MDF cements: Synergy of the humidity and temperature effects

MDF cement is a polymer-cement composite at the micrometer and nanometer levels, where the formation of atomic level cross-links is crucial for the technologically relevant properties. Crucial cross-linking section represents the interface, where oxygen-shared co-ordination of P, C, Al and Fe atoms...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2004, Vol.76 (1), p.91-96
Main Authors: DRABIK, M, GALIKOVA, L, VARSHNEY, K. G, QURAISHI, M. A
Format: Article
Language:English
Subjects:
Applied sciences
Buildings. Public works
Cement concrete constituents
Cements
Exact sciences and technology
Materials
Properties and test methods
Properties of anhydrous and hydrated cement, test methods
Online Access:Get full text
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Summary:MDF cement is a polymer-cement composite at the micrometer and nanometer levels, where the formation of atomic level cross-links is crucial for the technologically relevant properties. Crucial cross-linking section represents the interface, where oxygen-shared co-ordination of P, C, Al and Fe atoms secures the bonding of polymer to the AFm skeleton. The cross-links chemistry affects the porosity, microstructure and moisture resistance, the later being generally the key drawback of MDF cements. The applicability of MDF synthesis procedure, the coincidence of the interfacial cross-linking and the moisture resistance of MDF-related mixes based on two industrial Portland cements (CEM 1, CEM 11) and poly-P is reported. The knowledge of the moisture resistance of synthesized material is of paramount importance; two independent experimental methods confirmed that the moisture resistance of MDF cements based on CEM I (or CEM 11) with 5% of poly-P achieves sufficient levels at 50% RH and at ambient values of RH. The results of thermal analysis are directly related to the former knowledge on the appearance and role of cross-links in the interfacial zone of MDF cements.
ISSN:1388-6150
1588-2926
DOI:10.1023/B:JTAN.0000027807.89788.d4