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Chemical Models for the Mechanisms that Influence the Nature and Structure of the Interfacial Transition Zone

Published online by Cambridge University Press:  21 February 2011

D. L. Cocke ,
M. Y. A. Mollah ,
T.-C. Lin ,
R. K. Vempati  and
T. R. Hess
D. L. Cocke
Affiliation:
Gill Chair of Analytical Chemistry, Lamar University, Beaumont, TX 77710
M. Y. A. Mollah
Affiliation:
Visiting Professor, Department of Chemistry, Dhaka University, Bangladesh
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Abstract

The chemical nature and microstructure of the interfacial transition zone (ITZ) are influenced by the interfacial mechanisms of hydration which are primarily controlled by surface and nearsurface phenomena. Recent works from our laboratory involving superplasticizers, metal anions that retard hydration and interaction with silicate based aggregates have established that the interfacial chemistry is of fundamental importance in understanding the mechanisms of CSH formation, surface chemical compound formation and mineralization of the interfacial transition zone and its interaction with the hydrated cement particles and the aggregate. A surface charge control reaction model that accounts for :he importance of calcium and other cations and anions will be outlined and used to discuss the interfacial physical chemistry of the ITZ and its ultimate chemical nature and structure.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 370: Symposia Va/Vb – Microstructure of Cement-Based Systems/Bonding and Interfaces in Cement... , 1994 , 329
Copyright
Copyright © Materials Research Society 1995

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