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

Title: An experimental and mesoscopic lattice simulation study of styrene-butadiene latex-cement composites properties
Author(s): O. Rozenbaum, R. J.-M. Pellenq, H. Van Damme
Paper category : journal
Serial title: Materials and Structures
Abreviated Serial title: Mater. Struct.
ISSN: 1359-5997
Publisher: RILEM Publications SARL
Volume: 38
Issue: 278
Issue date: 2005-05-01
Publication year: 2005
Pages: 467 - 478
Total Pages: 12
Nb references: 46
Language: English

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 of 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 polymer-cement 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.

Online publication: 2005-02-15
Classification: Scientific Reports
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/14356