Open Conference Systems, StatPhys 27 Main Conference

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Aggregation kinetics of a colloidal model for CSH with added polymers
Manuel Camargo

##manager.scheduler.building##: Edificio Santa Maria
##manager.scheduler.room##: Auditorio San Agustin
Date: 2019-07-08 11:45 AM – 03:30 PM
Last modified: 2019-06-15

Abstract


Calcium-silicate-hydrate (CSH) is formed from the hydration of C3S and precipitates around clinker grains allowing them to bind together. The structural and kinetic features of the formation of the CSH amorphous phase have been studied by numerically simulating the precipitation process using polydisperse colloidal models [1,2].  Among the goals of nanotechnology research applied to construction materials is the search of nanocomposites that enhance the properties of cement, and the addition of superabsorbent polymers to enhance freeze-thaw resistance or thermoplastic polymers as additional binding agents are a examples of such practices. In this work, we study the effects that the addition of linear polymers has on the CSH precipitation. We employ MD simulations of the recently proposed colloidal system along with a coarse-grained model of the polymers in order to systematically analyze the effect of  the latter on the properties of the previously studied precipitation model. We study the consequences of changing the interactions between the components of the system, the rigidity, length and concentration of the polymers,as well as, the precipitation rate.

[1] E. Masoero et al. Phys. Rev. Lett. 109, 155503 (2012)
[2] E. Masoero et al. Soft Matter 10, 491 (2014)