Dispersion Mechanisms of Alite Stabilized by Superplasticizers Containing Polyethylene Oxide Graft Chains

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Title: Dispersion Mechanisms of Alite Stabilized by Superplasticizers Containing Polyethylene Oxide Graft Chains

Author(s): E. Sakai and M. Daimon

Publication: Special Publication

Volume: 173

Issue:

Appears on pages(s): 187-202

Keywords: Adsorption; dispersants; polyethylene; superplasticizers

Date: 9/1/1997

Abstract:
Recently comb-like macromolecules which have a graft chain made of polyethylene oxide are attracting attention as superplasticizers and put to practical use in the field of flowing and high strength concrete. Comparing ordinary AE water reducing agents, these admktures have a higher water reducing ratio, smaller change of slump with the time and less set retarding property. The properties of solid spheres dispersed in solvent is explained by the magnitude of the inter-particle potential energy. We discuss the total potential energy of alite stabii by adsorbed superplasticizer containing polyethylene oxide graft chains. The interparticle potential energy was mainly controlled by steric hindrance effect of adsorbed macromolecule and van der Waals interaction of .