Effect of nano-silica particles on the hydration, the rheology and the strength development of a blended cement paste

Abstract : The aim of the present work is to evaluate the effect of nano-silica (NS) on the hydration, the rheology and the strength development of cement pastes. The advance of chemical reactions is monitored by mean of isothermal calorimetry and thermogravimetric analysis: adding nano-silica particles speeds up the hydration of the cement paste but alter its workability. Indeed, the effect of the nano-silica particles on the hydration kinetics can be modelled by accounting for its high specific surface and a flocculation model based on the DLVO theory is proposed so as to investigate the stability of nano-silica suspensions in the fresh cement paste. As a consequence, the dosage of nano-silica can be optimized to promote the early age strength. Lastly, a ternary blend incorporating fly ash can be designed so as to provide an early age strength similar to that of the cement while lowering the induced CO 2 emissions.
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https://hal.archives-ouvertes.fr/hal-01900692
Contributeur : Francis Lavergne <>
Soumis le : lundi 22 octobre 2018 - 13:41:11
Dernière modification le : jeudi 7 février 2019 - 16:42:01
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F. Lavergne, R. Belhadi, J. Carriat, A. Ben Fraj. Effect of nano-silica particles on the hydration, the rheology and the strength development of a blended cement paste. Cement and Concrete Composites, Elsevier, 2019, 95, pp.42 - 55. ⟨10.1016/j.cemconcomp.2018.10.007⟩. ⟨hal-01900692⟩

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