Polycarboxylate ester adsorption on cement grains: Influence of polydispersity
Abstract
Although in academic and industrial practice polymers are typically described by their average molecular parameters, most often they display a polydispersity both in size and in properties. In this paper, we focus on the influence of polydispersity on the adsorption of polycarboxylate ester on cement grains and on its influence on the definition of a so-called affinity of the polymer to the surface. We first show that a constant fraction of a polydisperse polycarboxylate ester always adsorbs no matter the availability of adsorption sites. We moreover suggest from our measurements and from scaling laws from literature that the degree of polydispersity in the structure of polycarboxylate ester should affect adsorption at both low and intermediate dosages and hydrodynamic radii in solution. However, it shall not have a major influence on polymer layer thickness or saturation dosage. Mehr anzeigen
Publikationsstatus
publishedExterne Links
Zeitschrift / Serie
Cement and Concrete ResearchBand
Seiten / Artikelnummer
Verlag
ElsevierThema
Polycarboxylate ester; Adsorption; Cement; PolydispersityOrganisationseinheit
03891 - Flatt, Robert J. / Flatt, Robert J.
Förderung
140615 - Mastering flow loss of cementitious systems (SNF)