte de ciment traditionnelle (TC) dont le rapport E/C vaut 0,48. Les résultats de la simulation ont été discutés et validés en les comparant avec des mesures expérimentales.
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Open Access This is an open access article distributed under the terms of the Creative Commons Attribution Noncommercial License ( https://creativecommons.org/licenses/by-nc/2.0 ), which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
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Ye, G., Liu, X., Poppe, A.M. et al. Numerical simulation of the hydration process and the development of microstructure of self-compacting cement paste containing limestone as filler. Mater Struct 40, 865–875 (2007). https://doi.org/10.1617/s11527-006-9189-6
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DOI: https://doi.org/10.1617/s11527-006-9189-6