The purpose of this present dissertation is based on colloidal latex particles as film forming construction additives. This involves the synthesis and characterization of charged latex dispersions from styrene/n-butyl acrylate.
Employing the layer-by-layer deposition technique latex particles were coated with polycondensate-type dispersants. Incorporation of the novel hybrid core-shell additives into cement paste resulted into an improved and prolonged plastification and reduction in segregation. Coating of acid soluble melamine-formaldehyde core templates resulted in polyelectrolyte microcapsules after core removal.
Selective adsorption of the latex particles on oppositely charged cement hydrates could be confirmed. In hardened cement and at dosages below saturation adsorption, only native latex particles but no polymer films were found. Once latex dosage exceeds the amount of saturation adsorption, large polymer films become visible.
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