Journal
CEMENT AND CONCRETE RESEARCH
Volume 35, Issue 1, Pages 133-140Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.cemconres.2004.07.008
Keywords
dispersion; cement; MgO; superplasticizer; atomic force microscope (AFM)
Ask authors/readers for more resources
The interactions between adsorbed superplasticizer layers have been studied using direct force measurements, with an atomic force microscope. MgO was used as a nonreactive model system for cement, and a novel freeze granulation method for the production of spherical particles suitable for the colloidal probe atomic force microscope (AFM)-technique is reported. We found that the interactions induced by the adsorption of the anionic acrylic ester-ethylene oxide (AAE-EO) copolymers can be described as electrosteric, with an electrostatic and steric contribution. The range of the steric repulsion varied between 1.5 and 5 nm and could be related to the length of the grafted ethylene oxide chains. The lignosulfonate also induced a significant steric contribution that could be related to a dense coil conformation of the adsorbed superplasticizer. (C) 2004 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available