An experimental and mesoscopic lattice simulation study of styrene-butadiene latex-cement composites properties - INSU - Institut national des sciences de l'Univers Access content directly
Journal Articles Materials and structures Year : 2005

An experimental and mesoscopic lattice simulation study of styrene-butadiene latex-cement composites properties

Abstract

The consequences of styrene-butadiene rubber (SBR) latex addition on the hardness and structural properties of a cement matrix have been investigated. The results show that the primary effect of latex addition is the decrease in the so-called capillary porosity and a shift of the pore-size distribution towards the nanometer range. In spite of this, addition of latex significantly alters the hardness of the polymercement compound as compared to pure cement, due to the intrinsically smaller modulus of the polymer and the lack of strong interaction with cement phases. It is shown that the properties depend both on the Polymer/Cement (P/C) and Water/Cement (W/C) ratios. This study confirms that the butadiene-styrene copolymer is confined to the capillary porosity only and interacts but weakly with the different cement phases. In agreement with this, a simple mesoscopic lattice model, much inspired from Powers pioneering model for cement hydration, was shown to account for the porosity and composition dependence of hardness and modulus. A criterion for the activity of fillers is proposed.

Dates and versions

hal-00112580 , version 1 (09-11-2006)

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Olivier Rozenbaum, R.J.M. Pellenq, Henri van Damme. An experimental and mesoscopic lattice simulation study of styrene-butadiene latex-cement composites properties. Materials and structures, 2005, 38, pp.467-478. ⟨10.1007/BF02482143⟩. ⟨hal-00112580⟩
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